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Immunodeficiency

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A detailed physical examination helps recognize symptoms indicative of an immune disorder. Blood Tests: these tests are instrumental in diagnosing immunodeficiency as they measure: Infection-fighting proteins (immunoglobulins): Essential for robust immune defense, these protein levels are measured to evaluate immune function. Blood cell counts: Deviations in specific blood cells can point to an immune system anomaly. Immune system cells: These assessments are used to measure the levels of various immune cells. Genetic testing involves collecting samples from patients for molecular analysis when there is a suspicion of inborn errors in immunity. Most Primary Immunodeficiency Disorders (PIDs) are inherited as single-gene defects. The key genes associated with immunodeficiency diseases include CD40L, CD40, RAG1, RAG2, IL2RG, and ADA. Here is a summary of some methods utilized to identify genetic anomalies: Sanger Sequencing of Single Genes: Sanger sequencing is widely recognized as the benchmark method for accurately identifying individual nucleotide changes, as well as small-scale insertions or deletions in DNA. It is particularly valuable for confirming known familial genetic variations, for validating findings from next-generation sequencing technologies, and in specific scenarios that require sequencing of single genes. An example is its use to confirm mutations in the Bruton tyrosine kinase (BTK) gene, which are linked to X-linked agammaglobulinemia (XLA) • Targeted Gene Sequencing Panels (tNGS): This technology is ideal for examining genes in specific pathways or for follow-up experiments (targeted resequencing) from whole genome sequencing (WGS). It is rapid and more cost-effective than WGS, and because it allows for deeper sequencing. • Whole Exome Sequencing (WES): is a commonly used method which captures the majority of coding regions of the genome for sequencing, as these regions contain the majority of disease-causing mutations Useful for identifying mutations in specific genes • Trio or Whole-Family Analyses: In some cases, analyzing the DNA of the patient, parents, and siblings (trio analysis) or the entire family (whole-family analysis) can reveal inheritance patterns and identify causative mutations
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Medical History and Physical Examination: A physician will inquire about past illnesses and family history of immune disorders to identify inherited conditions.
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Prognosis depends greatly on the nature and severity of the condition. Some deficiencies cause early mortality (before age one), others with or even without treatment are lifelong conditions that cause little mortality or morbidity. Newer stem cell transplant technologies may lead to gene based
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is useful in those who are immunocompromised. In the early 1950s Immunoglobulin(Ig) was used by doctors to treat patients with primary immunodeficiency through intramuscular injection. Ig replacement therapy are infusions that can be either subcutaneous or intravenously administered, resulting in
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There are a large number of immunodeficiency syndromes that present clinical and laboratory characteristics of autoimmunity. The decreased ability of the immune system to clear infections in these patients may be responsible for causing autoimmunity through perpetual immune system activation. One
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The distinction between primary versus secondary immunodeficiencies is based on, respectively, whether the cause originates in the immune system itself or is, in turn, due to insufficiency of a supporting component of it or an external decreasing factor of it.
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Lee, Ainsley Ryan Yan Bin; Wong, Shi Yin; Chai, Louis Yi Ann; Lee, Soo Chin; Lee, Matilda Xinwei; Muthiah, Mark Dhinesh; Tay, Sen Hee; Teo, Chong Boon; Tan, Benjamin Kye Jyn; Chan, Yiong Huak; Sundar, Raghav; Soon, Yu Yang (2 March 2022).
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The cause of immunodeficiency varies depending on the nature of the disorder. The cause can be either genetic or acquired by malnutrition and poor sanitary conditions. Only for some genetic causes, the exact genes are known.
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are thought to be responsible. In addition to chronic and/or recurrent infections many autoimmune diseases including arthritis, autoimmune hemolytic anemia, scleroderma and type 1 diabetes are also seen in
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treatments of debilitating and fatal genetic immune deficiencies. Prognosis of acquired immune deficiencies depends on avoiding or treating the causative agent or condition (like AIDS).
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is compromised or entirely absent. Most cases are acquired ("secondary") due to extrinsic factors that affect the patient's immune system. Examples of these extrinsic factors include
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The treatment of primary immunodeficiencies depends on the nature of the defect, and may involve antibody infusions, long-term antibiotics and (in some cases)
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Various hormonal and metabolic disorders can also result in immune deficiency including anemia, hypothyroidism and hyperglycemia.
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generally refers to both beneficial and potential adverse effects of decreasing the function of the immune system, while the term
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Zbinden, Delphine; Manuel, Oriol (February 2014). "Influenza vaccination in immunocompromised patients: efficacy and safety".
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from childhood onward. Primary Immunodeficiency is also known as congenital immunodeficiencies. Many of these disorders are
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Gleeson, Michael; Nieman, David C; Pedersen, Bente K (January 2004). "Exercise, nutrition and immune function".
3001: 2871: 2743: 2495: 976: 46: 3342: 3302: 3248: 3099: 2587: 2438: 1098: 1046: 567: 326: 57: 2738: 1066: 1045:(XLA). Recurrent bacterial and fungal infections and chronic inflammation of the gut and lungs are seen in 1504:
Brigden ML (February 2001). "Detection, education and management of the asplenic or hyposplenic patient".
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Meidani, Mohsen; Naeini, Alireza Emami; Rostami, Mojtaba; Sherkat, Roya; Tayeri, Katayoun (March 2014).
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ones. They are also more susceptible to infectious diseases owing to the reduced protection afforded by
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Heavy schedules of training and competition in athletes increases their risk of immune deficiencies.
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are commonly seen in these patients. Presence of multiple uncleared viral infections due to lack of
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Available treatment falls into two modalities: treating infections and boosting the immune system.
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Many specific diseases directly or indirectly cause immunosuppression. This includes many types of
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Secondary immunodeficiencies, also known as acquired immunodeficiencies, can result from various
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In reality, immunodeficiency often affects multiple components, with notable examples including
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higher Ig levels for about three to four weeks, although this varies with each patient.
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Rosen FS, Cooper MD, Wedgwood RJ (August 1995). "The primary immunodeficiencies".
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Charles A Janeway, Jr; Travers, Paul; Walport, Mark; Shlomchik, Mark J. (2001).
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generally refers solely to the adverse effect of increased risk for infection.
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Basic Immunology: Functions and Disorders of the Immune System, 3rd Ed. 2011.
1173: 920: 525: 226: 171: 1328: 911:), and certain chronic infections. Immunodeficiency is also the hallmark of 3190: 3185: 3169: 3078: 3048: 2952: 2764: 2395: 2380: 2375: 2312: 2210: 2008: 1938: 1887: 1787: 1719: 1634: 1517: 1381: 1346: 1296: 1233: 1025: 855: 827: 819: 766: 599: 585: 556: 1564: 3257: 3244: 3151: 3089: 1806: 879: 790: 782: 638: 615: 544: 396: 322: 306: 1837:"Overview of Immunodeficiency Disorders. Merck Manuals Consumer Version" 1732: 3290: 3229: 3199: 3122: 3060: 2957: 2918: 2518: 2271: 2177: 2117: 1373: 1178: 1162: 1054: 1024:, an autosomal recessive primary immunodeficiency, is another example. 979: in this section. Unsourced material may be challenged and removed. 786: 687: 253: 152: 145: 2033: 3262: 2576: 2281: 2176: 2093: 1143: 1026:
Low blood levels of red blood cells, white blood cells, and platelets
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or the intended purpose of the treatment. Examples of such use is in
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If not otherwise specified in boxes, then reference for entries is:
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Smoking, alcoholism and drug abuse also depress immune response.
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measure and in patients with an overactive immune system, as in
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Stern A, Green H, Paul M, Vidal L, Leibovici L (October 2014).
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A person who has an immunodeficiency of any kind is said to be
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autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy
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Comparison of immunodeficiencies by affected component
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von Hardenberg, Sandra; Klefenz; Steinemann (2024).
1802:"Primary immunodeficiency - Diagnosis and treatment" 944: 1972: 1542: 49:. Unsourced material may be challenged and removed. 1529: 1527: 209:by some drugs, such as steroids, can either be an 1751: 3403: 1461: 1140:, immune response to harmless non-self proteins 1524: 1433: 1431: 1429: 803: 1900: 1682:Bourke CD, Berkley JA, Prendergast AJ (2016). 1499: 1497: 1495: 1493: 1309: 1204:The Journal of Allergy and Clinical Immunology 919:(HIV). HIV directly infects a small number of 3028: 2603: 2162: 1414:Schwartz RA (2019-10-22). Jyonouchi H (ed.). 1359: 1197: 1472:Jones J, Bannister BA, Gillespie SH (2006). 1443:Jones J, Bannister BA, Gillespie SH (2006). 1426: 248:that could affect anyone. It also decreases 1979:The Cochrane Database of Systematic Reviews 1752:Grammatikos AP, Tsokos GC (February 2012). 1490: 1407: 1191: 1051:nicotinamide adenine dinucleotide phosphate 1022:Familial hemophagocytic lymphohistiocytosis 754: 295:, often causes secondary disorders such as 3035: 3021: 2828:Purine nucleoside phosphorylase deficiency 2676:Transient hypogammaglobulinemia of infancy 2610: 2596: 2169: 2155: 2142:The European Society of Immunodeficiencies 194:. Immunocompromisation may also be due to 1998: 1957: 1928: 1918: 1877: 1867: 1777: 1709: 1699: 1336: 1286: 1223: 995:Learn how and when to remove this message 109:Learn how and when to remove this message 3166: 1413: 268: 1503: 1399:. University of Toronto. Archived from 1275:Journal of Research in Medical Sciences 769:feature a heightened susceptibility to 745: 377:Main pathogens of resultant infections 135:Immunocompromisation, immune deficiency 3404: 3325:Neutrophil-specific granule deficiency 3226: 3119: 2992:Terminal complement pathway deficiency 1474:Infection: Microbiology and Management 1445:Infection: Microbiology and Management 1198:Chinen J, Shearer WT (February 2010). 3016: 2591: 2150: 1834: 1735:"Inherited immunodeficiency diseases" 1584: 1582: 1394: 832:disease-modifying antirheumatic drugs 3348:Neutrophil immunodeficiency syndrome 977:adding citations to reliable sources 948: 658:Polysaccharide encapsulated bacteria 335:, where there is no function of the 47:adding citations to reliable sources 18: 16:Lack of or compromised immune system 2997:Paroxysmal nocturnal hemoglobinuria 1545:The New England Journal of Medicine 1161:, commonly administered drugs like 1121:Acquired immune deficiency syndrome 1034:enlargement of the liver and spleen 358:acquired immune deficiency syndrome 297:acquired immune deficiency syndrome 13: 1579: 1155:, age-associated immune deficiency 1134:, immune response to self-proteins 1020:, and autoimmune thyroid disease. 913:acquired immunodeficiency syndrome 14: 3423: 2019: 945:Immunodeficiency and autoimmunity 305:, including decreased numbers of 3389: 3377: 3241:Granulocytopenia/agranulocytosis 2760:Common variable immunodeficiency 1903:"Pediatric Immunology Volume 12" 1063:granulomatosis with polyangiitis 1010:common variable immunodeficiency 953: 826:, particular medications (e.g., 354:severe combined immunodeficiency 23: 2932:Idiopathic CD4+ lymphocytopenia 1966: 1945: 1901:von Hardenberg, Sandra (2024). 1894: 1843: 1828: 1824:. Immune Deficiency Foundation. 1814: 1794: 1745: 1726: 1675: 1649: 1606: 1536: 1281:(Suppl 1): S71–S73pmc=4078380. 1165:that suppress the immune system 964:needs additional citations for 34:needs additional citations for 3002:Complement receptor deficiency 2872:Adenosine deaminase deficiency 2496:Immunoglobulin class switching 1991:10.1002/14651858.CD005590.pub3 1590:"Immune Deficiency Foundation" 1388: 1353: 1303: 1262: 1250:. Mayo Clinic. 30 January 2020 1240: 1: 3343:Chronic granulomatous disease 3303:Leukocyte adhesion deficiency 3249:Severe congenital neutropenia 3100:Chronic granulomatous disease 2900: 1441:, Chapter 22, Table 22.1 in: 1184: 1099:trimethoprim/sulfamethoxazole 1059:midline granulomatous disease 1047:chronic granulomatous disease 568:chronic granulomatous disease 344:is where the function of the 327:chronic granulomatous disease 2137:Immune Deficiency Foundation 1770:10.1016/j.molmed.2011.10.005 1758:Trends in Molecular Medicine 1105: 1085: 1076: 917:human immunodeficiency virus 882:. For medications, the term 804:Secondary immunodeficiencies 7: 2671:X-linked agammaglobulinemia 1627:10.1080/0264041031000140590 1557:10.1056/NEJM199508173330707 1114: 1043:X-linked agammaglobulinemia 562:Bone marrow transplantation 10: 3428: 3353:Myeloperoxidase deficiency 3195:Hypereosinophilic syndrome 2325:Polyclonal B cell response 1959:10.1186/s12920-020-00743-8 1615:Journal of Sports Sciences 1248:"Primary immunodeficiency" 1216:10.1016/j.jaci.2009.08.040 1014:inflammatory bowel disease 807: 758: 170:, is a state in which the 3333: 3289: 3280: 3219: 3159: 3150: 3112: 3075: 3068: 3055: 2940: 2917: 2899: 2847: 2777: 2752: 2684: 2661: 2642: 2633: 2559: 2517: 2459: 2360: 2290: 2198: 2191: 2108: 2027: 1920:10.3389/fped.2024.1279112 1869:10.3389/fped.2024.1279112 1506:American Family Physician 1169:Human genetic enhancement 1065:and NK/T cell lymphomas. 935: 798:stem cell transplantation 418:Chronic lymphoid leukemia 383:Humoral immune deficiency 275:Humoral immune deficiency 250:cancer immunosurveillance 151: 139: 131: 126: 3320:ChĂ©diak–Higashi syndrome 3282:Disorder of phagocytosis 2887:Bare lymphocyte syndrome 2739:Wiskott–Aldrich syndrome 1701:10.1016/j.it.2016.04.003 1657:"Nutrition and Immunity" 1067:Wiskott–Aldrich syndrome 761:Primary immunodeficiency 755:Primary immunodeficiency 735:Streptococcus pneumoniae 665:Streptococcus pneumoniae 433:Streptococcus pneumoniae 263: 244:, in addition to normal 242:opportunistic infections 231:primary immunodeficiency 2987:Complement 3 deficiency 2972:Complement 4 deficiency 2968:Complement 2 deficiency 1907:Frontiers in Pediatrics 1856:Frontiers in Pediatrics 1329:10.1136/bmj-2021-068632 1210:(2 Suppl 2): S195–203. 836:immunosuppressive drugs 718:Congenital deficiencies 550:Neutrophil granulocytes 515:Intracellular pathogens 356:(which is primary) and 319:neutrophil granulocytes 2439:Tolerance in pregnancy 2181:adaptive immune system 1095:Pneumocystis pneumonia 1030:lymph node enlargement 915:(AIDS), caused by the 679:Neisseria meningitidis 672:Haemophilus influenzae 593:Pseudomonas aeruginosa 461:Cryptosporidium parvum 447:Pneumocystis jirovecii 360:(which is secondary). 303:Granulocyte deficiency 283:respiratory infections 205:In clinical settings, 2962:Hereditary angioedema 2818:Ataxia–telangiectasia 2663:Hypogammaglobulinemia 2474:Somatic hypermutation 2308:Polyclonal antibodies 2303:Monoclonal antibodies 818:agents, for example, 808:Further information: 707:Complement deficiency 566:Dysfunction, such as 440:Hemophilus influenzae 342:Complement deficiency 279:hypogammaglobulinemia 269:By affected component 188:environmental factors 2982:Properdin deficiency 2803:Di George's syndrome 2686:Dysgammaglobulinemia 2491:Junctional diversity 2259:Antigen presentation 1688:Trends in Immunology 1661:The Nutrition Source 973:improve this article 848:environmental toxins 746:Primary or secondary 535:, and intracellular 520:Herpes simplex virus 454:Giardia intestinalis 174:'s ability to fight 168:immunocompromisation 43:improve this article 2486:V(D)J recombination 2469:Affinity maturation 2221:Antigenic variation 1512:(3): 499–506, 508. 1476:. Wiley-Blackwell. 1447:. Wiley-Blackwell. 1053:(NADPH) oxidase by 779:autosomal recessive 497:Cancer chemotherapy 371:Affected components 365: 223:autoimmune diseases 217:surgery as an anti- 176:infectious diseases 3253:Cyclic neutropenia 2834:Hyper IgM syndrome 2744:Hyper-IgE syndrome 2709:Hyper IgM syndrome 2625:disorders causing 2109:External resources 1835:FERNANDEZ, JAMES. 1822:"Laboratory tests" 1741:. Garland Science. 1416:"T-cell Disorders" 1397:"Immunodeficiency" 1374:10.2217/imt.13.171 1132:Autoimmune disease 649:Sickle-cell anemia 578:Enterobacteriaceae 363: 287:agammaglobulinemia 58:"Immunodeficiency" 3365: 3364: 3361: 3360: 3335:Respiratory burst 3276: 3275: 3272: 3271: 3215: 3214: 3146: 3145: 3142: 3141: 3108: 3107: 3010: 3009: 2895: 2894: 2794:thymic hypoplasia 2779:T cell deficiency 2773: 2772: 2585: 2584: 2513: 2512: 2263:professional APCs 2132: 2131: 1594:primaryimmune.org 1483:978-1-4051-2665-6 1454:978-1-4051-2665-6 1005: 1004: 997: 885:immunosuppression 840:organ transplants 816:immunosuppressive 810:Immunosuppression 743: 742: 712:Complement system 537:fungal infections 471:T cell deficiency 387:B cell deficiency 346:complement system 293:T cell deficiency 238:immunocompromised 207:immunosuppression 161: 160: 121:Medical condition 119: 118: 111: 93: 3419: 3412:Immunodeficiency 3394: 3393: 3392: 3382: 3381: 3373: 3287: 3286: 3234: 3224: 3223: 3174: 3164: 3163: 3157: 3156: 3127: 3117: 3116: 3083: 3073: 3072: 3066: 3065: 3037: 3030: 3023: 3014: 3013: 2882:ZAP70 deficiency 2813:Nezelof syndrome 2659: 2658: 2640: 2639: 2627:immunodeficiency 2612: 2605: 2598: 2589: 2588: 2479:Clonal selection 2451:Immune privilege 2446:Immunodeficiency 2401:Cross-reactivity 2391:Hypersensitivity 2196: 2195: 2171: 2164: 2157: 2148: 2147: 2123:Immunodeficiency 2025: 2024: 2013: 2012: 2002: 1985:(10): CD005590. 1970: 1964: 1963: 1961: 1949: 1943: 1942: 1932: 1922: 1898: 1892: 1891: 1881: 1871: 1847: 1841: 1840: 1832: 1826: 1825: 1818: 1812: 1811: 1798: 1792: 1791: 1781: 1749: 1743: 1742: 1730: 1724: 1723: 1713: 1703: 1679: 1673: 1672: 1670: 1668: 1653: 1647: 1646: 1610: 1604: 1603: 1601: 1600: 1586: 1577: 1576: 1540: 1534: 1531: 1522: 1521: 1501: 1488: 1487: 1465: 1459: 1458: 1435: 1424: 1423: 1411: 1405: 1404: 1403:on 10 July 2013. 1392: 1386: 1385: 1357: 1351: 1350: 1340: 1307: 1301: 1300: 1290: 1266: 1260: 1259: 1257: 1255: 1244: 1238: 1237: 1227: 1195: 1153:Immunosenescence 1018:thrombocytopenia 1000: 993: 989: 986: 980: 957: 949: 909:multiple myeloma 890:immunodeficiency 660:, particularly: 413:Multiple myeloma 366: 362: 311:granulocytopenia 215:organ transplant 196:genetic diseases 166:, also known as 164:Immunodeficiency 127:Immunodeficiency 124: 123: 114: 107: 103: 100: 94: 92: 51: 27: 19: 3427: 3426: 3422: 3421: 3420: 3418: 3417: 3416: 3402: 3401: 3400: 3390: 3388: 3376: 3368: 3366: 3357: 3329: 3268: 3227: 3211: 3167: 3138: 3120: 3104: 3076: 3051: 3041: 3011: 3006: 2943: 2936: 2924:Lymphocytopenia 2922: 2913: 2891: 2867: 2854: 2843: 2799:hypoparathyroid 2781: 2769: 2748: 2680: 2650: 2629: 2616: 2586: 2581: 2555: 2509: 2455: 2434:Clonal deletion 2362: 2356: 2286: 2187: 2175: 2133: 2128: 2127: 2104: 2103: 2036: 2022: 2017: 2016: 1971: 1967: 1951: 1950: 1946: 1899: 1895: 1848: 1844: 1833: 1829: 1820: 1819: 1815: 1800: 1799: 1795: 1750: 1746: 1731: 1727: 1680: 1676: 1666: 1664: 1655: 1654: 1650: 1611: 1607: 1598: 1596: 1588: 1587: 1580: 1541: 1537: 1532: 1525: 1502: 1491: 1484: 1466: 1462: 1455: 1436: 1427: 1412: 1408: 1393: 1389: 1358: 1354: 1308: 1304: 1267: 1263: 1253: 1251: 1246: 1245: 1241: 1196: 1192: 1187: 1127:Immune disorder 1117: 1108: 1088: 1079: 1001: 990: 984: 981: 970: 958: 947: 938: 872:dichlorobenzene 844:glucocorticoids 812: 806: 763: 757: 748: 487:transplantation 408:Primary humoral 315:agranulocytosis 313:or, if absent, 271: 266: 198:/flaws such as 122: 115: 104: 98: 95: 52: 50: 40: 28: 17: 12: 11: 5: 3425: 3415: 3414: 3399: 3398: 3386: 3363: 3362: 3359: 3358: 3356: 3355: 3350: 3345: 3339: 3337: 3331: 3330: 3328: 3327: 3322: 3317: 3316: 3315: 3310: 3299: 3297: 3284: 3278: 3277: 3274: 3273: 3270: 3269: 3267: 3266: 3260: 3255: 3237: 3235: 3221: 3217: 3216: 3213: 3212: 3210: 3209: 3208: 3207: 3202: 3197: 3188: 3181:granulocytosis 3177: 3175: 3161: 3154: 3148: 3147: 3144: 3143: 3140: 3139: 3137: 3136: 3130: 3128: 3114: 3110: 3109: 3106: 3105: 3103: 3102: 3097: 3092: 3086: 3084: 3070: 3063: 3053: 3052: 3040: 3039: 3032: 3025: 3017: 3008: 3007: 3005: 3004: 2999: 2994: 2989: 2984: 2979: 2977:MBL deficiency 2974: 2965: 2948: 2946: 2938: 2937: 2935: 2934: 2928: 2926: 2915: 2914: 2912: 2911: 2905: 2903: 2897: 2896: 2893: 2892: 2890: 2889: 2884: 2879: 2877:Omenn syndrome 2874: 2858: 2856: 2845: 2844: 2842: 2841: 2822: 2821: 2815: 2806: 2789: 2787: 2775: 2774: 2771: 2770: 2768: 2767: 2762: 2756: 2754: 2750: 2749: 2747: 2746: 2741: 2736: 2730: 2725: 2720: 2715: 2706: 2704:IgM deficiency 2701: 2699:IgG deficiency 2696: 2694:IgA deficiency 2690: 2688: 2682: 2681: 2679: 2678: 2673: 2667: 2665: 2656: 2637: 2631: 2630: 2615: 2614: 2607: 2600: 2592: 2583: 2582: 2580: 2579: 2574: 2569: 2563: 2561: 2557: 2556: 2554: 2553: 2548: 2547: 2546: 2536: 2535: 2534: 2523: 2521: 2515: 2514: 2511: 2510: 2508: 2507: 2498: 2493: 2488: 2483: 2482: 2481: 2476: 2465: 2463: 2461:Immunogenetics 2457: 2456: 2454: 2453: 2448: 2443: 2442: 2441: 2436: 2431: 2426: 2421: 2409: 2408: 2406:Co-stimulation 2403: 2398: 2393: 2388: 2383: 2378: 2373: 2366: 2364: 2358: 2357: 2355: 2354: 2349: 2347:Immune complex 2343: 2342: 2337: 2332: 2327: 2322: 2321: 2320: 2315: 2310: 2305: 2294: 2292: 2288: 2287: 2285: 2284: 2279: 2274: 2269: 2267:Dendritic cell 2255: 2254: 2249: 2248: 2247: 2245:Conformational 2242: 2231: 2230: 2225: 2224: 2223: 2218: 2213: 2202: 2200: 2193: 2189: 2188: 2174: 2173: 2166: 2159: 2151: 2145: 2144: 2139: 2130: 2129: 2126: 2125: 2113: 2112: 2110: 2106: 2105: 2102: 2101: 2090: 2079: 2068: 2053: 2037: 2032: 2031: 2029: 2028:Classification 2021: 2020:External links 2018: 2015: 2014: 1965: 1944: 1893: 1842: 1827: 1813: 1793: 1744: 1725: 1694:(6): 386–398. 1674: 1648: 1621:(1): 115–125. 1605: 1578: 1535: 1523: 1489: 1482: 1460: 1453: 1425: 1406: 1387: 1368:(2): 131–139. 1352: 1302: 1261: 1239: 1189: 1188: 1186: 1183: 1182: 1181: 1176: 1171: 1166: 1156: 1150: 1149: 1148: 1147: 1146: 1135: 1124: 1116: 1113: 1107: 1104: 1093:Prevention of 1087: 1084: 1078: 1075: 1003: 1002: 961: 959: 952: 946: 943: 937: 934: 921:T helper cells 864:petrochemicals 805: 802: 759:Main article: 756: 753: 747: 744: 741: 740: 739: 738: 731: 721: 720: 719: 714: 709: 703: 702: 701: 700: 692: 684: 683: 682: 675: 668: 653: 652: 651: 646: 641: 634: 629: 623: 622: 621: 620: 612: 604: 596: 589: 581: 572: 571: 570: 564: 559: 552: 547: 541: 540: 512: 511: 510: 507:Glucocorticoid 504: 499: 494: 489: 478: 473: 467: 466: 465: 464: 457: 450: 443: 436: 427: 426: 425: 420: 415: 410: 403: 390: 379: 378: 375: 372: 369: 350: 349: 339: 330: 300: 290: 270: 267: 265: 262: 211:adverse effect 186:infection and 159: 158: 155: 149: 148: 143: 137: 136: 133: 129: 128: 120: 117: 116: 31: 29: 22: 15: 9: 6: 4: 3: 2: 3424: 3413: 3410: 3409: 3407: 3397: 3387: 3385: 3380: 3375: 3374: 3371: 3354: 3351: 3349: 3346: 3344: 3341: 3340: 3338: 3336: 3332: 3326: 3323: 3321: 3318: 3314: 3311: 3309: 3306: 3305: 3304: 3301: 3300: 3298: 3296: 3295:degranulation 3292: 3288: 3285: 3283: 3279: 3264: 3261: 3259: 3256: 3254: 3250: 3246: 3242: 3239: 3238: 3236: 3233: 3231: 3225: 3222: 3218: 3206: 3203: 3201: 3198: 3196: 3192: 3189: 3187: 3184: 3183: 3182: 3179: 3178: 3176: 3173: 3171: 3165: 3162: 3158: 3155: 3153: 3149: 3135: 3134:Monocytopenia 3132: 3131: 3129: 3126: 3124: 3118: 3115: 3111: 3101: 3098: 3096: 3095:Histiocytosis 3093: 3091: 3088: 3087: 3085: 3082: 3080: 3074: 3071: 3067: 3064: 3062: 3058: 3054: 3050: 3046: 3038: 3033: 3031: 3026: 3024: 3019: 3018: 3015: 3003: 3000: 2998: 2995: 2993: 2990: 2988: 2985: 2983: 2980: 2978: 2975: 2973: 2969: 2966: 2963: 2959: 2955: 2954: 2950: 2949: 2947: 2945: 2939: 2933: 2930: 2929: 2927: 2925: 2920: 2916: 2910: 2907: 2906: 2904: 2902: 2898: 2888: 2885: 2883: 2880: 2878: 2875: 2873: 2870: 2866: 2863: 2860: 2859: 2857: 2853: 2850: 2846: 2839: 2835: 2832: 2831: 2830: 2829: 2826: 2819: 2816: 2814: 2810: 2809:euparathyroid 2807: 2804: 2800: 2797: 2795: 2791: 2790: 2788: 2785: 2780: 2776: 2766: 2763: 2761: 2758: 2757: 2755: 2751: 2745: 2742: 2740: 2737: 2734: 2731: 2729: 2726: 2724: 2721: 2719: 2716: 2714: 2710: 2707: 2705: 2702: 2700: 2697: 2695: 2692: 2691: 2689: 2687: 2683: 2677: 2674: 2672: 2669: 2668: 2666: 2664: 2660: 2657: 2654: 2649: 2645: 2641: 2638: 2636: 2632: 2628: 2624: 2620: 2613: 2608: 2606: 2601: 2599: 2594: 2593: 2590: 2578: 2575: 2573: 2570: 2568: 2565: 2564: 2562: 2558: 2552: 2549: 2545: 2542: 2541: 2540: 2537: 2533: 2530: 2529: 2528: 2525: 2524: 2522: 2520: 2516: 2506: 2502: 2499: 2497: 2494: 2492: 2489: 2487: 2484: 2480: 2477: 2475: 2472: 2471: 2470: 2467: 2466: 2464: 2462: 2458: 2452: 2449: 2447: 2444: 2440: 2437: 2435: 2432: 2430: 2429:Clonal anergy 2427: 2425: 2422: 2420: 2417: 2416: 2415: 2411: 2410: 2407: 2404: 2402: 2399: 2397: 2394: 2392: 2389: 2387: 2384: 2382: 2379: 2377: 2374: 2372: 2368: 2367: 2365: 2359: 2353: 2350: 2348: 2345: 2344: 2341: 2338: 2336: 2333: 2331: 2328: 2326: 2323: 2319: 2318:Microantibody 2316: 2314: 2311: 2309: 2306: 2304: 2301: 2300: 2299: 2296: 2295: 2293: 2289: 2283: 2280: 2278: 2275: 2273: 2270: 2268: 2264: 2260: 2257: 2256: 2253: 2250: 2246: 2243: 2241: 2238: 2237: 2236: 2233: 2232: 2229: 2226: 2222: 2219: 2217: 2214: 2212: 2209: 2208: 2207: 2204: 2203: 2201: 2197: 2194: 2190: 2186: 2182: 2179: 2172: 2167: 2165: 2160: 2158: 2153: 2152: 2149: 2143: 2140: 2138: 2135: 2134: 2124: 2120: 2119: 2115: 2114: 2111: 2107: 2100: 2096: 2095: 2091: 2089: 2085: 2084: 2080: 2078: 2074: 2073: 2069: 2067: 2063: 2062: 2058: 2054: 2052: 2048: 2047: 2043: 2039: 2038: 2035: 2030: 2026: 2010: 2006: 2001: 1996: 1992: 1988: 1984: 1980: 1976: 1969: 1960: 1955: 1948: 1940: 1936: 1931: 1926: 1921: 1916: 1912: 1908: 1904: 1897: 1889: 1885: 1880: 1875: 1870: 1865: 1861: 1857: 1853: 1846: 1838: 1831: 1823: 1817: 1809: 1808: 1803: 1797: 1789: 1785: 1780: 1775: 1771: 1767: 1763: 1759: 1755: 1748: 1740: 1739:Immunobiology 1736: 1729: 1721: 1717: 1712: 1707: 1702: 1697: 1693: 1689: 1685: 1678: 1662: 1658: 1652: 1644: 1640: 1636: 1632: 1628: 1624: 1620: 1616: 1609: 1595: 1591: 1585: 1583: 1574: 1570: 1566: 1562: 1558: 1554: 1551:(7): 431–40. 1550: 1546: 1539: 1530: 1528: 1519: 1515: 1511: 1507: 1500: 1498: 1496: 1494: 1485: 1479: 1475: 1469: 1464: 1456: 1450: 1446: 1440: 1434: 1432: 1430: 1421: 1417: 1410: 1402: 1398: 1395:Greenberg S. 1391: 1383: 1379: 1375: 1371: 1367: 1363: 1362:Immunotherapy 1356: 1348: 1344: 1339: 1334: 1330: 1326: 1322: 1318: 1314: 1306: 1298: 1294: 1289: 1284: 1280: 1276: 1272: 1265: 1249: 1243: 1235: 1231: 1226: 1221: 1217: 1213: 1209: 1205: 1201: 1194: 1190: 1180: 1177: 1175: 1174:Immune system 1172: 1170: 1167: 1164: 1160: 1157: 1154: 1151: 1145: 1142: 1141: 1139: 1136: 1133: 1130: 1129: 1128: 1125: 1122: 1119: 1118: 1112: 1103: 1100: 1096: 1091: 1083: 1074: 1072: 1068: 1064: 1060: 1056: 1052: 1048: 1044: 1039: 1035: 1031: 1027: 1023: 1019: 1016:, autoimmune 1015: 1011: 999: 996: 988: 985:November 2016 978: 974: 968: 967: 962:This section 960: 956: 951: 950: 942: 933: 930: 927: 924: 922: 918: 914: 910: 906: 902: 898: 893: 891: 887: 886: 881: 877: 873: 869: 865: 861: 857: 853: 849: 845: 841: 837: 833: 829: 825: 821: 817: 811: 801: 799: 794: 792: 788: 784: 780: 776: 772: 768: 767:rare diseases 762: 752: 737: 736: 732: 729: 728: 724: 723: 722: 717: 716: 715: 713: 710: 708: 705: 704: 698: 697: 693: 690: 689: 685: 681: 680: 676: 674: 673: 669: 667: 666: 662: 661: 659: 656: 655: 654: 650: 647: 645: 642: 640: 637: 636: 635: 633: 630: 628: 625: 624: 618: 617: 613: 610: 609: 605: 602: 601: 597: 595: 594: 590: 588: 587: 582: 580: 579: 575: 574: 573: 569: 565: 563: 560: 558: 555: 554: 553: 551: 548: 546: 543: 542: 538: 534: 533: 528: 527: 526:Mycobacterium 522: 521: 516: 513: 508: 505: 503: 500: 498: 495: 493: 490: 488: 484: 481: 480: 479: 477: 474: 472: 469: 468: 463: 462: 458: 456: 455: 451: 449: 448: 444: 442: 441: 437: 435: 434: 430: 429: 428: 424: 421: 419: 416: 414: 411: 409: 406: 405: 404: 402: 398: 394: 391: 389: 388: 384: 381: 380: 376: 373: 370: 368: 367: 361: 359: 355: 347: 343: 340: 338: 334: 331: 328: 324: 320: 317:) such as of 316: 312: 308: 304: 301: 298: 294: 291: 288: 284: 280: 276: 273: 272: 261: 259: 255: 251: 247: 243: 239: 234: 232: 228: 227:immune system 224: 220: 216: 212: 208: 203: 201: 197: 193: 189: 185: 181: 177: 173: 172:immune system 169: 165: 156: 154: 150: 147: 144: 142: 138: 134: 130: 125: 113: 110: 102: 99:November 2007 91: 88: 84: 81: 77: 74: 70: 67: 63: 60: â€“  59: 55: 54:Find sources: 48: 44: 38: 37: 32:This article 30: 26: 21: 20: 3228: 3191:Eosinophilia 3186:Neutrophilia 3168: 3152:Granulocytes 3121: 3077: 3049:granulocytes 3043:Diseases of 2953:C1-inhibitor 2951: 2868: 2861: 2824: 2823: 2808: 2798: 2792: 2765:ICF syndrome 2626: 2445: 2396:Inflammation 2381:Alloimmunity 2376:Autoimmunity 2361:Immunity vs. 2313:Autoantibody 2211:Superantigen 2116: 2092: 2081: 2070: 2055: 2040: 1982: 1978: 1968: 1947: 1910: 1906: 1896: 1859: 1855: 1845: 1830: 1816: 1805: 1796: 1764:(2): 101–8. 1761: 1757: 1747: 1738: 1728: 1691: 1687: 1677: 1665:. Retrieved 1660: 1651: 1618: 1614: 1608: 1597:. Retrieved 1593: 1548: 1544: 1538: 1509: 1505: 1473: 1463: 1444: 1419: 1409: 1401:the original 1390: 1365: 1361: 1355: 1320: 1316: 1305: 1278: 1274: 1264: 1252:. Retrieved 1242: 1207: 1203: 1193: 1109: 1092: 1089: 1080: 1006: 991: 982: 971:Please help 966:verification 963: 939: 931: 928: 925: 894: 889: 883: 856:heavy metals 828:chemotherapy 820:malnutrition 813: 795: 791:granulocytes 765:A number of 764: 749: 733: 725: 694: 686: 677: 670: 663: 614: 606: 600:Enterococcus 598: 591: 586:Streptococci 584: 576: 557:Chemotherapy 530: 524: 518: 517:, including 459: 452: 445: 438: 431: 397:plasma cells 385: 351: 348:is deficient 307:granulocytes 302: 237: 235: 204: 167: 163: 162: 105: 96: 86: 79: 72: 65: 53: 41:Please help 36:verification 33: 3258:Eosinopenia 3245:Neutropenia 3090:Monocytosis 3061:macrophages 2825:peripheral: 2519:Lymphocytes 2178:Lymphocytic 1807:Mayo Clinic 1323:: e068632. 1055:neutrophils 1008:example is 880:ethylphenol 787:lymphocytes 639:Splenectomy 616:Aspergillus 545:Neutropenia 374:Main causes 323:neutropenia 309:(called as 132:Other names 3291:Chemotaxis 3200:Basophilia 2958:Angioedema 2944:deficiency 2942:Complement 2919:Leukopenia 2869:autosomal: 2623:complement 2560:Substances 2424:Peripheral 2412:Inaction: 2291:Antibodies 2272:Macrophage 2185:complement 2118:Patient UK 2083:DiseasesDB 1667:8 November 1599:2017-04-17 1185:References 1179:Immunology 1163:prednisone 1028:, rashes, 860:pesticides 854:and other 775:hereditary 771:infections 688:Plasmodium 485:and other 401:antibodies 254:neoplastic 246:infections 190:, such as 153:Medication 146:Immunology 69:newspapers 3263:Basopenia 3057:Monocytes 3045:monocytes 2862:x-linked: 2577:Cytolysin 2567:Cytokines 2414:Tolerance 2363:tolerance 2282:Immunogen 2099:234532001 2094:SNOMED CT 1144:Histamine 1106:Prognosis 1086:Treatment 1077:Diagnosis 727:Neisseria 285:, and/or 219:rejection 192:nutrition 141:Specialty 3406:Category 3396:Medicine 3205:Bandemia 3170:-cytosis 3079:-cytosis 2909:HIV/AIDS 2901:Acquired 2852:combined 2644:Antibody 2619:Lymphoid 2527:Cellular 2371:Immunity 2369:Action: 2352:Paratope 2340:Idiotype 2330:Allotype 2298:Antibody 2252:Mimotope 2216:Allergen 2199:Antigens 2192:Lymphoid 2009:25269391 1939:38659694 1930:11039790 1888:38659694 1879:11039790 1788:22177735 1720:27237815 1643:84378380 1635:14971437 1573:39699189 1518:11272299 1468:Page 435 1439:Page 432 1420:Medscape 1382:24491087 1347:35236664 1297:25002900 1234:20042227 1159:Steroids 1115:See also 1038:perforin 905:lymphoma 901:leukemia 783:X-linked 777:and are 627:Asplenia 532:Listeria 502:Lymphoma 333:Asplenia 321:(termed 258:vaccines 3384:Biology 3370:Portals 2648:humoral 2635:Primary 2572:Opsonin 2551:NK cell 2539:Humoral 2419:Central 2386:Allergy 2335:Isotype 2235:Epitope 2206:Antigen 2077:D007153 2000:6457644 1779:3278563 1711:4889773 1565:7616993 1338:8889026 1288:4078380 1225:6151868 1138:Allergy 868:styrene 852:mercury 730:species 699:species 696:Babesia 691:species 619:species 611:species 608:Candida 603:species 509:therapy 476:T cells 393:B cells 299:(AIDS). 83:scholar 3230:-penia 3123:-penia 2865:X-SCID 2849:Severe 2544:B cell 2532:T cell 2277:B cell 2240:Linear 2228:Hapten 2007:  1997:  1937:  1927:  1886:  1876:  1786:  1776:  1718:  1708:  1641:  1633:  1571:  1563:  1516:  1480:  1451:  1380:  1345:  1335:  1295:  1285:  1254:13 May 1232:  1222:  1123:(AIDS) 1097:using 1032:, and 936:Causes 897:cancer 878:, and 876:xylene 846:) and 838:after 644:Trauma 632:Spleen 483:Marrow 337:spleen 180:cancer 157:Imuran 85:  78:  71:  64:  56:  2855:(B+T) 2753:Other 2088:21506 2066:279.3 2051:D84.9 1639:S2CID 1569:S2CID 866:like 850:like 824:aging 583:Oral 264:Types 229:, or 90:JSTOR 76:books 3313:LAD2 3308:LAD1 3293:and 3059:and 3047:and 2621:and 2183:and 2072:MeSH 2061:9-CM 2005:PMID 1935:PMID 1884:PMID 1784:PMID 1716:PMID 1669:2020 1631:PMID 1561:PMID 1514:PMID 1478:ISBN 1470:in: 1449:ISBN 1378:PMID 1343:PMID 1293:PMID 1256:2020 1230:PMID 862:and 492:AIDS 423:AIDS 200:SCID 178:and 62:news 2505:HLA 2501:MHC 2057:ICD 2042:ICD 1995:PMC 1987:doi 1954:doi 1925:PMC 1915:doi 1874:PMC 1864:doi 1774:PMC 1766:doi 1706:PMC 1696:doi 1623:doi 1553:doi 1549:333 1370:doi 1333:PMC 1325:doi 1321:376 1317:BMJ 1283:PMC 1220:PMC 1212:doi 1208:125 975:by 789:or 781:or 399:or 184:HIV 45:by 3408:: 2265:: 2121:: 2097:: 2086:: 2075:: 2064:: 2049:: 2046:10 2003:. 1993:. 1983:10 1981:. 1977:. 1933:. 1923:. 1913:. 1911:12 1909:. 1905:. 1882:. 1872:. 1862:. 1860:12 1858:. 1854:. 1804:. 1782:. 1772:. 1762:18 1760:. 1756:. 1737:. 1714:. 1704:. 1692:37 1690:. 1686:. 1659:. 1637:. 1629:. 1619:22 1617:. 1592:. 1581:^ 1567:. 1559:. 1547:. 1526:^ 1510:63 1508:. 1492:^ 1428:^ 1418:. 1376:. 1364:. 1341:. 1331:. 1319:. 1315:. 1291:. 1279:19 1277:. 1273:. 1228:. 1218:. 1206:. 1202:. 907:, 903:, 874:, 870:, 858:, 842:, 834:, 830:, 822:, 793:. 539:. 529:, 523:, 395:, 260:. 233:. 202:. 3372:: 3265:) 3251:/ 3247:/ 3243:( 3232:: 3220:↓ 3193:/ 3172:: 3160:↑ 3125:: 3113:↓ 3081:: 3069:↑ 3036:e 3029:t 3022:v 2970:/ 2964:) 2960:/ 2956:( 2921:: 2840:) 2838:1 2836:( 2820:) 2811:( 2805:) 2801:( 2796:: 2786:) 2784:T 2782:( 2735:) 2733:5 2728:4 2723:3 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