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Ancylostoma duodenale

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where it matures. The larva later matures into an adult in the small intestine (jejunum mainly), where they attach to the villi and female worms can lay 25,000 eggs per day. The eggs are released into the feces and reside on soil; when deposited on warm, moist soil, a larva rapidly develops in the egg and hatches after one to two days. This rhabditiform larva moults twice in the soil and becomes a skin-penetrating third-stage infective larva within 5 to 10 days. These infective filariform larvae are able to sense vibrations in the soil, heat, or carbon dioxide, and employ dendritic processes similar to cilia. They use these processes as thermosensory, chemosensory, and mechanosensory receptors to migrate towards a host for infection. The filariform larvae (L3 stage) can then penetrate the exposed skin of another organism and begin a new cycle of infection.
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After a filariform "infective" larva penetrates the intact skin – most commonly through the feet – the larva enters the blood circulation. It is then carried to the lungs, breaks into alveoli, ascends the bronchi and trachea, and is coughed up and swallowed back into the small intestine,
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cannot be distinguished. Larvae cannot be found in stool specimens unless they are left at ambient temperature for a day or more. Education, improved sanitation, and controlled disposal of human feces are important. Wearing shoes in endemic areas can reduce the prevalence of infection, as well.
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is small, cylindrical worm, greyish-white in color. It has two ventral plates on the anterior margin of the buccal capsule. Each of them has two large teeth that are fused at their bases. A pair of small teeth can be found in the depths of the buccal capsule. Males are 8–11 mm long with a
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is prevalent in Southern Europe, North Africa, India, China, Southeast Asia, small areas of United States, the Caribbean islands, and South America. This hookworm is well known in mines because of the consistency in temperature and humidity that provides an ideal habitat for egg and juvenile
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copulatory bursa at the posterior end. Females are 10–13 mm long, with the vulva located at the posterior end; females can lay 10,000 to 30,000 eggs per day. The average lifespan of a female
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is abundant throughout the world, including Southern Europe, North Africa, India, China, Southeast Asia, some areas in the United States, the Caribbean, and South America.
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is one year. There are four larval stages, and the filariform larvae (L3) are sheathed because they retain the cuticle of the prior developmental stage after molting.
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can be treated with albendazole, mebendazole, and benzimidazoles. Pyrantel pamoate is an alternative. In severe cases of anemia, blood transfusion may be necessary.
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might result in mental dullness and heart failure. In pregnant women, this parasite is able to infect the fetus and can cause complications such as
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is by contact of skin with soil contaminated with larvae. The way it enters the human body was understood in the 1880s, after an epidemic of
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development. An estimated one billion people are infected with hookworms. Transmission of
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can also be transmitted orally, mediated by ingestion of the filariform larvae.
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Bogitsh BJ, Carter CE, Oeltmann TN (2013). "Chapter 16: Intestinal Nematodes".
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of hosts such as humans, cats and dogs, where it is able to mate and mature.
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Fetouh, Nagla (2003). Mulcrone, Renee Sherman; Friedrich, Teresa (eds.).
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Buccal capsule of adult showing four teeth (arrows) on its ventral wall
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Looss, A. (1898). "Zur Lebensgeschichte des Ankylostoma duodenale".
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worm and commonly known as the Old World hookworm. It lives in the
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Hotez, P.J.; Pritchard, D.I. (June 1995). "Hookworm infection".
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species that are normally discussed together as the cause of
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This article is about the worm. For the infection, see
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Murray, P.R.; Rosenthal, K.S.; Pfaller, M.A. (2009).
538: 476:Nemaplex: Nematode-Plant Expert Information System 620: 499: 497: 404:Schematic of thin-shelled egg at eight-cell stage 2134: 543:(Fourth ed.). Elsevier. pp. 291–327. 775: 706: 494: 822: 780:(8th ed.). McGraw-Hill. pp. 472–3. 534: 532: 530: 323:causes abdominal pain, loss of appetite, and 1325: 829: 815: 802:Ancylostoma duodenale image library at DPD 527: 38: 16:Species of the roundworm genus Ancylostoma 650: 597: 445:Global Biodiversity Information Facility 621:Peduzzi, R.; Piffaretti, J.-C. (1983). 571: 2135: 614: 503: 465: 1913: 1912: 810: 776:Schmidt, G.D.; Roberts, L.S. (2009). 743: 2055:8536cff7-0c1a-4a44-9dab-feb11c3187c1 478:. University of California, Davis. 13: 700: 549:10.1016/B978-0-12-415915-0.00016-9 253: 14: 2179: 795: 729:10.1038/scientificamerican0695-68 482:from the original on 1 March 2009 761:(6th ed.). Elsevier/Mosby. 409: 397: 385: 373: 56: 282: 667: 627:and the Saint Gothard anaemia" 565: 466:Ferris, Howard (23 May 2005). 428: 1: 2148:Parasitic nematodes of humans 440:(Dubini, 1843) Creplin, 1845" 421: 303:working in the hot and humid 1288:Diphyllobothrium mansonoides 314: 269: 7: 2168:Nematodes described in 1843 1625:Angiostrongylus cantonensis 1274:Spirometra erinaceieuropaei 778:Foundations of parasitology 10: 2184: 416:Infective filariform larva 366: 18: 1921: 1879:Capillaria philippinensis 1842: 1811: 1802:Halicephalobus gingivalis 1773:Strongyloides stercoralis 1762: 1669: 1565: 1537: 1490: 1379: 1370: 1343: 1334: 1312: 1249: 1165: 1150: 1061: 1028: 941: 876: 861: 848: 679:www.neglecteddiseases.gov 643:10.1136/bmj.287.6409.1942 184: 177: 158: 151: 53:Scientific classification 51: 47:Photomicrograph of larva 46: 37: 30: 1885:Intestinal capillariasis 966:Dicrocoelium dendriticum 1872:Trichuriasis / Whipworm 1822:Enterobius vermicularis 1603:Cutaneous larva migrans 1176:Echinococcus granulosus 1116:Heterophyes heterophyes 1102:Gastrodiscoides hominis 925:Trichobilharzia regenti 631:British Medical Journal 578:British Medical Journal 392:Diagram of adult's head 1720:Visceral larva migrans 1501:Gnathostoma spinigerum 1354:Dracunculus medinensis 1260:Diphyllobothrium latum 1039:Paragonimus westermani 1006:Opisthorchis viverrini 590:10.1136/bmj.1.1054.382 333:iron-deficiency anemia 187:Agchylostoma duodenale 1967:Ancylostoma_duodenale 1953:Ancylostoma duodenale 1923:Ancylostoma duodenale 1587:Ancylostoma duodenale 1130:Metagonimus yokogawai 625:Ancylostoma duodenale 508:Ancylostoma duodenale 470:Ancylostoma duodenale 438:Ancylostoma duodenale 248:Ancylostoma duodenale 226:Ancylostoma duodenale 216:. It is a parasitic 200:Ancylostoma duodenale 162:Ancylostoma duodenale 32:Ancylostoma duodenale 2050:Fauna Europaea (new) 1853:Trichinella spiralis 1680:Ascaris lumbricoides 1480:Lymphatic filariasis 1462:Wuchereria bancrofti 759:Medical Microbiology 572:Bugnion, E. (1881). 514:Animal Diversity Web 1867:Trichuris trichiura 1794:Trichostrongyliasis 1396:Onchocerca volvulus 952:Clonorchis sinensis 887:Schistosoma mansoni 868:Trematode infection 721:1995SciAm.272f..68H 2143:Parasitic diseases 1753:Parascaris equorum 1739:Dioctophyme renale 1659:Oesophagostomiasis 1631:Angiostrongyliasis 1611:Necator americanus 1581:Hookworm infection 1441:Dirofilaria repens 1266:Diphyllobothriasis 1157:Tapeworm infection 1088:Fasciolopsis buski 541:Human Parasitology 356:Necator americanus 321:hookworm infection 240:hookworm infection 234:are the two human 231:Necator americanus 2158:Parasites of dogs 2153:Parasites of cats 2130: 2129: 2115:Open Tree of Life 1915:Taxon identifiers 1906: 1905: 1902: 1901: 1838: 1837: 1561: 1560: 1557: 1556: 1308: 1307: 1304: 1303: 1182:E. multilocularis 1146: 1145: 986:Fasciola hepatica 838:Parasitic disease 558:978-0-12-415915-0 207:of the roundworm 196: 195: 191: 144:A. duodenale 2175: 2163:Ancylostomatidae 2123: 2122: 2110: 2109: 2097: 2096: 2084: 2083: 2071: 2070: 2058: 2057: 2045: 2044: 2032: 2031: 2019: 2018: 2006: 2005: 1993: 1992: 1980: 1979: 1970: 1969: 1957: 1956: 1955: 1942: 1941: 1940: 1910: 1909: 1787:Trichostrongylus 1779:Strongyloidiasis 1645:Metastrongylosis 1377: 1376: 1341: 1340: 1332: 1331: 1323: 1322: 1227:Hymenolepis nana 1163: 1162: 1063:Intestinal fluke 874: 873: 859: 858: 831: 824: 817: 808: 807: 791: 772: 753: 740: 694: 693: 691: 690: 681:. Archived from 671: 665: 664: 654: 637:(6409): 1942–5. 618: 612: 611: 601: 569: 563: 562: 536: 525: 524: 522: 520: 501: 492: 491: 489: 487: 463: 457: 456: 454: 452: 432: 413: 401: 389: 377: 345:infant mortality 337:low birth weight 189: 164: 120:Ancylostomatidae 61: 60: 42: 28: 27: 2183: 2182: 2178: 2177: 2176: 2174: 2173: 2172: 2133: 2132: 2131: 2126: 2118: 2113: 2105: 2100: 2092: 2087: 2079: 2074: 2066: 2061: 2053: 2048: 2040: 2035: 2027: 2022: 2014: 2009: 2001: 1996: 1988: 1983: 1975: 1973: 1965: 1960: 1951: 1950: 1945: 1936: 1935: 1930: 1917: 1907: 1898: 1834: 1807: 1758: 1665: 1653:Oesophagostomum 1599:Ancylostomiasis 1569: 1553: 1533: 1513:Gnathostomiasis 1486: 1383: 1366: 1317: 1314: 1300: 1251:Pseudophyllidea 1245: 1196:Taenia saginata 1154: 1142: 1094:Fasciolopsiasis 1079:Echinostomiasis 1057: 1024: 1018:Opisthorchiasis 937: 917:Schistosomiasis 911:S. intercalatum 865: 863:Fluke/trematode 854: 851: 844: 835: 798: 788: 769: 752:: 441–9, 483–8. 703: 701:Further reading 698: 697: 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1639:Metastrongylus 1635: 1634: 1633: 1621: 1620: 1619: 1607: 1606: 1605: 1593:A. braziliense 1583: 1577: 1575: 1563: 1562: 1559: 1558: 1555: 1554: 1552: 1551: 1543: 1541: 1535: 1534: 1532: 1531: 1530: 1529: 1517: 1516: 1515: 1496: 1494: 1488: 1487: 1485: 1484: 1483: 1482: 1458: 1457: 1456: 1454:Dirofilariasis 1444: 1437: 1436: 1435: 1433:Mansonelliasis 1423: 1422: 1421: 1406: 1405: 1404: 1402:Onchocerciasis 1391: 1389: 1374: 1368: 1367: 1365: 1364: 1363: 1362: 1360:Dracunculiasis 1349: 1347: 1338: 1329: 1320: 1310: 1309: 1306: 1305: 1302: 1301: 1299: 1298: 1297: 1296: 1284: 1283: 1282: 1270: 1269: 1268: 1255: 1253: 1247: 1246: 1244: 1243: 1242: 1241: 1239:Hymenolepiasis 1223: 1222: 1221: 1192: 1191: 1190: 1188:Echinococcosis 1171: 1169: 1167:Cyclophyllidea 1160: 1148: 1147: 1144: 1143: 1141: 1140: 1139: 1138: 1136:Metagonimiasis 1126: 1125: 1124: 1122:Heterophyiasis 1112: 1111: 1110: 1108:Amphistomiasis 1098: 1097: 1096: 1084: 1083: 1082: 1067: 1065: 1059: 1058: 1056: 1055: 1054: 1053: 1051:Paragonimiasis 1034: 1032: 1026: 1025: 1023: 1022: 1021: 1020: 1002: 1001: 1000: 982: 981: 980: 978:Dicrocoeliasis 962: 961: 960: 947: 945: 939: 938: 936: 935: 934: 933: 931:Swimmer's itch 921: 920: 919: 905:S. haematobium 882: 880: 871: 856: 846: 845: 834: 833: 826: 819: 811: 805: 804: 797: 796:External links 794: 793: 792: 787:978-0071311038 786: 773: 768:978-0323076791 767: 754: 741: 702: 699: 696: 695: 666: 613: 564: 557: 526: 493: 458: 426: 425: 423: 420: 419: 418: 415: 408: 406: 403: 396: 394: 391: 384: 382: 379: 372: 368: 365: 316: 313: 284: 281: 271: 268: 255: 252: 194: 193: 182: 181: 175: 174: 167: 156: 155: 149: 148: 141: 139: 135: 134: 127: 123: 122: 117: 113: 112: 107: 103: 102: 97: 93: 92: 87: 83: 82: 77: 73: 72: 67: 63: 62: 49: 48: 44: 43: 35: 34: 15: 9: 6: 4: 3: 2: 2180: 2169: 2166: 2164: 2161: 2159: 2156: 2154: 2151: 2149: 2146: 2144: 2141: 2140: 2138: 2121: 2116: 2112: 2108: 2103: 2099: 2095: 2090: 2086: 2082: 2077: 2073: 2069: 2064: 2060: 2056: 2051: 2047: 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984: 971: 964: 950: 923: 910: 904: 898: 893:S. japonicum 892: 885: 777: 758: 749: 745: 715:(6): 68–74. 712: 708: 687:. Retrieved 683:the original 678: 669: 634: 630: 624: 616: 581: 577: 567: 540: 517:. Retrieved 513: 507: 484:. Retrieved 475: 469: 461: 449:. Retrieved 443: 437: 430: 361:A. duodenale 360: 355: 352:A. duodenale 351: 350:The eggs of 349: 318: 293:A. duodenale 292: 288:A. duodenale 287: 286: 283:Epidemiology 277:A. duodenale 276: 273: 264:A. duodenale 263: 259:A. duodenale 258: 257: 247: 229: 225: 211: 199: 198: 197: 190:Dubini, 1843 186: 185: 161: 159: 143: 142: 130: 31: 25: 2076:iNaturalist 1947:Wikispecies 1893:C. hepatica 1859:Trichinosis 1844:Adenophorea 1700:Anisakiasis 1567:Strongylida 1548:Gongylonema 1539:Spiruroidea 1527:Thelaziasis 1507:G. hispidum 1381:Filarioidea 1345:Camallanida 1327:Secernentea 1294:Sparganosis 1280:Sparganosis 1233:H. diminuta 1202:T. asiatica 1072:Echinostoma 1012:O. felineus 998:Fasciolosis 943:Liver fluke 878:Blood fluke 519:9 September 451:9 September 309:Switzerland 242:. They are 213:Ancylostoma 131:Ancylostoma 100:Chromadorea 2137:Categories 1764:Rhabditida 1686:Ascariasis 1671:Ascaridida 1448:D. immitis 1427:Mansonella 1419:filariasis 1386:Filariasis 1313:Roundworm/ 1030:Lung fluke 899:S. mekongi 840:caused by 689:2017-04-26 486:22 January 422:References 110:Rhabditida 1474:B. timori 1372:Spirurida 1318:infection 1215:Taeniasis 1208:T. solium 972:D. hospes 855:infection 850:Flatworm/ 746:CBT. Bakt 315:Infection 270:Lifecycle 244:dioecious 138:Species: 76:Kingdom: 70:Eukaryota 2094:11555299 1974:BioLib: 1938:Q2520810 1932:Wikidata 1813:Oxyurida 1694:Anisakis 1572:hookworm 1521:Thelazia 1336:Spiruria 1316:Nematode 608:20749811 480:Archived 325:geophagy 319:A light 236:hookworm 218:nematode 179:Synonyms 116:Family: 90:Nematoda 86:Phylum: 80:Animalia 66:Domain: 2068:4558924 2003:2921231 1714:T. cati 1417:Loa loa 1410:Loa loa 1152:Cestoda 737:7761817 717:Bibcode 709:Sci. Am 661:6418279 652:1550193 599:2263460 367:Gallery 205:species 172:, 1843) 126:Genus: 106:Order: 96:Class: 2120:332059 2081:417519 2042:391353 2029:250604 2016:ANCTDU 1210:(pork) 784:  765:  735:  659:  649:  606:  596:  555:  343:, and 301:miners 299:among 170:Dubini 2107:51022 2089:IRMNG 2024:EUNIS 1990:28707 1977:88456 329:edema 209:genus 203:is a 2102:NCBI 2063:GBIF 2011:EPPO 1985:BOLD 1789:spp. 782:ISBN 763:ISBN 733:PMID 657:PMID 604:PMID 553:ISBN 521:2024 488:2009 453:2024 354:and 228:and 1998:EoL 1962:AFD 725:doi 713:272 647:PMC 639:doi 635:287 594:PMC 586:doi 545:doi 311:). 2139:: 2117:: 2104:: 2091:: 2078:: 2065:: 2052:: 2039:: 2026:: 2013:: 2000:: 1987:: 1964:: 1949:: 1934:: 1722:/ 1711:/ 1601:/ 1590:/ 1504:/ 1471:/ 1465:/ 1230:/ 1217:/ 1205:/ 1199:/ 1179:/ 1042:/ 1009:/ 989:/ 969:/ 908:/ 902:/ 896:/ 890:/ 750:24 748:. 731:. 723:. 711:. 677:. 655:. 645:. 633:. 629:. 602:. 592:. 580:. 576:. 551:. 529:^ 512:. 496:^ 474:. 442:. 347:. 339:, 246:. 1874:) 1870:( 1574:) 1570:( 1388:) 1384:( 1159:) 1155:( 870:) 866:( 830:e 823:t 816:v 790:. 771:. 739:. 727:: 719:: 692:. 663:. 641:: 623:" 610:. 588:: 582:1 561:. 547:: 523:. 510:" 506:" 490:. 472:" 468:" 455:. 436:" 307:( 168:( 23:.

Index

Ancylostomiasis

Scientific classification
Edit this classification
Eukaryota
Animalia
Nematoda
Chromadorea
Rhabditida
Ancylostomatidae
Ancylostoma
Binomial name
Dubini
Synonyms
species
genus
Ancylostoma
nematode
small intestine
Necator americanus
hookworm
hookworm infection
dioecious
ancylostomiasis
miners
Gotthard Tunnel
Switzerland
hookworm infection
geophagy
edema

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