Study of the prevalence of Capillaria hepatica in humans and rodents in an urban area of the city of Porto Velho, Rondônia, Brazil

Hepatic capillariosis, caused by Capillaria hepatica (Calodium hepaticum) (Bancroft, 1893), Travassos, 1915 (Nematoda, Trichinelloidea, Capillariidae), is a common zoonosis in rodents but is rare in humans. Seventy-two cases in humans have been reported worldwide since the first case was described b...

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Published in:	Revista do Instituto de Medicina Tropical de São Paulo Vol. 57; no. 1; pp. 39 - 46
Main Authors:	Rocha, Elierson José Gomes da, Basano, Sérgio de Almeida, Souza, Márcia Maria de, Honda, Eduardo Resende, Castro, Márcio Botelho de, Colodel, Edson Moleta, e Silva, Jéssica Carolinne Damasceno, Barros, Lauro Prado, Rodrigues, Elisa Sousa, Camargo, Luís Marcelo Aranha
Format:	Journal Article
Language:	English
Published:	Brazil Instituto de Medicina Tropical de Sao Paulo 01-01-2015 Instituto de Medicina Tropical Universidade de São Paulo (USP)
Subjects:	Amazônia Animals Brazil - epidemiology Capillaria - immunology Capillaria hepatica Capillariasis Disease Reservoirs Enoplida Infections - diagnosis Enoplida Infections - epidemiology Epidemiology Humans Liver Diseases, Parasitic - diagnosis Liver Diseases, Parasitic - epidemiology Liver Diseases, Parasitic - parasitology Prevalence Rats Rodent Diseases - epidemiology Rodent Diseases - parasitology Rondônia TROPICAL MEDICINE Brazil Capillaria hepatica Capillariasis Amazônia Rondônia
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Summary:	Hepatic capillariosis, caused by Capillaria hepatica (Calodium hepaticum) (Bancroft, 1893), Travassos, 1915 (Nematoda, Trichinelloidea, Capillariidae), is a common zoonosis in rodents but is rare in humans. Seventy-two cases in humans have been reported worldwide since the first case was described by MACARTHUR in 192417,27. This study aimed to determine the prevalence of Capillaria hepatica in humans and rodents in an urban area of Porto Velho, the capital of Rondônia, in Brazil. After conducting a census of the area, 490 residents were randomly selected, and, after signing a term of consent, provided blood samples that were screened for anti-Capillaria hepatica antibodies. Simultaneously, rats were captured to assess the prevalence of this parasite in rodents by histopathological examination in liver sections. A prevalence of 1.8% was found among residents who had specific antibodies at a dilution of 1:150, indicating exposure to parasite eggs; 0.8% of the subjects also had positive titers at a dilution of 1:400, indicating true infection. The prevalence in rats was 2%. The prevalence of infection with this parasite among humans and rats was low. While the prevalence encountered among humans was within the limits reported in the literature, the prevalence among rodents was much lower.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0036-4665 1678-9946 1678-9946 0036-4665
DOI:	10.1590/S0036-46652015000100006