Natural infection of free-range chickens with the ascarid nematode Toxocara sp

Parasitology Research
Danielle R Campos-da-SilvaF E L Pereira

Abstract

Human toxocariasis may be acquired by eating raw chicken liver. However, there are no reports on the prevalence of natural infection of chickens with Toxocara. The aim of this study was to evaluate the presence of anti-Toxocara antibodies as indicators of natural infection with Toxocara, in free-range chickens from Espírito Santo State, Brazil. An ELISA test with secretory and excretory Toxocara canis antigens was used. Negative controls were 20 industrial chickens reared in a high hygiene standard environment. Positive control serum was from a chicken infected with embryonated eggs of T. canis. Sera were adsorbed with Ascaridia galli extract to reduce cross-reactivity. Cut-off was the mean plus four times the standard deviation of optical density (OD) in negative group. One hundred and fifty-seven sera from free-range chicken were investigated. Results showed 58.5% of the chickens were positive with ELISA test; 12.7% had OD over the positive control and may be considered as true infected chickens. The results between the cut-off and the positive control may include infections with low titers of antibodies or may represent serum scar of past infection or may be the result of cross-reaction with other nematodes rather than A. ga...Continue Reading

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Citations

Oct 30, 2016·Experimental Parasitology·Ricardo da Silva RaposoCecília Braga Laposy
May 31, 2018·Revista brasileira de parasitologia veterinária = Brazilian journal of veterinary parasitology : Órgão Oficial do Colégio Brasileiro de Parasitologia Veterinária·Adilson Cardoso de OliveiraVamilton Alvares Santarém
Aug 10, 2018·Parasitology Research·Yslla Fernanda Fitz Balo MeriguetiVamilton Alvares Santarém
May 13, 2021·Parasites & Vectors·Paula Andreia Fabris GiudiceVamilton Alvares Santarém
May 28, 2021·Research and Reports in Tropical Medicine·Pedro Paulo ChieffiSergio Vieira Dos Santos
Oct 26, 2021·Parasitology·Sara R HealyMartha Betson

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