Prepatent periods of different Oesophagostomum spp. isolates in experimentally infected pigs
| Autor: | Allan Roepstorff, C. M. Christensen, Henrik Bjørn, H. Talvik, Peter Nansen, Anja Joachim |
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| Rok vydání: | 1997 |
| Předmět: |
Veterinary medicine
Time Factors Swine medicine Parasite Egg Count Animals Parasite hosting Anthelmintic Feces Swine Diseases Oesophagostomum General Veterinary biology Inoculation General Medicine DNA Helminth biology.organism_classification Disease Models Animal Infectious Diseases Parasitology Insect Science Herd Female Oesophagostomiasis medicine.drug |
| Zdroj: | Parasitology Research. 83:563-568 |
| ISSN: | 1432-1955 0932-0113 |
| DOI: | 10.1007/s004360050298 |
| Popis: | To define prepatent periods of different Oesophagostomum spp. isolates we carried out two separate experiments, one using two monospecific laboratory isolates and another using laboratory isolates as well as isolates obtained from pig herds having different management systems and with different anthelmintic treatment histories. Pigs were inoculated with 1,000-2,000 infective larvae. Fecal samples were collected daily beginning on days 15 and 16 postinoculation (p.i.). Fecal cultures were set up at different times to yield larvae that could be identified by DNA analyses. All pigs started to excrete eggs on days 18-24 p.i. The mean prepatent period was 20.2 +/- 1.4 days, with no significant difference being observed between species and isolates. Prepatent periods of 17-19 days were found for the monospecific laboratory isolates of O. dentatum and O. quadrispinulatum. These findings conflict with parasitology textbooks; therefore, suggestions as to the possible reasons for the observed short prepatent periods are given. |
| Databáze: | OpenAIRE |
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