Concurrent Ascaris suum and Oesophagostomum dentatum infections in pigs
| Autor: | Peter Nansen, Allan Roepstorff, C. M. Christensen, A.B Helwigh |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Male
Veterinary medicine Swine Population Antibodies Helminth Parasitism Enzyme-Linked Immunosorbent Assay Biology Group A Group B Feces Intestine Small parasitic diseases Image Processing Computer-Assisted medicine Animals Parasite hosting Intestine Large education Lung Parasite Egg Count Ascaris suum Swine Diseases Ascariasis education.field_of_study General Veterinary Inoculation General Medicine biology.organism_classification Specific Pathogen-Free Organisms Oesophagostomum Liver Female Parasitology medicine.symptom Oesophagostomiasis Weight gain |
| Zdroj: | Technical University of Denmark Orbit |
| ISSN: | 0304-4017 |
| DOI: | 10.1016/s0304-4017(99)00007-2 |
| Popis: | The aim of this study was to examine interactions between Ascaris suum and Oesophagostomum dentatum infections in pigs with regard to population dynamics of the worms such as recovery, location and length; and host reactions such as weight gain, pathological changes in the liver and immune response. Seventy-two helminth-naive pigs were allocated into four groups. Group A was inoculated twice weekly with 10 000 O. dentatum larvae for 8 weeks and subsequently challenge-infected with 1000 A. suum eggs, while Group B was infected with only 1000 A. suum eggs; Group C was inoculated twice weekly with 500 A. suum eggs for 8 weeks and subsequently challenge-infected with 5000 O. dentatum larvae, whereas Group D was given only 5000 O. dentatum larvae. All trickle infections continued until slaughter. Twelve pigs from Group A and B were slaughtered 10 days post challenge infection (p.c.i.) and the remaining 12 pigs from the each of the four groups were slaughtered 28 days p.c.i.. No clinical signs of parasitism were observed. The total worm burdens and the distributions of the challenge infection species were not influenced by previous primary trickle-infections with the heterologous species. Until day 10 p.c.i. the ELISA response between A. suum antigen and sera from the O. dentatum trickle infected pigs (Group A) pigs were significantly higher compared to the uninfected Group B. This was correlated with a significantly higher number of white spots on the liver surface both on Day 10 and 28 p.c.i. in Group A compared to Group B. The mean length of the adult O. dentatum worms was significantly reduced in the A. suum trickle infected group compared to the control group. These results indicate low level of interaction between the two parasite species investigated. |
| Databáze: | OpenAIRE |
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