AI Article Synopsis

  • The study examined helminth infections in two chicken breeds in Vietnam—indigenous Ri and exotic Luong Phuong—looking for differences in prevalence and intensity.
  • The Ri chickens showed higher prevalence and infection intensity for various helminth species, while A. galli and C. obsignata were more common in Luong Phuong chickens.
  • The research also indicated that age affected helminth infections in Ri chickens, with adults more affected than young birds, and it found a significant correlation between certain MHC haplotypes and infection intensity, marking a new association in chicken studies.

Article Abstract

This study compared the prevalence and intensity of infections of helminths in 2 chicken breeds in Vietnam, the indigenous Ri and the exotic Luong Phuong. Also, possible correlations with the Major Histocompatibility Complex (MHC) were tested. The most prevalent helminths were Ascaridia galli, Heterakis beramporia, Tetrameres mothedai, Capillaria obsignata, Raillietina echinobothrida and Raillietina tetragona. Differences in prevalence and intensity of infection were found between the 2 breeds. Comparing the 2 groups of adult birds, Ri chickens were observed to have higher prevalence and infection intensities of several species of helminths, as well as a higher mean number of helminth species. In contrast, A. galli and C. obsignata were shown to be more prevalent in Luong Phuong chickens. Furthermore, an age-dependent difference was indicated in the group of Ri chickens in which the prevalence and the intensity of infection was higher for the adult than the young chickens for most helminths. The most notable exception was the significantly lower prevalence and intensities of A. galli in the group of adult chickens. In contrast, the prevalence and intensity were very similar in both age groups of Luong Phuong chickens. Using a genetic marker located in the MHC, a statistically significant correlation between several MHC haplotypes and the infection intensity of different helminth species was inferred. This is the first report of an association of MHC haplotype with the intensity of parasite infections in chickens.

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Source
http://dx.doi.org/10.1017/S0031182006002046DOI Listing

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