Impact of the subclinical small ruminant lentivirus infection of female goats on the litter size and the birth body weight of kids
| Autor: | Lucjan Witkowski, Jarosław Kaba, Olga Szaluś-Jordanow, Danuta Słoniewska, Maciej Witkowski, Emilia Bagnicka, Tomasz Nalbert, Michał Czopowicz, Daria Reczyńska |
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| Rok vydání: | 2019 |
| Předmět: |
Male
Litter (animal) Litter Size 040301 veterinary sciences education 030231 tropical medicine Body weight 0403 veterinary science 03 medical and health sciences 0302 clinical medicine Animal science Food Animals Pregnancy Animals Birth Weight Small ruminant Pregnancy Complications Infectious Asymptomatic Infections Subclinical infection Goat Diseases biology Goats 04 agricultural and veterinary sciences biology.organism_classification humanities Parity Quadruplets Lentiviruses Ovine-Caprine Lentivirus Lentivirus Infections Herd Colostrum Female Animal Science and Zoology human activities |
| Zdroj: | Preventive Veterinary Medicine. 165:71-75 |
| ISSN: | 0167-5877 |
| DOI: | 10.1016/j.prevetmed.2019.02.011 |
| Popis: | A longitudinal study was conducted in a single dairy goat herd to investigate the relationship between subclinical small ruminant lentivirus (SRLV) infection in does and litter size (LS) or birth body weight of kids (BW). Each year kids born to seropositive and seronegative does were weighed before the first consumption of colostrum. LS and BW of each kid were recorded. BW was significantly negatively linked to LS (p = 0.006) - singletons weighed (mean ± SD) 4.20 ± 0.67 kg, twins - 3.75 ± 0.62 kg, and triplets and quadruplets - 3.38 ± 0.47 kg. Male kids were significantly heavier than female kids in twin litters (3.97 ± 0.53 kg vs. 3.52 ± 0.60 kg; p 0.001) and triplet or quadruplet litters (3.62 ± 0.40 kg vs. 3.17 ± 0.43 kg; p 0.001). However, BW of male and female kids from singleton litters did not differ (4.31 ± 0.71 kg vs. 4.07 ± 0.65 kg; p = 0.154). Then, two mixed models were developed to assess the relationship between LS (mixed Poisson log linear regression model) or BW (mixed linear model) and SRLV infection in the doe, controlling for potential confounders such as the effect of an individual doe, year in which the parturition took place, parity and kid's sex. Neither LS nor BW proved to be significantly associated with SRLV infection (p = 0.788 and p = 0.214, respectively). On this basis it was concluded that LS and BW were not affected by the subclinical SRLV infection of a doe. |
| Databáze: | OpenAIRE |
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