Affiliation(s)
1. College of Veterinary Medicine, Northwest A&F University, Yangling 712100, Shaanxi Province, China
2. Department of Parasitology, College of Basic Medicine, Hubei University of Medicine, Shiyan 442000, Hubei Province, China
3. Animal Diseases Control & Prevention Centre of Yulin City, Yulin 719000, Shaanxi Province, China
ABSTRACT
Orf is an important viral disease that affects goats and sheep and
results in large economic losses. The aim of this study was to investigate the
prevalence of orf and identify the potential risk factors of this disease in
the main breeding areas of China. Among 1,241 blood samples collected from goats without clinical signs of orf,
433 samples (34.89%) were positive for orf virus infection, which was detected by polymerase chain reaction (PCR)
targeting a
partial B2L sequence of the
viral genome. Moreover, a total of 874 buccal swab samples were collected,
of which 64 samples (7.32%) were positive for the orf virus on the basis of PCR
detection. According to logistic regression, all of the variables, including
age, breed, location and farm management, had significant impacts on the
prevalence of orf. Lambs under intensive management in Yunnan province were
more susceptible to orf virus infection than animals in other groups.
Anglo-Nubian goats were at more risk of orf positivity than other breeds,
whereas Saanen dairy goats were at significantly less risk. In summary, as the
first epidemiological study of orf in China, this investigation suggested that orf is a neglected
disease that requires more attention in the future.
KEYWORDS
Orf prevalence, risk factors, goats, China.
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