The epidemiology ofLeptospira interrogansserovarpomonain grower pig herds
作者:
I. Bolt,
R.B. Marshall,
期刊:
New Zealand Veterinary Journal
(Taylor Available online 1995)
卷期:
Volume 43,
issue 1
页码: 10-15
ISSN:0048-0169
年代: 1995
DOI:10.1080/00480169.1995.35833
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
An epidemiological study on four farms showed that leptospiral infection became apparent in piglets from 12 weeks of age. The intensity of leptospiruria was greatest in the first 3–4 weeks of infection and from then on declined and became intermittent. Factors affecting the cultural and serological prevalence of infection of the piglets were found to be the standard of hygiene and variations in the titre of the dam. Dams with high titres gave better protection to their young than did those with low titres. The spread of infection within piggeries was encouraged by mixing infected with uninfected pigs, which resulted in epidemics within the pens. Transmission from infected to susceptible grower pigs continuously occurred in grower houses, with a constant proportion of pigs becoming infected each week.
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