Boars as carriers of leptospires of the Australis serogroup on farms with an abortion problem

Ellis, William; McParland, PJ; Bryson, D.G.; Cassells, J.A.

doi:10.1136/vr.118.20.563

Cited by 39 publications

(35 citation statements)

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“…Infection with Leptospira interrogans serovars Bratislava and Australis are an important cause of porcine reproductive failure in Europe [17][18][19][20]. Infection with L. interrogans serovar Hardjö may suggest contamination of lake water by cattle [3,21].…”

Section: Discussionmentioning

confidence: 98%

Outbreak of leptospirosis among triathlon participants in Langau, Austria, 2010

Radl

Müller

Revilla‐Fernández

et al. 2011

Wien Klin Wochenschr

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We report on the first documented outbreak of leptospirosis in Austria. In July 2010, four cases of serologically confirmed leptospirosis occurred in athletes after a triathlon held in Langau. Heavy rains preceded the triathlon (rainfall: 22 mm). The index case (Patient A) was a 41-year-old previously healthy male, who was admitted to hospital A on July 8 with a four-day history of fever up to 40°C that began 14 days after attending the triathlon event. On July 7, patient B, a 42-year-old male, was admitted to the same hospital, with signs and symptoms of kidney failure. Hemodialysis was performed every other day for 3 weeks. While the serum drawn on the day of admission was negative for antibodies against Leptospira, a specimen from July 28 tested positive with Leptospira interrogans. On July 11, patient C, a 40-year-old male, was admitted to hospital B for nephritis. On July 14, patient D, a 44-year-old male, was admitted to hospital C with a ten days history of intermittent fever, mild dry cough and headache. Our report underlines that in Austria recreational users of bodies of freshwater must be aware of an existing risk of contracting leptospirosis, particularly after heavy rains. The suppressive influence of a triathlon on the immune system is well documented and therefore an outbreak in this population group can be seen as a sensitive indicator concerning possible risk for the general population.

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Section: Discussionmentioning

confidence: 98%

Outbreak of leptospirosis among triathlon participants in Langau, Austria, 2010

Radl

Müller

Revilla‐Fernández

et al. 2011

Wien Klin Wochenschr

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“…Venereal transmission is thought to play an important role in the spread of infections with serovar bratislava. Leptospires may persist for extende intervals in kidneys and genital tracts of sows and boars, and be excreted in urine and genital tract fluids [8].…”

Section: Leptospirosismentioning

confidence: 99%

Diseases in swine transmitted by artificial insemination: An overview

et al. 2008

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Artificial insemination (AI) of swine is widely practiced in countries with an intensive pig production. It is a very useful tool to introduce superior genes into sow herds, with minimal risk for disease transmission. However, the impact of semen that is contaminated with pathogens can be enormous. Most of the micro-organisms that have been detected in boar semen are considered non-pathogenic, but some are known pathogens (e.g. porcine reproductive and respiratory syndrome virus) that can cause major economic losses. Microbial contamination of semen can be due to systemic and/or urogenital tract infections of the boar, or can occur during collection, processing and storage. It can result in reduced semen quality, embryonic or fetal death, endometritis and systemic infection and/or disease in the recipient female. Conventional techniques for isolation of bacteria and viruses from the semen do not always provide optimal results for various reasons, including lack of sensitivity and speed of testing, and difficult interpretation of the outcome. More recently, PCR tests are commonly used; they have a high sensitivity, the outcome is quickly obtained, and they are suitable for monitoring a large number of samples. The best strategy to prevent AI-transmitted diseases is to use boars that are free of specific pathogens, to monitor the animals and semen regularly, and to maintain very high biosecurity. Additional measures should be directed at treating semen with appropriate antimicrobials, and at reducing contamination during semen collection, processing, and storage. #

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“…The concept that the kidney is the main location of persistent leptospira and the main maintainer of the chronic disease state has been questioned by new findings in swine infected by bratislava serovar, which was isolated from the oviduct and uterus of sows that aborted and from the reproductive tract of boars (11). In cattle, hardjo serovar was isolated from the reproductive tract of non-pregnant cows (12). In the microscopic serum-agglutination test (SAM) the 100 titer is considered positive (21), but Ellis et al (11) isolated leptospira from the reproductive tract of sows with titers ranging from 10 to 30.…”

Section: Introductionmentioning

confidence: 99%

Leptospirosis in slaughtered sows: serological and histopathological investigation

Delbem

Freitas

Bracarense

et al. 2002

Braz. J. Microbiol.

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Swine leptospirosis is recognized world wide as an important cause of reproductive failure. Serum and histopathological examinations have been constantly used to diagnose this disease. This study was carried out on slaughtered sows from Northern Paraná State to compare serum findings with kidney, liver, ovary and uterus histo-pathological examinations. The microscopic serum-agglutination carried out on 36 animals detected 24 with titles > 100 and 12 negative (< 100). The histopathological examinations made on livers, kidneys, ovaries and uterus stained with hematoxylin-eosin, were carried out on 16 randomly chosen animals, 11 from the groups with > 100 serological titles and five from the negative group. The results showed that all the 16 animals had indicative lesions in the liver or in one of the kidneys. There were no lesions in the ovaries or uterus. Microscopic serum-agglutination title readings between 20 and 80 were detected in animals of the group considered negative with title < 100.

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Boars as carriers of leptospires of the Australis serogroup on farms with an abortion problem

Cited by 39 publications

References 0 publications

Outbreak of leptospirosis among triathlon participants in Langau, Austria, 2010

Outbreak of leptospirosis among triathlon participants in Langau, Austria, 2010

Diseases in swine transmitted by artificial insemination: An overview

Leptospirosis in slaughtered sows: serological and histopathological investigation

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