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At least 1,423 records · Page 79Linked to original sources
PubMed1986

Prevalence of Leptospira infection in aborted pigs in Northern Ireland.

During an investigation of pig abortions and stillbirths in Northern Ireland, leptospires were isolated from 55 of the 78 litters examined. Strains belonging to four serogroups (Australis, Icterohaemorrhagiae, Hebdomadis and Autumnalis) were recovered but leptospires of the Australis serogroup accounted for 91 per cent of the isolates. Two serovars of the Australis group bratislava and muenchen, were identified.

Abortion, Veterinary↗
PubMed1992

Isolation of Leptospira interrogans from kidneys of Zimbabwe beef cattle.

Four hundred and eighty bovine kidneys were collected from an abattoir near Harare between December 1987 and November 1988, and leptospires were recovered from 50 (10.4 per cent) of them. The isolates were identified to serogroup level by the microscopic agglutination test; 32 belonged to serogroup Sejroe, seven were Pyogenes, four Hebdomadis, two Tarassovi, and one isolate each belonged to serogroups Australis, Bataviae, Grippotyphosa, Icterohaemorrhagiae and Pomona.

Abattoirs↗
PubMed1992

Development of a control strategy for Leptospira hardjo infection in a closed beef herd.

Serological evidence of infection with a leptospire belonging to the Sejroe serogroup was identified in a closed population of Luing cattle in the west of Scotland, and the geographical isolation of the population presented an opportunity to control and possibly eradicate the infection in a large beef herd farmed under extensive conditions. Serological and bacteriological studies revealed that infection was present at a high level throughout the herd, and that the infecting serovar was hardjo. Unlike endemic hardjo infection in dairy herds, new infections were still occurring in older age-groups. Investigations of other domestic and free-living species sharing the habitat demonstrated that the maintenance of an endemic focus of hardjo was restricted to the cattle. Changes in management to prevent the transmission of infection to successive cohorts of young animals were impractical and risky, and antibiotic treatment followed by removal to clean pasture failed to prevent new cases. Thus vaccination offered the only means of control and possible eradication, and the epidemiological characteristics of the infection dictated that the programme be applied to the whole herd.

Age Factors↗
PubMed1992

Experimental infection of pregnant gilts with Leptospira interrogans serovar mozdok.

Three pregnant gilts were experimentally infected with leptospires of the serovar mozdok, isolated from an aborted pig fetus from a Portuguese pig farm with abortion problems. All the gilts aborted dead or dying piglets on days 105 or 106 of pregnancy. Serovar mozdok was isolated from 12 of the 22 piglets in the three litters. Histological examination of the livers and kidneys of the gilts at the end of the experiment revealed evidence of disease, and leptospires were isolated from their kidneys. Their serological responses up to 42 days after inoculation were monitored by means of a microscopic agglutination test, using 21 antigens from 18 serogroups. Cross reactions to heterologous antigens belonging to the Grippotyphosa, Australis, Icterohaemorrhagiae and Cynopteri groups were observed in all of them.

Abortion, Veterinary↗