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PubMed1987

The isolation of Leptospira interrogans serovar pomona and related serological findings associated with a mixed farming unit in the Transvaal.

This is the first known isolation in the Republic of South Africa (RSA) of the serovar pomona from the organs of porcine foetuses as well as from the renal lymph nodes of slaughter pigs showing chronic nephritis. In addition, the serovar pomona was isolated from the kidneys of 87.5% of the slaughter pigs examined. The success of these isolations was attributed in part to the refining of 2 existing isolation techniques which complement each other. Using the microscopic agglutination test, serum samples taken from the same farming unit showed evidence of antibodies to the serovar pomona in 89 out of the 170 bovines (52%), 9 out of the 52 porcines (17%), 2 of the 2 canines (100%), 5 out of the 13 equines (38%) and 2 out of the 152 ovines (1%) that were tested. As far as is known, serological evidence of the serovar pomona in porcines, ovines, equines and canines has never previously been published in the RSA.

Animals↗
PubMed1986

[Leptospira hardjo on a dairy farm].

The results of a bacteriological and serological study of the presence of L. hardjo on a dairy farm in view of a case of milk fever in a farmer are reviewed. In addition, the epidemiology, prevention and possible treatment of the infection on the dairy farm are discussed.

Adult↗
PubMed1979

[Leptospira distribution in the soil of a natural focus of the infection (an attempt at the radioisotopic labelling of infected voles)].

The mass radioisotope (32P) labelling of all tundra voles excreting Zeptospira, infected urine was carried out over the area of 1 ha, and the results of the experiment analyzed by the method of planar coherent graphs, showed the irregular (spotted) distribution of "infected spots", i. e. soil patches contaminated by Zeptospira. The borders of individual small foci of infection did not coincide with the outlines of soil and vegetational divisions of the area. The spatial structure of the "extraorganismic" part of the Zeptospira population was originally formed by the carriers and thus determined by their mobility, their manner of using the territory. Later this structure was changed by selective elimination under the influence of living conditions for Zeptospira in the soil. The "infected spots", subjected to such selection, seem to be capable of constantly sustaining Zeptospira; the presence of these organisms is also due to the fact that they are regularly added into the soil with urine excreted by the carriers visiting the same spots of their territory.

Animals↗
PubMedDate not supplied

Serum antibodies to Leptospira bratislava in Swedish pigs and horses.

Sera from 116 and 89 Swedish pigs and horses respectively were examined for the presence of antibodies to L. bratislava. Antibodies were found in 18.1 and 49.4% respectively of pigs and horses examined. Presence of serum antibodies was not associated with clinical signs of infection.

Animals↗

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