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Tropical Animal Health and Production

, Volume 37, Issue 6, pp 443–449 | Cite as

Annual Variations in Leptospira Seroprevalence among Sows in Southern Vietnam

  • S. Boqvist
  • V. T. Ho Thi
  • U. Magnusson
Article

Abstract

A serological survey was conducted among sows in the Mekong delta in southern Vietnam in 1999 to investigate variations in leptospiral Seroprevalence over a one-year period. In this region, leptospirosis is endemic and a high leptospiral Seroprevalence has been shown in the pig population. In this study, the serology of six Leptospira serovars was analysed by the microscopic agglutination test for 429 sows at five large-scale state farms sampled during the dry period, the rainy period and the early dry period. The serovars included were L. interrogans serovar (sv) autumnalis strain Akiyama A, L. interrogans sv bratislava strain Jez, L. interrogans sv icterohaemorrhagiae strain Kantorowicz, L. interrogans sv pomona strain Pomona, L. borgpetersenii sv tarassovi strain Perepelitsin, and L. kirschneri sv grippotyphosa strain Duyster. Variations in Seroprevalence over the year were found for sv bratislava and sv icterohaemorrhagiae: the Seroprevalence was higher during the dry period compared with the rainy period (p = 0.07 and p = 0.005, respectively) and the early dry period (p = 0.00006 and p = 0.0006, respectively). It is concluded that in regions where water is constantly abundant and where animals are exposed to the outdoor environment all year round there are highly significant variations in leptospiral Seroprevalence over the year.

Keywords

Leptospira pig seasonal variation serology Vietnam 

Abbreviation

MAT

microscopic agglutination test

sv

serovar

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Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  1. 1.Department of Obstetrics and Gynaecology, Centre of Reproductive Biology in Uppsala (CRU)Swedish University of Agricultural SciencesUppsalaSweden
  2. 2.Faculty of Animal Husbandry and Veterinary MedicineCan Tho UniversityCan ThoVietnam
  3. 3.Department of Disease ControlNational Veterinary Institute, Swedish Zoonosis CentreUppsalaSweden

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