Strategies of the control of an outbreak of leptospiral infection in dairy cattle in Northeastern Brazil     

Pimenta  Carla Lauise Rodrigues Menezes  da Costa  Diego Figueiredo  Silva  Maria Luana Cristiny Rodrigues  Pereira  Hélio Domingos  Júnior  João Pessoa Araújo  Malossi  Camila Dantas  Ullmann  Leila Sabrina  Alves  Clebert José  de Azevedo  Sérgio Santos 《Tropical animal health and production》2019,51(1):237-241

The aim of the present study was to describe the strategies of the control of an outbreak of leptospiral infection in dairy cattle in Maranhão State, Northeastern Brazil. In the period from January to July 2015, 18 (17%) out of 106 cows presented abortion, six (5.7%) stillbirth, and 12 (11.3%) repeated estrus, totaling 24 animals with reproductive problems. The diagnosis of leptospirosis was based on serology (microscopic agglutination test—MAT), bacteriological culture, and polymerase chain reaction (PCR). Antibiotic therapy, vaccination protocols, and changes in management practices were suggested as control measures. Of all animals on the farm (n?=?280), 136 (48.6%) were seropositive for at least one serovar of Leptospira sp. No pure leptospiral culture was obtained. Eight of the animals with reproductive problems yielded positive PCR results (vaginal fluid of seven animals and urine and vaginal fluid of one animal). Genetic sequencing of a vaginal fluid/urine PCR-positive sample revealed Leptospira borgpetersenii. One year after the adoption of control measures, no reproductive problems were observed. Thus, leptospirosis probably caused the reproductive failures in the herd, and the control and prevention measures implemented were efficient in controlling the disease.

  相似文献   

High frequency of genital carriers of Leptospira sp. in sheep slaughtered in the semi-arid region of northeastern Brazil     

Silva  A. F.  Farias  P. J. A.  Silva  M. L. C. R.  Araújo Júnior  J. P.  Malossi  C. D.  Ullmann  L. S.  Costa  D. F.  Higino  S. S. S  Azevedo  S. S.  Alves  C. J. 《Tropical animal health and production》2019,51(1):43-47

Tropical Animal Health and Production - Although some studies in sheep have indicated leptospire colonization of the genital tract, further studies are needed to clarify the role of genital...  相似文献