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Aymée L, Nogueira Di Azevedo MI, de Souza Pedrosa J, Loria de Melo JDS, Carvalho-Costa FA, Lilenbaum W. The role of Leptospira santarosai serovar Guaricura as agent of Bovine Genital Leptospirosis. Vet Microbiol 2022; 268:109413. [DOI: 10.1016/j.vetmic.2022.109413] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 03/18/2022] [Accepted: 03/26/2022] [Indexed: 10/18/2022]
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Aymée L, Gregg WRR, Loureiro AP, Di Azevedo MIN, Pedrosa JDS, Melo JDSLD, Carvalho-Costa FA, de Souza GN, Lilenbaum W. Bovine Genital Leptospirosis and reproductive disorders of live subfertile cows under field conditions. Vet Microbiol 2021; 261:109213. [PMID: 34481272 DOI: 10.1016/j.vetmic.2021.109213] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 08/22/2021] [Indexed: 11/24/2022]
Abstract
Bovine genital leptospirosis (BGL) is characterized by silent chronic reproductive disorders, most related to early embryonic death leading to estrus repetition, subfertility and abortions. However, most studies were conducted in slaughterhouses, which lacks reproductive and sanitary history of the studied animals. This study aimed to evaluate the occurrence of Leptospira sp. infection in live cows with history of low reproductive efficiency. Blood, urine, cervico-vaginal mucus and uterine fragment were collected from nine cows of the same herd presenting reproductive failure (abortions, estrus repetition and chronic infertility). Serology (MAT) and molecular analysis (PCR and nucleotide sequencing) were performed. Serology showed three (33.3%) seroreactive cows, two to Sejroe and one to Icterohaemorrhagiae serogroups. Six cows (66.7%) presented leptospiral DNA on genital samples, while all urine samples were negative. L. interrogans was identified in five samples, very closely related to strains from Sejroe (n = 3) and Icterohaemorrhagiae (n = 2) serogroups, while L. noguchii was identified in one sample. Results from this preliminary study demonstrates the presence of leptospires on uterus and reinforces the negative impact of leptospiral infection on reproductive tract, highlighting its association with reproductive failures on live animals.
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Affiliation(s)
- Luiza Aymée
- Laboratory of Veterinary Bacteriology, Biomedical Institute, Federal Fluminense University, Niterói, Rio de Janeiro, Brazil
| | | | - Ana Paula Loureiro
- Laboratory of Veterinary Bacteriology, Biomedical Institute, Federal Fluminense University, Niterói, Rio de Janeiro, Brazil; Estácio de Sá University, Rio de Janeiro, Brazil
| | | | - Juliana de Souza Pedrosa
- Laboratory of Veterinary Bacteriology, Biomedical Institute, Federal Fluminense University, Niterói, Rio de Janeiro, Brazil
| | | | | | - Guilherme Nunes de Souza
- Laboratory of Veterinary Bacteriology, Biomedical Institute, Federal Fluminense University, Niterói, Rio de Janeiro, Brazil; Brazilian Agricultural Research Corporation (Embrapa), Juiz de Fora, Minas Gerais, Brazil
| | - Walter Lilenbaum
- Laboratory of Veterinary Bacteriology, Biomedical Institute, Federal Fluminense University, Niterói, Rio de Janeiro, Brazil.
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