Leptospira interrogans infection in tegu lizard (Tupinambis merianae), Brazil

Fernandes, Juciê Jales; Pinheiro, Tiago Junior; Costa, Diego Figueiredo da; Júnior, João Pessoa Araújo; Malossi, Camila Dantas; Ullmann, Leila Sabrina; Silva, Maria Luana Cristiny Rodrigues; Azevêdo, Sérgio Santos de; Alves, Clebert José; Higino, Severino Silvano dos Santos

doi:10.1590/0103-8478cr20200424

Cited by 4 publications

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“…In cattle, this disease is more associated with subfertility and early embryonic death when the serovars is host-adapted, such as serovar Hardjo [ 6 ]. Studies conducted in the semiarid region of Brazil have suggested that both domestic [ 7 , 8 , 9 , 10 , 11 , 12 ] and wild animals [ 13 , 14 ] present high frequencies of Leptospira spp. This occurs despite the hot and dry climate conditions of this region, which are adverse to the survival of this bacterium in the environment.…”

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confidence: 99%

Bovine Leptospirosis in Caatinga Biome, Brazil: New Insights into Diagnosis and Epidemiology

et al. 2023

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Bovine leptospirosis causes economic losses and raises public health concerns. It is possible that there are peculiarities in the epidemiology of leptospirosis in regions with a semiarid climate, such as the Caatinga biome in Brazil, where the climate is hot and dry, and the etiological agent require alternative routes of transmission. This study aimed to close knowledge gaps to the diagnosis and epidemiology of Leptospira spp. infection in cows from the Caatinga biome, Brazil. Samples of the blood, urinary tract (urine, bladder and kidney) and reproductive tract (vaginal fluid, uterus, uterine tube, ovary and placenta) were collected from 42 slaughtered cows. Diagnostic tests included were the microscopic agglutination test (MAT), polymerase chain reaction (PCR) and bacterial isolation. Anti-Leptospira spp. antibodies were found in 27 (64.3%) of the animals analyzed using MAT at a 1:50 dilution (cut-off 50), while 31 (73.8%) animals had at least one organ/fluid where the presence of Leptospira spp. DNA was identified, and 29 animals (69%) were positive at bacteriological culture. The highest sensitivity values for MAT were obtained at the cut-off point of 50. In conclusion, even under hot and dry climate conditions, it is possible that Leptospira spp. can spread through alternative routes such as venereal transmission; moreover, a cut-off of 50 is recommended for the serological diagnosis of cattle from the Caatinga biome.

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