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© Institut Pasteur
Spirochète : bactérie hélicoïdale, flexible et ondulante de longueur variable, non colorable par la coloration de Gram, très mobile (endoflagelles). Trois familles : Spirochaetaceae, Leptospiraceae, et Brachyspiraceae. Principaux genres pathogènes pour l'homme : Borrelia (Borrelia burgdorferi cause de la maladie de Lyme), Treponema (Treponema pallidum cause de la syphillis), Leptospira (Leptospira interrogans serovar icterohaemorrhagiae cause de la maladie de Weil). Image colorisée.
Publication : Research in veterinary science

Molecular analysis of leptospires from serogroup Sejroe obtained from asymptomatic cattle in Rio de Janeiro – Brazil reveals genetic proximity to serovar Guaricura

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Research in veterinary science - 23 Feb 2016

Loureiro AP, Hamond C, Pinto P, Bremont S, Bourhy P, Lilenbaum W

Link to Pubmed [PMID] – 27033941

Res. Vet. Sci. 2016 Apr;105:249-53

Bovine leptospirosis causes substantial reproductive failure in cattle, mainly due to infections with serovar (sv) Hardjo infection. Notwithstanding, other serovars from the serogroup (sg) Sejroe could also have important roles in bovine leptospirosis. The objective was to investigate genetic diversity of serogroup Sejroe isolates obtained from asymptomatic cattle in the state of Rio de Janeiro, Brazil. Urine and vaginal fluid (VF) were collected from clinically healthy cattle immediately after slaughter. Five isolates were recovered and characterized (serogrouping) as belonging to sg Sejroe. Sequencing of rrs and secY genes further identified them as Leptospira santarosai. Analysis of secY sequences indicated a high level of sequence homology to sv Guaricura strains. Based on culture and sequence data, we inferred that other members of sg Sejroe may be important in bovine leptospiral infection, particularly genotypes of L. santarosai serovar Guaricura.

http://www.ncbi.nlm.nih.gov/pubmed/27033941