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In this study, whole blood samples and ticks were collected from 57 capybaras in recreational areas in the Federal District, Brazil, aiming to investigate the presence of Rickettsia spp. using polymerase chain reaction (PCR) and indirect immunofluorescence (IFAT) assays. None of the capybara blood samples yielded rickettsial DNA by PCR. Among 55 capybara serum samples tested by IFAT, 53 (96.3%) reacted to Rickettsia spp. Among these, 21 (39.6%) identified the R. bellii antigen as the probable antigen involved in a homologous reaction (PAIHR), whereas 2 (3.8%) identified the R. parkeri antigen. Ticks collected from capybaras were identified as 173 Amblyomma sculptum and 410 A. dubitatum, in addition to nine Amblyomma spp. larvae. A sample of 231 ticks was subjected to DNA extraction and PCR for Rickettsia species. None of 122 A. sculptum yielded rickettsial DNA. Molecular evidence of R. bellii was found in 25/108 (23.1%) and of Rickettsia sp. strain Cooperi (R. parkeri-like agent) in 2/108 (1.9%) of the A. dubitatum samples. These results suggest a greater exposure to R. bellii in these capybara populations, in addition to a more significant number of A. dubitatum, which might characterize the Federal District region as not endemic for Brazilian spotted fever.

Prevalence of Enterobacteriaceae in Tupinambis merianae (Squamata: Teiidae) from a captive facility in central Brazil, with a profile of antimicrobial drug resistance in Salmonella enterica. The present study reports the presence of Enterobacteriaceae in tegu lizards (Tupinambis merianae) from a captive facility in Central Brazil. From a total of 30 animals, 10 juveniles and 20 adults (10 females, 10 males), 60 samples were collected, in two periods separated by 15 days. The samples were cultivated in Xylose-lysinedeoxycholate agar (XLT4) and MacConkey agar. The Salmonella enterica isolates were tested for antimicrobial susceptibility. A total of 78 bacteria was isolated, of which 27 were from juveniles of T. merianae, 30 from adult males, and 21 from adult females. Salmonella enterica was the most frequent bacteria, followed by Citrobacter freundii, Escherichia coli, Enterobacter sakasakii, Kluivera sp., Citrobacter amalonaticus, Serratia marcescens, Citrobacter diversus, Yersinia frederiksenii, Serratia odorifera, and Serratia liquefaciens. Salmonella enterica subsp. diarizonae and houtenae showed resistance to cotrimoxazole, and serum Salmonella enterica Worthington showed resistance to tetracycline and gentamicin. Salmonella enterica Panama and S. enterica subsp. diarizonae showed intermediate sensitivity to cotrimoxazole. In addition to Enterobacteriaceae in the tegu lizard, pathogenic serotypes of S. enterica also occur, and their antimicrobial resistance was confirmed.Keywords: Antibiotic sensitivity, enteric bacteria, reptiles, salmonellosis, serovars. 58Phyllomedusa

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