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Polymerase Chain Reaction and blood culture for diagnosis of canine sepsis/Reacao em Cadeia da Polimerase e hemocultura para diagnostico de sepse canina

Sepsis is characterized by the presence of organ dysfunction secondary to the dysregulated systemic inflammatory response associated with an infection, and has high mortality rates. Traditional diagnostic techniques based on non-microbiological isolation are time-consuming and may delay treatment. T...

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Bibliographic Details
Published in:Ciência rural 2018-06, Vol.48 (6)
Main Authors: da Silveira, Marcelo Marques, Candido, Stefhano Luis, dos Santos, Karin Rinaldi, Maia, Maerle Oliveira, de Souza, Roberto Lopes, Sousa, Valeria Regia Franco, de Almeida, Arleana do Bom Parto Ferreira, Dutra, Valeria, Nakazato, Luciano
Format: Article
Language:English
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Summary:Sepsis is characterized by the presence of organ dysfunction secondary to the dysregulated systemic inflammatory response associated with an infection, and has high mortality rates. Traditional diagnostic techniques based on non-microbiological isolation are time-consuming and may delay treatment. Thus, this study aimed to compare bacterial and fungal broad-range polymerase chain reaction (PCR) and blood culture for diagnosis of sepsis in dogs. Blood samples from 88 dogs with suspected sepsis were analyzed by blood culture, and PCR to detect bacterial and fungal DNA. On blood culture, 20 (22.7%) samples tested positive for bacterial isolates; however, none tested positive for fungi. Through PCR analysis, bacterial DNA was detected in 46 (52.3%) animals, whereas fungal DNA was present in one (1.1%) sample. Our results showed that PCR-based testing has important diagnostic value for canine blood infections because it has a shorter turnaround time and higher sensitivity than traditional blood culture. Key words: blood culture, PCR, bacteremia, fungemia. Sepse se caracteriza pela presenca de disfuncao organica secundaria a resposta inflamatoria sistemica desregulada, associada a uma infeccao com elevadas taxas de mortalidade. As tecnicas tradicionais baseadas no isolamento microbiologico sao demoradas e podem atrasar o tratamento. O objetivo deste estudo foi comparar a Reacao em Cadeia da Polimerase (PCR) bacteriana e fungica e hemocultura em caes com sepse. Foram analisadas 88 amostras de sangue de caes com suspeita de sepse por meio de hemocultura e PCR para detectar DNA bacteriano e fungico. Nas culturas sanguineas, 20 (22,7%) amostras foram positivas para isolados bacterianos. No entanto, nenhuma amostra foi positiva para fungos. Atraves da analise por PCR, o DNA bacteriano foi detectado em 46 animais (52,3%), enquanto que o DNA fungico estava presente em uma amostra (1,1%). Neste caso, a PCR apresenta importante valor diagnostico em caes com infecoes sanguineas devido a sua rapidez e maior sensibilidade do que a isolamento por hemocultura. Palavras-chave: Hemocultura, PCR, bacteremia, fungemia.
ISSN:0103-8478
DOI:10.1590/0103-8478cr20170871