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Polymerase Chain Reaction and blood culture for diagnosis of canine sepsis
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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Published in: | Ciência rural 2018-01, Vol.48 (6) |
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Main Authors: | , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
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Online Access: | Get full text |
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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.
RESUMO: Sepse se caracteriza pela presença de disfunção orgânica secundária à resposta inflamatória sistêmica desregulada, associada a uma infecção com elevadas taxas de mortalidade. As técnicas tradicionais baseadas no isolamento microbiológico são demoradas e podem atrasar o tratamento. O objetivo deste estudo foi comparar a Reação em Cadeia da Polimerase (PCR) bacteriana e fúngica e hemocultura em cães com sepse. Foram analisadas 88 amostras de sangue de cães com suspeita de sepse por meio de hemocultura e PCR para detectar DNA bacteriano e fúngico. Nas culturas sanguíneas, 20 (22,7%) amostras foram positivas para isolados bacterianos. No entanto, nenhuma amostra foi positiva para fungos. Através da análise por PCR, o DNA bacteriano foi detectado em 46 animais (52,3%), enquanto que o DNA fúngico estava presente em uma amostra (1,1%). Neste caso, a PCR apresenta importante valor diagnóstico em cães com infeções sanguíneas devido a sua rapidez e maior sensibilidade do que a isolamento por hemocultura. |
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ISSN: | 0103-8478 1678-4596 1678-4596 |
DOI: | 10.1590/0103-8478cr20170871 |