Comparison of the performance of polymerase chain reaction and pp65 antigenemia for the detection of human cytomegalovirus in immunosuppressed patients Comparação de métodos para detecção de infecção por citomegalovírus em pacientes imunossuprimidos

• Main Authors: Patrícia Borba Martiny, Fernanda de-Paris, Alice Beatriz Mombach Pinheiro Machado, Ricardo Obalski de Mello, Martha Bergman Senger, Maria Clara Medina Corrêa, Luiz Carlos Werres Junior, Carolina Fischinger Moura de Souza
• Format: Article in Journal/Newspaper
• Language: English
• Published: Sociedade Brasileira de Medicina Tropical (SBMT) 2011
• Subjects: Citomegalovírus humano; Antigenemia; em cadeia da polimerase; Pacientes imunossuprimidos; Terapia preemptiva; Humancytomegalovirus; Polymerase chain reaction; Immunosuppressed patients; Preemptive therapy; Arctic medicine. Tropical medicine; RC955-962; Arctic
• Online Access: https://doaj.org/article/5a438704bda04d2993ee0c693e6afc79

INTRODUCTION: Human cytomegalovirus (HCMV) is often reactive in latently infected immunosuppressed patients. Accordingly, HCMV remains one of the most common infections following solid organ and hemopoietic stem cell transplantations, resulting in significant morbidity, graft loss and occasional mortality. The early diagnosis of HCMV disease is important in immunosuppressed patients, since in these individuals, preemptive treatment is useful. The objective of this study was to compare the performance of the in-house qualitative polymerase chain reaction (PCR) and pp65 antigenemia to HCMV infection in immunosuppressed patients in the Hospital de Clínicas of Porto Alegre (HCPA). METHODS: A total of 216 blood samples collected between August 2006 and January 2007 were investigated. RESULTS: Among the samples analyzed, 81 (37.5%) were HCMV-positive by PCR, while 48 (22.2%) were positive for antigenemia. Considering antigenemia as the gold standard, sensitivity, specificity, positive predictive values and negative predictive values for PCR were 87.5%, 76.8%, 51.8% and 95.5% respectively. CONCLUSIONS: These results demonstrated that qualitative PCR has high sensitivity and negative predictive value (NPV). Consequently PCR is especially indicated for the initial diagnosis of HCMV infection. In the case of preemptive treatment strategy, identification of patients at high-risk for HCMV disease is fundamental and PCR can be useful tool. INTRODUÇÃO: O citomegalovírus humano (HCMV), causador de infecção latente, reativa com frequência em pacientes imunossuprimidos. Portanto, o HCMV permanece uma das infecções mais comuns após transplantes de órgãos sólidos e de células hematopoiéticas resultando em significativa morbidade, perda do enxerto e ocasional mortalidade. Assim, o diagnóstico precoce para uma terapia preventiva é de grande importância. Este estudo visa comparar o desempenho dos métodos PCR qualitativo in-house e antigenemia pp65 para o diagnóstico de infecção por CMV em pacientes imunossuprimidos do Hospital de ...