Dengue and meningococcal disease are caused by two different agents: a flavivirus and a Gram-negative bacterium, respectively. The first symptoms of both diseases can be indistinct and a rapid and accurate diagnosis is crucial, considering that both diseases are associated with high morbidity and mortality, representing a major public-health problem in Brazil.

Case presentation:

We report a fatal case of co-infection of dengue virus (DENV) and in a 54-year-old patient. The serum tested positive for DENV NS1 antigen, and serogroup C was detected by -PCR. Following the initial positive result for DENV infection, rRT-PCRwas performed and DENV-4 was confirmed.


Our report highlights the importance of accurate differential diagnosis during periods of high circulation of DENV, in order to provide adequate management and an improved outcome.


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