Arenavirus Infections

Infecciones por arenavirus

The infectious syndromes associated with arenaviruses in South America are four: febrile syndrome of viral origin; Haemorrhagic fevers with or without neurological involvement; Aseptic meningitis and meningo-encephalitis. Among the Arenavirus of the new world is the Tacaribe complex where the viruses are found: Junín (Argentina), Guanarito (Venezuela), Machupo (Bolivia) and Sabiá (Brazil), which are characterized by hemorrhagic fevers. In Colombia the arenavirus Pichindé was isolated in 1965, from the rodent Oryzomys albigularis, in the valley of Pichindé (Valle del Cauca). This arenavirus produces a persistent infection in its host and is not pathogenic for the man. There is evidence of the circulation of the Guanarito virus in rodents from Córdoba, but there are no cases diagnosed in humans; In Colombia, the genome of the lymphocytic choriomeningitis virus was detected in the brains of rodents Mus musculus. The diagnosis is based on the knowledge of local epidemiology and the suspicion of a patient with fever in endemic areas, where infections such as malaria, dengue and leptospirosis, sepsis of bacterial origin and rickectomy have been excluded. Virus isolation in the feverish period is the gold standart, but it implies contact with the virus that is highly infectious, which represents a public health problem. Serology has been used for diagnosis, but there is no commercial evidence and only research groups and large public health laboratories have these tests. Most of the patients present a moderate severity, which needs adequate hydration, antipyretics and anti-inflammatories. All patients with severe signs should be aggressively treated. The use of drugs has not demonstrated a decrease in mortality but a significant reduction in viremia.

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