What do Argentine scientists know about hantavirus so far?

What do Argentine scientists know about hantavirus so far? Edited by Andrew Zinin, Lead Editor.

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The Andes strain of hantavirus typically circulates via rodents in Argentina, particularly long-tailed rats known as Oligoryzomys longicaudatus. However, human-to-human transmission has occurred on the MV Hondius cruise ship, raising concerns about potential spread within communities.

According to biologist Raul Gonzalez Ittig from Conicet, cases may be linked to the El Niño phenomenon, which caused heavy rains and vegetation growth in Patagonia. This led to an increase in rodent populations but did not necessarily result in outbreaks. Drought and fires typically cause rodent populations to decline.

Rodents are the primary carriers of hantavirus, with close contact required for human-to-human transmission. Epidemiologist Rodrigo Bustamante notes that such transmissions occur between household members through prolonged, direct exposure under one meter. However, this is an exceptional event rather than a common occurrence.

Scientists have ruled out recent mutations as the cause of human-to-human transmission. Each hantavirus has evolved independently with its rodent host over time without significant genetic changes. The exact mechanisms behind transmission chains remain unknown.

Due to the rarity of cases, drawing definitive conclusions about hantavirus in Argentina is challenging. Scientists from the Malbran Institute will lead a fact-finding mission to Ushuaia next week to investigate potential virus presence and spread.

In recent years, Argentina has recorded 102 hantavirus cases during the current epidemiological season, compared to 57 cases in the previous year. This increase highlights the need for further research and preventive measures.

Understanding hantavirus transmission is crucial for public health. Close monitoring of rodent populations and human-to-human contact can help mitigate risks associated with this rare but potentially deadly respiratory disease.