Hantavirus cases will increase rapidly in 2021
Compared to the same period last year, Hantavirus cases increased by 10 times and even surpassed the 2017 record.

The extent of the extreme volatility in the number of cases 2001-2020 can be traced back to food supplies and climatic factors in particular. Bank mice benefit in the so-called fattening years (Myodes glareolus), The main carriers of hantavirus, especially regional oversupply such as oak and pecanote. Usually oaks are fattened every 5-10 years, and beech every 3-6 years.

Since droughts strongly stimulate fruit production, climate change reduces the gap between grow-out years. In 2020, after 2016, there was a year of oak fattening in the southwest, which is the region with the largest number of cases in 2021. Especially in Reutlingen, infections rose dramatically, like look at Map overview From Proplanta Offers. The reason for the increase in the number of cases in 2021 could also be due to the Covid-19 pandemic, as people are often outdoors (forests and parks) and thus become more infected.

As a rule, hantaviruses are transmitted indirectly to humans through the respiratory system through inhalation of virus-containing dust. Infection can also occur through droplets on contaminated food and through infected skin contact with contaminated dust. Direct transmission is also possible through bites or after contact with live or dead rodents or their excretions (saliva, urine, and feces).

Hantaviruses remain infectious outside the host, even when they have dried up for up to two weeks. Person-to-person transmission of hantaviruses does not occur with viral variants occurring in Europe and Asia. The risk of infection is greatest between April and September.

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Depending on the type of virus, hantavirus infection can cause serious illness in humans. The usual course of the disease is a sudden onset of fever that lasts for 3-4 days and is often accompanied by nonspecific flu-like symptoms such as headache and muscle pain. Hemorrhagic courses with acute renal failure are rather rare (<1%). It is possible that surviving infection will lead to special lifelong immunity to the virus.

Because there is no approved vaccine or treatment specifically targeted against the virus, one of the most important measures to avoid Hantavirus infection is exposure prevention.

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