Iran reports 500% increase in Crimean-Congo Hemorrhagic Fever cases in 2022


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Iranian health officials reported a significant increase in Crimean and Congo hemorrhagic fever (CCHF) cases in deaths in 2022 compared to recent years.

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Since March, Iran has reported 78 cases of CCHF, including nine deaths.

Last year (March 2021 – March 2022), 13 people were diagnosed with CCHF in the country, an increase of 500 percent, of whom two died. One year ago, CCHF infected 40 people and claimed 5 lives.

Crimean-Congo hemorrhagic fever is a widespread disease caused by a tick-borne virus (neurovirus) follower buniferide family. CCHF causes severe outbreaks of viral hemorrhagic fevers, with a fatality rate of 10–40%.

Animals become infected by the bite of an infected tick and the virus remains in the bloodstream for about a week after infection, allowing the tick-animal-tick cycle to continue when another tick bites. Although a number of genera of ticks are capable of infecting CCHF, only ticks from the genus Hialoma It is the main vector.

CCHF is transmitted to people either through tick bites or through contact with infected animal blood or tissue during and immediately after slaughter. The majority of cases have occurred in people involved in the livestock industry, such as agricultural workers, slaughterhouse workers, and veterinarians. Human-to-human transmission is possible.

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