India: Elevated dengue fever activity statewide in Bihar through October

Event

Health officials report increased dengue fever activity in Bihar State, where more than 11,670 cases were reported Jan. 1-Oct. 19. In 2022, only 1,896 cases were reported over a similar period. Most affected area is Patna followed by Munger, Saran, Bhagalpur, and Begusarai. Daily spraying and fogging continue in these areas to prevent further disease transmission. This report represents the complete data available as of Oct. 19.

Context

Dengue fever is considered a year-round and nationwide risk in India, with the highest risk typically June-September. Authorities reported approximately 30,630 cases nationwide in 2022 and 177,695 cases in 2021.

There are two dengue fever vaccines, Dengvaxia and Qdenga. It is only recommended for individuals with a history of dengue infection and in a country with high dengue fever burden. Dengue fever is transmitted through the bite of an infected mosquito. Risk of infection is often highest in urban and semi-urban areas. Symptoms of dengue fever include a sudden onset of fever and at least one of the following: severe headache, severe pain behind the eyes, muscle and/or joint pain, rash, easy bruising, and/or nose or gum bleeding. Symptoms typically appear 5-7 days after being bitten, but can develop up to 10 days after exposure. Dengue fever can progress to a more severe form known as dengue hemorrhagic fever (DHF). DHF can be fatal if it is not recognized and treated in a timely manner.

Advice

If you have been previously infected with dengue fever, consult with your physician regarding vaccination. Avoid mosquito bites and remove standing water to reduce the number of biting mosquitoes. Seek medical attention if symptoms develop within two weeks of being in affected areas. Do not use aspirin or ibuprofen products if dengue fever is suspected, as these could exacerbate bleeding tendencies associated with the disease.