The US Centers for Disease Control and Prevention (CDC) says it's tracking a rise in stomach illnesses caused by infections with "extensively drug-resistant" Shigella bacteria. Shigella is resistant to multiple antibiotics including azithromycin, ciprofloxacin, and ceftriaxone.
According to CDC data, there are about 450K shigellosis infections every year in the US, resulting in an estimated $93M in direct medical costs. The agency also reported that 5% of infections were "extensively drug-resistant" in 2022, up from zero cases in 2015.
Though developing countries with poor water quality will be hit hardest by an increase in Shigella cases, the virus itself is, in general, a relatively minor threat. Good hygiene, rest, and hydration are key. Scientists are also, albeit in the beginning stages, working on a vaccine to prevent infection in the first place.
Shigellosis does go away after some rest for most people, but a rise in drug-resistant cases should still alarm us. For immunocompromised patients — such as those with untreated HIV or who are undergoing chemotherapy — there are real risks of serious illness and hospitalization.