Antibiotic-Resistant Shigella Poses Growing Challenge

Recent research highlights a worrying development in the fight against a highly contagious gut infection known as Shigella. This infection, which can spread through sexual contact, is becoming increasingly difficult to treat due to antibiotic resistance.

Shigella Resistant Strains on the Rise

A report by the Centers for Disease Control and Prevention (CDC) analyzed almost 17,000 Shigella samples gathered between 2011 and 2023. It was found that 8.5% of the samples in 2023 were classified as extensively drug-resistant (XDR), resistant to all five antibiotics used for treatment. This marks a significant increase from 2011 to 2015, when no such cases were reported.

Dr. Tyler Evans, an infectious disease expert, stated that while the number of infections has not surged, the bacteria are becoming more resistant to available treatments. He emphasized the risk of dwindling treatment options even with steady infection rates.

Transmission and Affected Populations

“Shigella is not widely recognized as a sexually transmitted infection,” said Dr. Andi Toufexis, a family medicine specialist focused on sexual health. However, the bacteria can spread during sexual activity if fecal matter is involved.

The CDC analysis notes that most XDR Shigella cases occur in adult men. While specific transmission modes were not detailed, prior research identifies sexual contact among men who have sex with men as a key transmission route. A significant portion of affected individuals with known HIV status was living with HIV, highlighting a vulnerable group.

Children under five years are also at higher risk. The CDC links U.S. outbreaks to childcare settings, with previous strains being treatable by antibiotics. Approximately 37.6% of cases with hospitalization data needed hospitalization due to the resistant infection, but no fatalities were reported in the recent analysis.

Prevention and Precautionary Measures

Dr. Evans advises concern, not panic, among Americans. Most infections resolve without intervention, but severe cases may require medical attention.

Dr. Michael Aziz advises against using antidiarrheal medications like Imodium for suspected Shigella. “Flush out the bacteria,” he recommends, urging those with symptoms to seek medical guidance.

Preventive steps include washing hands and genital areas before and after intimate contact, employing condoms or dental dams, and cleaning sex toys regularly. If diarrhea is present, it’s advisable to abstain from sex until two weeks after symptoms cease, Dr. Toufexis suggests.