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The shorter and milder winters, warming oceans, altered precipitation patterns, and extreme weather of climate change are fueling the spread of infectious diseases, experts warn today in JAMA. Infectious-disease physicians from Massachusetts General Hospital (MGH) and the University of California Davis (UCD) noted that the past decade saw 9 of the 10 warmest years on record, along with severe heat, droughts, wildfires, floods, and hurricanes. (Van Beusekom, 3/20)

Numbers are continuing to climb when it comes to a bacterial outbreak that Santa Cruz County public health officials have been battling for weeks. As of Monday, there were 37 confirmed cases of shigellosis in the county, primarily in the North County region among individuals experiencing homelessness, county Health Officer Lisa Hernandez told the Sentinel. That is an increase of 10 overall cases since late February. (Hattis, 3/20)

Because widespread measles outbreaks have been rare, most Americans, including doctors, may not recognize the vibrant red rash that accompanies respiratory symptoms in a measles infection. They may have forgotten the impact of the disease on individuals and communities. “Most of our local health department folks have never seen a measles outbreak,” said Dr. Christine Hahn, state epidemiologist of Idaho, which contained a small cluster of cases last year. (Mandavilli, 3/20)

Yesterday in Emerging Infectious Diseases, Centers for Disease Control and Prevention (CDC) researchers described the cases of eight US children who died of acute hepatitis of unknown cause—half of whom tested positive for adenovirus—from October 2021 to June 2023. (Van Beusekom, 3/20)

�鶹Ů�� Health News: Rapid Rise In Syphilis Hits Native Americans Hardest

From her base in Gallup, New Mexico, Melissa Wyaco supervises about two dozen public health nurses who crisscross the sprawling Navajo Nation searching for patients who have tested positive for or been exposed to a disease once nearly eradicated in the U.S.: syphilis. Infection rates in this region of the Southwest — the 27,000-square-mile reservation encompasses parts of Arizona, New Mexico, and Utah — are among the nation’s highest. (Nowell, 3/21)

The World Health Organization (WHO) said today in an outbreak notice that 13 countries in Africa have reported confirmed or probable yellow fever cases since the start of 2023. It urged countries to increase surveillance because of the potential for onward transmission through travel and the presence of mosquitoes in neighboring countries that are capable of spreading the disease. (Schnirring, 3/20)