The County of San Diego has announced three new shigella cases associated with an ongoing outbreak, bringing the total to 38 confirmed and three probable cases among people experiencing homelessness.

The continuing investigation shows onset of illness dates between Aug. 16 and Nov. 8, 2021, with the four new cases occurring between Oct. 23 and Nov. 8, 2021. The 41 cases in this outbreak represent 11% of the 349 total cases reported to date in San Diego County.

The cases are primarily among individuals experiencing homelessness, with the majority at multiple locations in central San Diego. A case with a known address outside the City of San Diego is being investigated to determine where that individual was residing when they contracted the disease. No source of the outbreak has currently been identified.