Daijiworld Media Network – Michigan

Michigan, Jul 9: Nearly 1,000 people in the US state of Michigan have been diagnosed with cyclosporiasis, a parasitic infection that causes prolonged watery diarrhoea, marking the largest outbreak of its kind in the state's history, health officials said.

According to state authorities, 992 cases have been reported since late June, with around 40 patients requiring hospitalisation. No deaths have been reported.

The outbreak has primarily affected southeastern Michigan, where officials usually record only about 50 cases of the infection each year. Neighbouring Ohio has also reported a surge in cases, with more than 500 infections recorded in the northwestern part of the state, including 306 in Lucas County.

Health officials said the source of the outbreak has not yet been identified, while investigations into similar illnesses are underway across 28 US states.

Cyclospora is a microscopic parasite that infects the intestines and commonly causes watery diarrhoea, abdominal cramps, nausea, fatigue and loss of appetite. The illness is generally treated with antibiotics and is rarely life-threatening.

According to experts, the parasite is usually transmitted through food or water contaminated with human waste. Previous outbreaks have been linked to contaminated fresh produce, including leafy vegetables, basil and berries.

Officials said identifying the exact source of infection can be difficult because contaminated ingredients are often used in multiple food items, and the parasite cannot be easily cultured in laboratories.

The US Centers for Disease Control and Prevention (CDC) said thousands of cyclospora infections are reported across the country each year, although many cases may go undetected due to limited testing.

Michigan health authorities have advised residents to seek medical attention if diarrhoea persists for several days and to take precautions while handling fresh produce.

As investigations continue, officials have recommended purchasing whole heads of lettuce instead of pre-packaged salad mixes, removing the outer leaves before washing thoroughly under running water and cooking vegetables whenever possible to reduce the risk of infection.