Health officials in US are closely monitoring a growing cyclosporiasis after hundreds of infections were reported across multiple states, including Michigan and Pennsylvania. As concerns rise, many Americans are asking: what is cyclosporiasis, cyclosporiasis symptoms, how does it transmit, how long does it last, and why are health authorities paying such close attention to this parasitic infection?ALSO READ: Mitch McConnell brain dead, not coming back: Trump aide Laura Loomer According to the US Centers for Disease Control and Prevention (CDC), cyclosporiasis is caused by a microscopic parasite known as Cyclospora, which can trigger severe digestive symptoms and, in some cases, may also require hospitalization.ALSO READ: What happened to Nolan Xavier Wells?The question what is cyclosporiasis has become increasingly common as health agencies investigate the latest outbreak. Cyclosporiasis is an intestinal illness caused by the parasite Cyclospora cayetanensis. People become infected after consuming contaminated food or water. The disease is often associated with fresh produce such as leafy greens, herbs, berries and vegetables that may have come into contact with contaminated water or soil.The current cyclosporiasis in US outbreak has drawn national attention because investigators have not yet identified a single source responsible for all reported cases. Health authorities continue to trace possible links while monitoring infections across multiple states.Cyclosporiasis in Michigan and PennsylvaniaThe recent surge in cyclosporiasis in US cases has been particularly noticeable in Michigan, where health officials reported around 300 infections by early July—far above the state's typical annual average. Cases have also been reported in Pennsylvania as part of the broader multistate investigation.The expanding cyclosporiasis in US outbreak has affected numerous states, including Alaska, Colorado, Connecticut, Florida, Georgia, Illinois, Louisiana, Massachusetts, Michigan, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Tennessee, Texas, Virginia and Wisconsin. Federal and state investigators continue to search for the source of contamination.What is cyclosporiasis?Understanding what is cyclosporiasis begins with understanding the parasite behind it. Cyclospora is a microscopic organism that infects the small intestine. Once inside the body, it can cause inflammation and interfere with normal digestion.Unlike many foodborne illnesses caused by bacteria, cyclosporiasis in US cases involve a parasite that follows a unique transmission cycle. The parasite is shed in human stool but does not become infectious immediately. Instead, it requires time in the environment before it can infect another person. According to the CDC, this process typically takes one to two weeks.How does cyclosporiasis transmit?One of the most important questions surrounding what is cyclosporiasis is how it spreads. According to the CDC, people become infected after consuming food or water contaminated with fecal matter containing Cyclospora. However, direct person-to-person transmission is considered unlikely because the parasite needs time outside the body before becoming infectious.This means the current cyclosporiasis in US outbreak is more likely linked to contaminated food products, agricultural water sources or produce handling practices rather than direct contact with infected individuals.Fresh fruits, vegetables, herbs and salad ingredients have been linked to previous outbreaks. Investigators are examining whether similar factors may be contributing to the current situation.What are the symptoms of cyclosporiasis?When discussing what is cyclosporiasis, symptoms are often the biggest concern. The infection is sometimes nicknamed the "explosive diarrhea parasite" because severe watery diarrhea is one of its most common symptoms.Other symptoms associated with cyclosporiasis in US cases may include:Frequent watery diarrheaLoss of appetiteWeight lossNauseaStomach crampsBloatingFatigueLow-grade feverIncreased gasSymptoms usually appear about a week after exposure, although the timing can vary from person to person.How long does cyclosporiasis last?Many people searching what is cyclosporiasis also want to know how long the illness can persist.Without treatment, symptoms may last for several days, weeks or even longer. Some patients experience recurring symptoms that improve and then return. Health experts note that untreated infections can sometimes continue for a month or more, causing significant discomfort and disruption to daily life.The duration of cyclosporiasis in US cases often depends on factors such as an individual's immune system, overall health and whether prompt medical treatment is received.Who is most affected by the current outbreak?Health officials investigating the latest cyclosporiasis in US outbreak reported that patients ranged in age from 5 to 86 years old, with an average age of around 42. Women accounted for a majority of reported cases.While many people recover fully, some infections become serious enough to require hospitalization. The CDC reported multiple hospitalizations linked to the current outbreak, underscoring why public health authorities are taking the situation seriously.Can cyclosporiasis be prevented?Learning what is cyclosporiasis also involves understanding prevention. Because infections are commonly linked to contaminated produce, health experts recommend thoroughly washing fruits and vegetables before consumption. However, washing alone may not always eliminate the parasite.Food safety measures throughout the supply chain—from farms and irrigation systems to transportation and retail handling—play an important role in reducing the risk of cyclosporiasis in US outbreaks.Consumers should also stay informed about food recalls and public health advisories if investigators identify a contaminated product connected to the outbreak.Why health officials are concernedThe growing cyclosporiasis in US outbreak highlights the challenges of tracking foodborne parasitic infections. Unlike outbreaks tied to a single restaurant or food product, Cyclospora investigations can be complex because contaminated produce may travel across states and international supply chains before reaching consumers.As federal and state agencies continue their investigation, understanding what is cyclosporiasis, recognizing symptoms and following food safety recommendations remain important steps for reducing risk.