Fascioliasis is a parasitic infection caused by liver flukes, primarily *Fasciola hepatica* or *Fasciola gigantica*. It affects humans and various grazing animals, being most common in regions with livestock farming and specific freshwater snails. The flukes primarily inhabit the bile ducts and liver. Track Fascioliasis activity and outbreaks specific to South Dakota.
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Liver flukes were recognized in livestock centuries ago, with *Fasciola hepatica* first described in sheep in the 16th century. Human cases gained clearer understanding in the 19th and 20th centuries as the parasite's life cycle and transmission routes were elucidated. It has long been a significant cause of economic losses in livestock and an underestimated public health problem.
Humans contract Fascioliasis by ingesting metacercariae, the infective larval stage, which are typically found encysted on raw or undercooked aquatic plants (like watercress) or in contaminated water. After ingestion, metacercariae excyst in the intestine, penetrate the gut wall, and migrate through the peritoneal cavity to the liver, eventually settling in the bile ducts where they mature. Freshwater snails serve as the intermediate hosts in the parasite's life cycle.
Contagious Period: Varies by disease
Local health department information and state-specific prevention guidance
Our AI-powered surveillance continuously monitors Fascioliasis activity across South Dakota. We track data from state health departments, local hospitals, CDC reports, and 50+ global health sources to provide early warning of emerging threats.
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For official state health alerts, vaccination locations, and public health guidance specific to South Dakota, visit your state health department's website.
Whether you live in South Dakota, are traveling there, or have family in the state, understanding Fascioliasis prevention is essential. Follow these evidence-based prevention measures:
If you experience symptoms of Fascioliasis in South Dakota, contact your healthcare provider immediately. Early diagnosis and treatment improve outcomes significantly.
Emergency symptoms: If you experience severe symptoms, difficulty breathing, or signs of dehydration, call 911 or go to your nearest emergency room.
Trusted information from leading health organizations
Global disease surveillance and guidelines from the World Health Organization
View WHO Resources →Disease information on Virus Watcher is reviewed by our Chief Epidemiologist, a former CDC lead analyst for FluSight forecasting. Outbreak data is aggregated from verified sources including BEACON, ProMED, WHO, CDC, and 50+ national health agencies. This information is for educational purposes and should not replace professional medical advice.
Last reviewed: 2026-06-03
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