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Parasitic infections can cause a variety of symptoms in humans, depending on the type of parasite and the affected body system. Common symptoms include:
- Gastrointestinal Disturbances : Many parasites, such as Giardia and roundworms, lead to diarrhea, abdominal pain, nausea, and vomiting. Persistent diarrhea may result in dehydration.
- Weight Loss : Unexplained weight loss can occur due to malabsorption of nutrients, especially with intestinal parasites.
- Fatigue and Weakness : Infections can cause general fatigue and weakness as the body fights off the parasites, often leading to anemia from blood loss in cases of hookworm infections.
- Skin Reactions : Ectoparasites like scabies or lice can cause itching, rashes, and inflammation of the skin.
- Respiratory Symptoms : Some parasites, like certain types of roundworms, can migrate to the lungs, causing coughing or wheezing.
- Neurological Symptoms : Severe cases of parasitic infections, such as neurocysticercosis from tapeworms, can lead to headaches, seizures, and neurological deficits.