Parasitic Infections (Eosinophilia)
What is Parasitic Infections (Eosinophilia)?
Parasitic infections occur when organisms like worms or protozoa invade your body and live off your tissues. Eosinophilia means you have too many eosinophils, a type of white blood cell that fights parasites. When your body detects a parasitic invader, it releases more eosinophils into your bloodstream.
Not all parasitic infections cause eosinophilia, but many worm infections do. Helminth parasites, which include roundworms, hookworms, and tapeworms, trigger your immune system to produce extra eosinophils. A blood test that shows elevated white blood cells with high eosinophil levels can be an early warning sign.
Understanding your white blood cell patterns helps you catch infections before they cause serious damage. Many people carry parasites without knowing it, especially after travel to tropical regions or exposure to contaminated water and food.
Symptoms
- Abdominal pain or cramping
- Diarrhea that may contain blood or mucus
- Unexplained weight loss
- Fatigue and weakness
- Nausea or vomiting
- Skin rashes or itching
- Cough or chest discomfort
- Fever or night sweats
- Visible worms in stool
- Bloating or gas
Some people with parasitic infections have no symptoms for months or years. Others experience mild digestive issues they mistake for food sensitivities. Blood testing can detect elevated eosinophils even when symptoms are absent or subtle.
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Causes and risk factors
Parasitic infections spread through contaminated food, water, soil, or contact with infected people or animals. Eating raw or undercooked meat, especially pork or fish, can introduce worms into your digestive system. Walking barefoot on contaminated soil allows hookworm larvae to enter through your skin. Poor sanitation and handwashing practices increase your risk of transmission.
Travel to tropical and subtropical regions raises your exposure to parasites common in those areas. People with weakened immune systems face higher infection rates. Living in crowded conditions, working with animals, or swimming in contaminated freshwater also increases risk. Children in daycare settings and people who garden without gloves have greater exposure opportunities.
How it's diagnosed
Doctors diagnose parasitic infections through blood tests, stool samples, and imaging studies. A complete blood count with differential reveals elevated white blood cells and high eosinophil percentages. This pattern suggests your immune system is fighting a parasitic invader. Rite Aid testing measures your white blood cell count and can detect the elevated levels associated with parasitic infections.
Stool samples examined under a microscope can identify parasite eggs or larvae. Multiple stool tests over several days improve detection accuracy. Blood tests can also check for antibodies your body makes against specific parasites. Your doctor may order imaging studies if they suspect parasites have migrated to organs beyond your intestines.
Treatment options
- Antiparasitic medications prescribed by your doctor to kill specific parasites
- Proper handwashing with soap for at least 20 seconds before meals and after bathroom use
- Cooking meat to safe internal temperatures, above 145°F for most meats
- Drinking only filtered or boiled water in areas with poor sanitation
- Washing fruits and vegetables thoroughly before eating
- Wearing shoes outdoors to prevent soil-transmitted infections
- Maintaining good hygiene and keeping nails trimmed short
- Treating all household members if one person is infected
- Regular deworming for pets to reduce transmission risk
- Avoiding swimming in freshwater lakes or rivers in endemic areas
Concerned about Parasitic Infections (Eosinophilia)? Get tested at Rite Aid.
- Simple blood draw at your nearest lab
- Results in days, not weeks
- Share results with your doctor
Frequently asked questions
Eosinophilia means you have elevated levels of eosinophils, a type of white blood cell. Your body produces more eosinophils when fighting parasitic infections, especially worm infections. A blood test showing high eosinophil counts often prompts doctors to investigate parasitic causes.
Yes, many people carry parasites without noticeable symptoms for months or years. Mild infections may cause subtle digestive issues you might ignore or attribute to other causes. Blood testing can reveal elevated eosinophils even when you feel fine, allowing early detection and treatment.
Exposure often happens through contaminated food, water, or soil contact. Recent travel to tropical areas, eating raw fish or undercooked meat, or walking barefoot outdoors increases risk. If you have these exposures and unexplained symptoms or elevated eosinophils, testing makes sense.
A complete blood count with differential measures your white blood cell levels and eosinophil percentage. Elevated white blood cells with high eosinophils suggest parasitic infection. Additional blood tests can check for antibodies against specific parasites your body has encountered.
Some parasites spread person to person through poor hygiene or contaminated surfaces. Pinworms commonly spread this way, especially in households and daycare settings. Other parasites require soil, water, or animal hosts and do not spread directly between people through casual contact.
Treatment length depends on the parasite type and infection severity. Many worm infections clear with one to three days of medication. Some parasites require weeks of treatment or multiple medication courses. Your doctor monitors your blood counts to confirm the infection has resolved.
Most parasitic infections treated early cause no lasting harm. Untreated infections can damage your intestines, liver, lungs, or other organs depending on the parasite. Heavy worm burdens can cause malnutrition and growth problems in children. Early detection through blood testing helps prevent serious complications.
Testing makes sense if you have symptoms or known exposures during travel. Many tropical regions have higher rates of parasitic infections in water, food, and soil. Even without symptoms, testing can provide peace of mind and catch infections before they cause problems.
Yes, some parasites spread from pets to people, especially when hygiene is poor. Roundworms and hookworms from dog and cat feces can infect humans. Regular pet deworming, proper waste disposal, and handwashing after handling animals reduce transmission risk significantly.
Raw or undercooked pork, fish, and wild game carry the highest risk. Unwashed vegetables grown in contaminated soil can harbor parasite eggs. Raw water from streams, lakes, or wells in endemic areas often contains parasites. Proper cooking and washing eliminate most risks.