Parasitic Nematodes and Their Impact on Global Health

Rectal prolapse is caused by Trichuris trichiura due to its presence in the colon. Eosinophilia is absent as the parasite does not migrate out of the colon. Trichuriasis is the second most common parasite globally behind Ascariasis.

The correct answer is Hookworm (Nacator sp.) because the larvae live in the soil, penetrate the skin, migrate through the lung, and live in the small intestine where they suck blood and cause iron deficiency. The pregnant woman and her cousin are showing deficits due to low iron stores from blood loss caused by the hookworms.

Strongyloides stercoralis can cause hyperinfection in immunocompromised patients, leading to the symptoms described. ID can be performed through agar plate migration and serology.

The correct answer is Enterobius Vermicularis which matches the symptoms and presentation described in the question. Giardia Lamblia, Ascaris Lumbricoides, and Taenia Solium do not typically cause the specific symptoms mentioned or match the presentation described.

Trichinella spiralis is commonly acquired by consuming undercooked meat, particularly pork. It presents with symptoms like fever and muscle pain. To diagnose it, very high eosinophilia, muscle biopsy, and serology tests can be conducted. Giardia lamblia, Toxoplasma gondii, and Taenia solium are pathogens that present with different symptoms and require different diagnostic tests, which are not applicable to the presented case.

Onchocerciasis, also known as river blindness, is caused by the parasite Onchocerca volvulus transmitted through the bite of black flies. The disease presents with skin nodules, dermatitis, depigmentation, and lymphadenopathy. Diagnosis is based on skin snips, as microfilariae are not found in the blood but in the lymphatics.

The correct parasite in this scenario is Dracunculus (Guinea worm) due to the patient's exposure to contaminated water sources. The other incorrect options are different parasites transmitted through various vectors and have distinct treatments.

Wuchereria bancrofti is the parasite responsible for lymphadenopathy, hydrocele (lymphedema of scrotum), tropical pulmonary eosinophilia, and fever with adenolymphangitis. It is transmitted by mosquitoes and can be diagnosed by identifying microfilaria in a night blood sample and observing 'filarial dancing' on ultrasound of the lymphatics.

Toxocara infection is caused by dog or cat roundworm and can lead to various symptoms including vision disturbances, seizures, and hepatitis. It is important to seek medical attention for proper diagnosis and treatment.

Anisakiasis is a parasitic infection caused by Anisakis larvae, often found in raw or undercooked fish. The larvae die in the stomach of the human host. Gastroscopy removal is the recommended method to remove the parasite.