Ascaris Lumbricoides Causing Ascariasis Morphology Disease Symptoms Diagnosis Treatment
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Ascaris lumbricoides, also known as the roundworm, is a parasitic nematode that infects humans. • • Morphology: • • 1. Length: 15-40 cm • 2. Width: 3-6 mm • 3. Long, cylindrical body • • Lifecycle: • • 1. Eggs ingested through contaminated food/water • 2. Eggs hatch in small intestine • 3. Larvae penetrate intestinal wall, migrate to lungs • 4. Larvae break through alveoli, ascend airways • 5. Larvae swallowed, mature in small intestine • 6. Adult worms mate, produce eggs • • Transmission: • • 1. Contaminated food/water • 2. Fecal-oral transmission • 3. Poor sanitation/hygiene • • Symptoms: • • 1. Intestinal obstruction • 2. Abdominal pain • 3. Diarrhea • 4. Weight loss • 5. Respiratory symptoms (cough, wheezing) • 6. Intestinal perforation • • Diagnosis: • • 1. Stool examination (eggs) • 2. Imaging studies (X-rays, CT, MRI) • 3. Endoscopy with biopsy • 4. Serological tests (ELISA, Western blot) • • Treatment: • • 1. Albendazole (400-800 mg, 1-3 days) • 2. Mebendazole (500-1000 mg, 1-3 days) • 3. Pyrantel pamoate (10-20 mg/kg, single dose) • • Prevention: • • 1. Proper sanitation/hygiene • 2. Clean water supply • 3. Cooking food thoroughly • 4. Avoiding contaminated soil • • Complications: • • 1. Intestinal obstruction • 2. Respiratory failure • 3. Malabsorption • 4. Secondary infections • #AscarisLumbricoides
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