Ova in stool are not of diagnostic significance in?
Correct Answer: Strongyloides
Description: Strongyloides REF: Harrison's 18th e chapter 217, Jawetz, Melnick, & Adelberg's Medical Microbiology, 24TH edition chapter 46 Table 46-4 The table clearly says that stool for ova/egg is not required for diagnosis of strongyloides PARASITIC NEMATODE Feature Ascaris lumbricoides (Roundworm) Necator americanus, Ancylostoma duodenale (Hookworm) Strongyloides stercoralis Trichuris trichiura (Whipworm) Enterobius vermicularis (Pinworm) Global prevalence in humans (millions) 807 576 100 604 209 Endemic areas Worldwide Hot, humid regions Hot, humid regions Worldwide Worldwide Infective stage Egg Filariform larva Filariform larva Egg Egg Route of infection Oral Percutaneous Percutaneous or autoinfection Oral Oral Gastrointestinal location of worms Jejunal lumen Jejunal mucosa Small-bowel mucosa Cecum, colonic mucosa Cecum, appendix Adult worm size 15-40 cm 7-12 mm 2 mm 30-50 mm 8-13 mm (female) Pulmonary passage of larvae Yes Yes Yes No No Incubation period (days) 60-75 40-100 17-28 70-90 35-45 Longevity 1 y N. americanus: Decades 5y 2 months 2-5 y A. duodenale: (owing to autoinfection) 6-8 y Fecundity 240,000 N. americanus: 5000-10,000 3000-7000 2000 (eggs/day/worm) 4000-10,000 A. duodenale: 10,000-25,000 Principal symptoms Rarely Iron-deficiency Gastrointestinal Gastrointes? Perianal gastrointes? anemia in heavy symptoms; tinal pruritus tinal or biliary obstruction infection malabsorption or sepsis in hyperinfection symptoms, anemia Diagnostic stage Eggs in stool Eggs in fresh stool, larvae in old stool Larvae in stool or duodenal aspirate; sputum in hyperinfection Eggs in stool Eggs from perianal skin on cellulose acetate tape Treatment Mebendazole Mebendazole Ivermectin Mebendazole Mebendazole Albendazole Pyrantel pamoate Albendazole Albendazole Pyrantel 704 I DNB CET Review Pyrantel pamoate Ivermectin Nitazoxanide Albendazole Ivermectin pamoate Albendazole
Category:
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