Infection of Ascaris usually occurs by:
Correct answer: C. Drinking water containing eggs of Ascaris
- A. Tsetse fly
- B. Mosquito bite
- C. Drinking water containing eggs of Ascaris
- D. Eating imperfectly cooked pork
Explanation
Man acquires infection of Ascaris by directly ingesting Ascaris eggs, containing the infective second-stage larva, with contaminated food or water. The life cycle of Ascaris is monogenetic. There is no vector or intermediate host. Infection with Ascaris, a type of parasitic roundworm, typically occurs through the ingestion of Ascaris eggs.
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About Biodiversity and Variety of Life
Biological classification uses taxonomic ranks, binomial nomenclature and shared characteristics to organize life into kingdoms. The major groups include prokaryotes, protists, fungi, plants and animals, with comparisons based on cell type, cell wall, nutrition, body organization, reproduction and evolutionary relationships; prokaryotes lack a membrane-bound nucleus.
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