Which animal or vector is known to act as a primary carrier for Toxoplasma gondii? _______________?
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Answer: A. cats
Explanation
Domestic and wild felines act as the essential definitive primary hosts for Toxoplasma gondii. The parasite undergoes sexual reproduction exclusively within the intestinal tract of feline hosts. Infected cats shed millions of resistant oocysts into the environment through their feces. Toxoplasma gondii is a widespread intracellular protozoan parasite capable of infecting warm-blooded animals. The parasite life cycle includes both asexual reproduction in intermediate hosts and sexual reproduction in felines. Environmental contamination with cat feces is a primary route of transmission for humans and livestock.
Pregnant women and immunocompromised individuals must avoid contact with cat litter boxes to prevent toxoplasmosis. Public health guidelines emphasize proper hygiene and food preparation to control parasitic transmission. Understanding the primary reservoir is essential for managing outbreaks of zoonotic parasitic diseases. Dogs serve as accidental intermediate hosts but do not support the sexual cycle of the parasite. Rats act as intermediate hosts that harbor tissue cysts rather than shedding infectious oocysts. Cows can ingest environmental oocysts but are not the primary definitive carriers of the parasite.
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