Which of the five common pathogens found in raw milk is a protozoan?

Prepare for the Milk Borne Pathogens and Pasteurization Test. Study with flashcards, multiple choice questions, hints, and explanations. Ensure your knowledge of milk safety standards!

Multiple Choice

Which of the five common pathogens found in raw milk is a protozoan?

Explanation:
Protozoan pathogens are single-celled eukaryotes, distinct from bacteria. Among the options, Cryptosporidium is the protozoan. The other organisms listed are bacteria—Campylobacter and Salmonella are bacterial pathogens that cause gastroenteritis, and Listeria monocytogenes is a bacterial cause of listeriosis. Cryptosporidium forms hardy oocysts that can contaminate milk and cause cryptosporidiosis when ingested, making it the protozoan among these common raw-milk pathogens.

Protozoan pathogens are single-celled eukaryotes, distinct from bacteria. Among the options, Cryptosporidium is the protozoan. The other organisms listed are bacteria—Campylobacter and Salmonella are bacterial pathogens that cause gastroenteritis, and Listeria monocytogenes is a bacterial cause of listeriosis. Cryptosporidium forms hardy oocysts that can contaminate milk and cause cryptosporidiosis when ingested, making it the protozoan among these common raw-milk pathogens.

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