Which of the following can be used for specific prophylaxis of pertussis?

Correct Answer: A

Rationale: The correct answer is A: Pertussis toxoid. This is because pertussis toxoid is a component of the pertussis vaccine, which provides specific prophylaxis against pertussis by stimulating the immune system to produce antibodies against the bacteria causing the disease. Choice B, killed vaccine, is incorrect as it does not specify pertussis toxoid. Choice C, wide-spectrum antibiotics, is incorrect as antibiotics are used for treatment, not prophylaxis. Choice D, None of the above, is incorrect as pertussis toxoid is specifically used for prophylaxis of pertussis.

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: B

Rationale: The correct answer is B: microaerophiles. These bacteria require oxygen to grow, but only at low concentrations as higher levels can be toxic. They possess enzymes to deal with reactive oxygen species. Obligate aerobes (A) require oxygen for growth, obligate anaerobes (C) cannot survive in the presence of oxygen, and aerotolerant anaerobes (D) can tolerate oxygen but do not use it for growth.

Correct Answer: C

Rationale: Rationale: Schizogony is the process in protozoans where multiple nuclear divisions occur before cell division. This results in the formation of multiple daughter cells. - A: Budding is a form of asexual reproduction where a new organism grows from an outgrowth on the parent. - B: Mitosis is a type of cell division that results in two identical daughter cells. - D: Fragmentation is a form of asexual reproduction where an organism breaks into fragments, each developing into a new organism.

Correct Answer: D

Rationale: The correct answer is D: nonproprietary. The generic name of a drug is the official, nonproprietary name given to a drug by an organization such as the U.S. Food and Drug Administration (FDA). This name is not owned by any specific company and is used universally to identify the drug's active ingredient. The generic name helps to communicate the specific medication being prescribed and allows for cost-effective options for consumers. A: Trade name refers to the brand name given to a drug by a pharmaceutical company. B: Proprietary name is another term for the trade name, specific to the company that produces the drug. C: Chemical name refers to the exact chemical composition of the drug, which may not be user-friendly or easily recognized by healthcare professionals or consumers.