Which of the following disease states requires the addition of selective and/or differential medium to ensure recovery of potential pathogens from the respiratory system?

Question

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Pertussis (whooping cough) is caused by Bordetella pertussis, a bacterium that requires selective media for isolation due to its fastidious nature. Cystic fibrosis patients are prone to infections by specific bacteria such as Pseudomonas aeruginosa, which may require differential media for identification among other microbial flora. Laryngitis, however, can be caused by a variety of pathogens not necessarily requiring selective or differential media for recovery.

Which of the Following Disease States Requires the Addition of Selective