Mycoplasma pulmonis disease risk increases under high levels of which atmospheric component?

Mycoplasma pulmonis disease risk increases under high levels of which atmospheric component?

• A. Oxygen
• B. Ammonia
• C. Carbon dioxide
• D. Humidity

Answer: (B)

The main idea is how air quality in animal housing affects respiratory disease risk in laboratory rodents. Ammonia buildup from urine and waste in poorly ventilated cages irritates the nasal passages and lower airway, triggering inflammation and impairing the mucociliary defenses that normally clear pathogens. When these defenses are compromised, infections such as those caused by Mycoplasma pulmonis can establish more easily, so high ammonia levels meaningfully raise disease risk. In practice, good ventilation and prompt cleaning to keep ammonia low help maintain respiratory health and reduce the likelihood of mycoplasma-related issues. Oxygen levels, carbon dioxide buildup, and humidity can influence comfort and general health, but ammonia specifically targets the respiratory defense mechanisms that are central to susceptibility to this organism.

The main idea is how air quality in animal housing affects respiratory disease risk in laboratory rodents. Ammonia buildup from urine and waste in poorly ventilated cages irritates the nasal passages and lower airway, triggering inflammation and impairing the mucociliary defenses that normally clear pathogens. When these defenses are compromised, infections such as those caused by Mycoplasma pulmonis can establish more easily, so high ammonia levels meaningfully raise disease risk.

In practice, good ventilation and prompt cleaning to keep ammonia low help maintain respiratory health and reduce the likelihood of mycoplasma-related issues. Oxygen levels, carbon dioxide buildup, and humidity can influence comfort and general health, but ammonia specifically targets the respiratory defense mechanisms that are central to susceptibility to this organism.