Most pathogens grow best at body temperature and are classified as:
Mesophiles
Psychrophiles
Thermophiles
None of the above are true
The Correct Answer is A
A. Mesophiles: Mesophiles are microorganisms that grow optimally at moderate temperatures, typically between 20°C and 45°C, which includes normal human body temperature (~37°C). Most human pathogens fall into this category because their optimal growth conditions align with the host environment, allowing them to colonize and cause disease effectively.
B. Psychrophiles: Psychrophiles are organisms that thrive at very low temperatures, typically below 15°C, and are commonly found in cold environments such as deep oceans, polar regions, or refrigerated food. They are generally not pathogenic to humans because their growth is limited at body temperature.
C. Thermophiles: Thermophiles grow best at high temperatures, usually above 45°C, and are commonly found in hot springs, compost, or other naturally heated environments. These bacteria are adapted to extreme heat and are rarely human pathogens because they cannot survive at normal body temperature.
D. None of the above are true: This statement is incorrect because mesophiles include the majority of human pathogens that grow optimally at body temperature.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Obligate aerobe: An obligate aerobe requires oxygen for growth because it relies on aerobic respiration to produce ATP. Without oxygen, these bacteria cannot generate sufficient energy and will fail to survive. Examples include Mycobacterium tuberculosis and Pseudomonas aeruginosa.
B. Obligate anaerobe: An obligate anaerobe cannot tolerate oxygen and may be killed or inhibited by its presence. These bacteria rely on fermentation or anaerobic respiration for energy and are typically found in oxygen-free environments such as deep tissues or the gastrointestinal tract.
C. Aerotolerant organism: Aerotolerant organisms do not require oxygen for growth but can survive in its presence. They rely on fermentation exclusively and are indifferent to oxygen, unlike obligate aerobes which must have it for survival.
Correct Answer is A
Explanation
When a virus enters a host cell, it hijacks the host's cellular machinery to replicate itself. Viral genes direct the host cell to transcribe and translate viral proteins instead of its own normal proteins. This redirection alters the host’s metabolic and genetic activities, often shutting down regular cellular processes. The host cell becomes a “viral factory,” producing viral components that are then assembled into new virions. This process can damage or kill the host cell, depending on the type of virus and replication strategy, and is a defining characteristic of viral infections, distinguishing them from non-infectious intracellular activities.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.