The acid-fast bacillus is
A)most often spread through droplet infection.
B)eradicated by a single dose of penicillin.
C)pathogenic only in humans.
D)most often diagnosed by a urine culture.

Question

Quizplus · Accepted Answer

The acid-fast bacillus is most often spread through droplet infection, which occurs when an infected person coughs or sneezes and another person inhales the droplets containing the bacteria. This is a common way that tuberculosis, a disease caused by the acid-fast bacillus, is spread from person to person.

Answer: B 
 The acid-fast bacillus is not eradicated by a single dose of penicillin. This is because the acid-fast bacillus is resistant to many antibiotics, including penicillin. Treatment for tuberculosis usually involves a combination of antibiotics taken over several months to effectively treat the infection.

Answer: C 
 The acid-fast bacillus is not pathogenic only in humans. While it is true that tuberculosis is primarily a human disease, other species of Mycobacterium, the genus to which the acid-fast bacillus belongs, can cause disease in animals.

Answer: D 
 The acid-fast bacillus is not most often diagnosed by a urine culture. While urine cultures may be used to diagnose some bacterial infections, such as urinary tract infections, they are not typically used to diagnose tuberculosis, which is caused by the acid-fast bacillus. Instead, diagnosis of tuberculosis typically involves a combination of clinical symptoms, imaging tests, and laboratory tests, such as sputum cultures or blood tests.

The Acid-Fast Bacillus Is