Exam 26: Mycobacterium Tuberculosis and Other Nontuberculosis Mycobacteria

A person travels to Mexico for a weeklong vacation.A couple weeks after returning come home,the person develops a cough,fatigue,weight loss,low-grade fever,and night sweats.What disease should the physician suspect?

What are scotochromogens?

What constituent of Lowenstein-Jensen (LJ)medium is added to suppress the growth of gram positives?

All of the following are traditional characteristics used to identify mycobacteria EXCEPT:

This disease is slowly progressive,malignant,and,if untreated,life threatening.It is characterized by skin lesions and progressive,symmetric nerve damage.Lesions of the mucous membranes of the nose may lead to destruction of the cartilaginous septum,resulting in nasal and facial deformities.What disease is this?

All of the following are biochemical tests for the identification of Mycobacterium spp.EXCEPT:

What is the single most important piece of equipment in a mycobacterial laboratory?

What is the recommended contact time for most disinfectants in a mycobacteriology laboratory?

All of these stains are used to visualize mycobacteria on a smear EXCEPT:

What is the most sensitive and rapid primary isolation liquid media for Mycobacterium spp.?

What are nonchromogens?

How has the treatment of mycobacterial disease changed in light of the multidrug-resistant strains of mycobacteria that are being isolated?

How are mycobacterial infections transmitted?

All of the following are common extrapulmonary infection sites for tuberculosis EXCEPT:

All of the following are biochemical tests for the identification of Mycobacterium spp.EXCEPT:

What are photochromogens?

When designing a mycobacterial laboratory,the designers should build in all the following engineering controls to keep the workers safe EXCEPT:

What is the definition of a multidrug-resistant Mycobacterium tuberculosis?

A microbiologist is checking the mycobacteria cultures.She notices one tube of Lowenstein-Jensen (LJ)that is a buff color,rough,and seems arranged in a cord.It has taken these organisms 4 weeks to grow.What is the most probable organism?

What is the antigen used in the purified protein derivative (PPD)skin test?