Antimicrobials 5 - Smith - From Cutler Flashcards
What type of bacterium have nearly impermeable cell walls?
-Mycobacterium
What shields and prevents many drugs from accessing the cell membrane of mycobacterium?
-Mycolic acids
What are three way that mycobacterial defenses make it exceptionally difficult for antimicrobials to do their jobs?
-Thick hydrophobic cell wall-Efflux pumps-Some species can hide inside patients cells
What area of the body does Mycobacterium tuberculosis primarily effect?
-Lung, but can cause disease in almost any tissue
What conditions do Mycobacterium leprae grow better in?
-Cooler body temps closer to skin surface
What are other names for a TB test?
-TST -PPD
If a person has a TST greater than 5 mm who is that indicative of a positive TB test in?
-HIV patients-Close contacts of active cases-Have fibrotic chest x-ray films
What is the prophylactic treatment of choice for some who has latent/asymptomatic infections of primary tuberculosis?
-Isoniazid for 9 months
What is the treatment of choice for over/active infection of primary tuberculosis?
-(RIPE) Rifampin + Isoniazid + Pyrazinamide+ Ethambutol
When you are treating the overt/active infection of Primary TB after you do a 2 month treatment with what do you do?
-Do a 4 month treatment of Rifampin + Isoniazid
If there is an intracellulare organism in the overt/active infection of primary TB how do you treat?
-RIPE for 12 months + azithromycin
How long is the longest you should use the Pyrazinamide in a TB treatment?
-2 months because of hepatotoxicicity
Healthy patients infected with TB have a ____ % risk of reactivation in the first ____ years and then a ____ % lifetime risk of reactivation?
-5-2-5
What is the treatment of choice for secondary TB?
-(RIPES)-Rifampin + isoniazid + pyrazinamide +Ethambutol + streptomycin (2 months)-4 months treatment with isoniazid and rifampin
What is an aminoglycoside drug that can be used in TB?
-Streptomycin
What is a macrolide drug that can be used in TB?
-Azithromycin
What is a nucleic acid synthesis inhibitor drug that can be used in TB?
-Rifampin