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TB facts
TB facts from lecture
Question | Answer |
---|---|
What are the most important symptoms of TB? | Cough w/ or w/out hemoptysis, fever, chills, night sweats, weight loss, poor appetitie |
What are teh common sites of TB? | Lungs, pleura, CNS, lymphatics, GU system, bones and joints , disseminated (miliary TB) |
Is Latent TB contagious? What is treatment? | No it isn't. Prophylaxis with isoniazid for 6-9months reduces risk of progression by 90%. |
What are the disadv of TST? | False +s due to cross rxsn with BCG, 2 patient visits, inter reader variability |
What are the advantages of QFt? | TB specific antigens, 1 patient visit, minimal inter reader variability |
How many people develop TB if infected? | 10% |
What are the conditions that increase the risk of TB progression? | HIV, recently acquired infection, DM, Silicosis, Corticosteriods + other immunosuppressive therapy, Cancer of head and neck, hematologic and reticuloendothelial diseases, end stage renal disease, History of malabspsorption syndromes |
What is the contagiousness of TB? | It is airborne, it depends on environment, duration of exposure, virulence of organism and infectiouness of person with TB |
What are the side effects of isoniazid? | Peripheral neuropathy, hepatitis, liver failure, sleepiness/lethargy |
What are the side effects of Pyrazinamide? | Joint pains, hepatitis, Rash |
What are the side effects of Ethambutol? | Optic neuritis, decreased red/green colour discrimination |
What are the side effects of Rifampin? | GI upset, orange discoloration of body secretions |
How does Rifampin influence metabolism of other drugs? | It upregulates p450 cytochrome,therefore it decreases drug levels |
How do you get MDRTB? | Acquired - noncompliance/inappropriate therapy Primary - Infected with a drug resistant strain |
What are the genotyping techiniques used in NYC? | RFLP and Spoligotyping |