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World TB Day
TB factoids
| Question | Answer |
|---|---|
| lower respiratory tract is normally sterile if | directly sampled |
| Acceptable sputum spec: <__ squamous epithelial cells/low power field | 10 |
| Macrophages: Activated phagocytic cells common in ____ | fungal, acid-fast & some atypical bacterial infections |
| Eosinophils: Indicative of ____ | allergic reaction or parasitic infection |
| Most common cause of bacterial pneumonia (70%) | Streptococcus pneumoniae |
| Lancet shaped gram positive cocci in pairs | Streptococcus pneumoniae |
| Culture never indicated in | chronic bronchitis |
| if you suspect atypical bacteria you should | notify the lab in advance |
| where do you grow leprosy | armidillo foot pads |
| TB infection spread person to person via ____ | respiratory droplets in air (cough) |
| Positive PPD Zone Size >= __ mm if no risk factors | 15 |
| Positive PPD Zone Size >= __ mm if co-morbid risk factors;Diabetes, chronic renal failure, cancer, IVDA, congregate setting, foreign born/immigrant <5yrs from endemic area (Asia, Africa, Latin America), Mycobacteriology lab tech, gastrectomy | 10 |
| Positive PPD Zone Size >= __ mm if HIV+, contact of TB+ person, organ transplant/immunosuppression, fibrotic CXR, on 15 mg prednison/day, or TNF alpha inhibitor | 5 |
| substance used for control in PPD test | candida albicans antigen |
| the inability to react to skin tests because of a weakened immune system | anergy |
| more specific test for LTBI & can help exclude BCG or Mycobacterium not TB reactions. | Interferon Gamma Release Assay |
| vaccine against tuberculosis | Bacille Calmette-Guérin (BCG) |