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Quick question regarding extrapulmonary TB and I hope someone can clear this up for me.
So my current understanding is extrapulmonary TB is often found simultaneously with secondary (reactivation) pulmonary TB, but extrapulmonary TB is itself classified as primary TB.
So after initial infection, the Mycobacteria may disseminate and lie dormant in the organs, bones, and CNS. Later on, they may become reactivated (still classified as primary TB). At the same time, Mycobacteria in the lungs may become reactivated (secondary TB).
Is my understanding of the classification of primary and secondary TB correct or am I wrong somewhere?
One more question: can extrapulmonary TB come from secondary reactivation (or reinfection) TB? My current understanding is that all extrapulmonary TB is from seeded Mycobacteria present in the initial infection/Ghon complex, but I can't think of any good reason why the upper lobe caseous cavitary lesion in secondary TB couldn't seed extrapulmonary infection.
So my current understanding is extrapulmonary TB is often found simultaneously with secondary (reactivation) pulmonary TB, but extrapulmonary TB is itself classified as primary TB.
So after initial infection, the Mycobacteria may disseminate and lie dormant in the organs, bones, and CNS. Later on, they may become reactivated (still classified as primary TB). At the same time, Mycobacteria in the lungs may become reactivated (secondary TB).
Is my understanding of the classification of primary and secondary TB correct or am I wrong somewhere?
One more question: can extrapulmonary TB come from secondary reactivation (or reinfection) TB? My current understanding is that all extrapulmonary TB is from seeded Mycobacteria present in the initial infection/Ghon complex, but I can't think of any good reason why the upper lobe caseous cavitary lesion in secondary TB couldn't seed extrapulmonary infection.