True about miliary tuberculosis
Military TB is due to hematogenous spread of tubercle bacilli.Although in children,it is often the consequence of primary infection,in adults,it may be due to either recent infection or reactivation of old disseminated foci.The lesions are usually yellowish granulomas 1--2 mm in diameter that resemble millet seeds Reference: Davidson edition23rd pg 589
Occurs following primary reactivation
Occurs following secondary reactivation
Both primary and secondary reactivation
All
Respiratory system