What is the pathogenesis of tuberculosis?
What is the pathogenesis of tuberculosis?
What is the pathogenesis of tuberculosis?
Transmission of TB is by inhalation of infectious droplet nuclei containing viable bacilli (aerosol spread). Mycobacteria-laden droplet nuclei are formed when a patient with active pulmonary TB coughs and can remain suspended in the air for several hours. Sneezing or singing may also expel bacilli.
What causes secondary TB?
Secondary tuberculosis is usually due to the reactivation of old lesions or gradual progression of primary tuberculosis into chronic form. However, recent evidence suggests that reinfection is responsible for some of the secondary tuberculosis.
How does intestinal tuberculosis spread?
The modes of infection of abdominal TB include swallowing infected sputum, ingestion of bacilli from infected milk products or meat, hematogenous spread from a lung focus, spread via lymphatics from infected lymph nodes, and contiguous spread from adjacent organs [12].
What is primary and secondary tuberculosis?
Primary and secondary TB are also thought to have characteristic radiographic and clinical features: primary TB is said to be characterized by lower-lobe disease, adenopathy, and pleural effusions, and termed atypical, whereas secondary, or reactivation, TB is associated with upper lobe disease and cavitation, termed …
Is secondary tuberculosis treatable?
Outlook for pulmonary TB Pulmonary TB is curable with treatment, but if left untreated or not fully treated, the disease often causes life-threatening concerns. Untreated pulmonary TB disease can lead to long-term damage to these parts of the body: lungs. brain.
What is the difference between primary tuberculosis and secondary tuberculosis?
What is the difference between primary and secondary infections?
While a primary infection can practically be viewed as the root cause of an individual’s current health problem, a secondary infection is a sequela or complication of that root cause. For example, an infection due to a burn or penetrating trauma (the root cause) is a secondary infection.