Hello and welcome to HCM,
Paucibacillary and multibacillary tuberculosis are two types of tuberculosis based on the bacterial load.
Paucibacillary implies low bacterial load and multibacillary implies very high bacterial load.
Te causative agent for tuberculosis is bacteria called
mycobacterium tuberculosis.
Infection with the bacteria is very common but not all develop the disease.
According to your history you have developed tuberculosis in past and you have also taken treatment for it.
Medication (anti-tubercular therapy) clears away the infection, but the healing process is characterised by fibrotic bands in the lung parenchyma.
These fibrotic bands fade with time but do not disappear permanently.
Tuberculosis is characterised by fibrotic bands in the lung parenchyma.
Thus, these fibrotic bands can be due to previous tuberculosis.
As you have mentioned that you have developed
paucibacillary tuberculosis again.
You need to take treatment for the fresh infection.
Before that you need to get sputum examination for isolation of mycobacterium.
Fibrotic bands will fade with treatment.
Thanks and take care
Dr Shailja P Wahal