Despite some successes associated with using BCG vaccines and some TB treatment therapies,
the overall global incidence of TB is rising as a result of the emergence of drug-resistant TB strains and
the deadly combination of HIV (human immune deficiency virus) and TB epidemics(Porco et.al.,2001).
In more than half of all HIV – related deaths, tuberculosis is the “opportunistic infection” which takes
advantage of an immune system already compromised by HIV ( Colijn et.al.,2006). Most of the current
resurgence of the disease is in Africa, parts of Europe and Asia (WHO,2009)