Pulmonary tuberculosis treatment outcome in a rural setting in Northern Ghana

Abstract

Tuberculosis ranks among the top ten causes of global mortality. Globally it kills nearly 2 million people each year and is the second leading cause of death after Human Immune Deficiency Virus/Acquired Immune Deficiency Syndrome (HIV/AIDS).Tuberculosis (TB) is primarily an illness of the respiratory system, and is spread by coughing and sneezing from an infectious person. Nearly a third of the world’s population is infected with the bacilli that causes TB and are at risk of developing tuberculosis (TB).1, 2 Left untreated, each person with active TB disease will infect on average between 10 and 15 people every year. In 2004, estimated per capita TB incidence was stable or falling in five out of six World Health Organization (WHO regions, but growing at 0.6% per year globally. The exception is the African region, where TB incidence was still rising.3, 4 HIV increases the risk of developing TB and accounts for much of the increase in countries where prevalence is high. 4 Co-infection is common and could be as high as 70% in high-burdened countries. Gains made in global TB control in the 1970 and 80s are being dramatically reversed by the effect of HIV/AIDS. HIV is the main reason for failure to meet Tuberculosis (TB) control targets in high HIV settings.3 Drug-resistant TB is a major problem. Resistance to single anti-tuberculosis drugs have been reported in almost every country surveyed. To make the situation worse, drugs resistant to all the major anti-TB drugs have emerged. 4 Drug-resistant TB is caused by inconsistent or partial treatment, when patients do not take all their medicines regularly for the required period because they start to feel better, because doctors and health workers prescribe the wrong treatment regimens, or because the drug supply is unreliable. A particularly dangerous form of drug-resistant TB is multidrug-resistant TB (MDR-TB), which is defined as the disease caused by TB bacilli resistant to at least isoniazid and rifampicin, the two most powerful anti-TB drugs.4, 5