Public Health Emergency Response and Intervention (PERI)
Communicable Disease Problem Identification: Tuberculosis (TB)
Overview of Tuberculosis (TB)
Tuberculosis (TB) is a highly contagious infectious disease caused by the bacterium
Mycobacterium tuberculosis. Though TB primarily affects the lungs, causing pulmonary TB, it
can also target other organs, including the kidneys, brain, and spine, leading to extra pulmonary
TB. TB remains a global health threat, ranked among the top ten causes of death worldwide.
According to the World Health Organization (WHO), in 2021, approximately 10.6 million
people were diagnosed with TB, and the disease claimed 1.6 million lives, making it the leading
cause of death from a single infectious agent, surpassing HIV/AIDS (World Health Organization
[WHO], 2022). This paper seeks to examine the epidemiology of TB, its global burden, modes of
transmission, risk factors, and challenges in managing the disease, particularly in high-risk
populations. We will also explore strategies for TB control and the role of public health agencies,
governments, and the private sector in addressing this complex health challenge.
Forms of Tuberculosis
TB manifests in two primary forms: active TB and latent TB. Active TB refers to an active
infection where individuals show clear symptoms such as persistent cough, fever, night sweats,
and weight loss. This form is contagious, and transmission can occur when infected individuals
cough or sneeze, expelling droplets containing the bacteria into the air. Latent TB, on the other
hand, occurs when an individual is infected with Mycobacterium tuberculosis but does not
exhibit symptoms. Latent TB is not contagious, but without treatment, it can progress into active
TB, particularly when the individual's immune system is compromised. As such, the progression
from latent to active TB is a critical public health concern, especially for individuals with
weakened immune systems, such as those living with HIV/AIDS (Centers for Disease Control
and Prevention [CDC], 2022).
Global Burden of TB
Despite advancements in healthcare and the availability of treatment options, TB remains one of
the most deadly infectious diseases worldwide. In 2021, approximately 10.6 million new TB
cases were reported globally, with the highest burden in low- and middle-income countries,
particularly in regions such as sub-Saharan Africa, Southeast Asia, and parts of Eastern Europe
(WHO, 2022). The disease disproportionately affects vulnerable populations, including those
living with HIV/AIDS, prisoners, refugees, and individuals living in overcrowded and poor
living conditions. In sub-Saharan Africa, TB remains the leading cause of death among people
living with HIV, and the emergence of multidrug-resistant TB (MDR-TB) further complicates
efforts to reduce TB-related morbidity and mortality.
In addition to its global impact, TB contributes significantly to economic inequality. Many low-
income communities lack access to adequate healthcare, nutritious food, and education, creating
a vicious cycle of poverty and poor health outcomes. For marginalized groups, such as
indigenous populations and migrants, the incidence of TB is particularly high due to social and
Communicable Disease Problem Identification: Tuberculosis (TB)
Overview of Tuberculosis (TB)
Tuberculosis (TB) is a highly contagious infectious disease caused by the bacterium
Mycobacterium tuberculosis. Though TB primarily affects the lungs, causing pulmonary TB, it
can also target other organs, including the kidneys, brain, and spine, leading to extra pulmonary
TB. TB remains a global health threat, ranked among the top ten causes of death worldwide.
According to the World Health Organization (WHO), in 2021, approximately 10.6 million
people were diagnosed with TB, and the disease claimed 1.6 million lives, making it the leading
cause of death from a single infectious agent, surpassing HIV/AIDS (World Health Organization
[WHO], 2022). This paper seeks to examine the epidemiology of TB, its global burden, modes of
transmission, risk factors, and challenges in managing the disease, particularly in high-risk
populations. We will also explore strategies for TB control and the role of public health agencies,
governments, and the private sector in addressing this complex health challenge.
Forms of Tuberculosis
TB manifests in two primary forms: active TB and latent TB. Active TB refers to an active
infection where individuals show clear symptoms such as persistent cough, fever, night sweats,
and weight loss. This form is contagious, and transmission can occur when infected individuals
cough or sneeze, expelling droplets containing the bacteria into the air. Latent TB, on the other
hand, occurs when an individual is infected with Mycobacterium tuberculosis but does not
exhibit symptoms. Latent TB is not contagious, but without treatment, it can progress into active
TB, particularly when the individual's immune system is compromised. As such, the progression
from latent to active TB is a critical public health concern, especially for individuals with
weakened immune systems, such as those living with HIV/AIDS (Centers for Disease Control
and Prevention [CDC], 2022).
Global Burden of TB
Despite advancements in healthcare and the availability of treatment options, TB remains one of
the most deadly infectious diseases worldwide. In 2021, approximately 10.6 million new TB
cases were reported globally, with the highest burden in low- and middle-income countries,
particularly in regions such as sub-Saharan Africa, Southeast Asia, and parts of Eastern Europe
(WHO, 2022). The disease disproportionately affects vulnerable populations, including those
living with HIV/AIDS, prisoners, refugees, and individuals living in overcrowded and poor
living conditions. In sub-Saharan Africa, TB remains the leading cause of death among people
living with HIV, and the emergence of multidrug-resistant TB (MDR-TB) further complicates
efforts to reduce TB-related morbidity and mortality.
In addition to its global impact, TB contributes significantly to economic inequality. Many low-
income communities lack access to adequate healthcare, nutritious food, and education, creating
a vicious cycle of poverty and poor health outcomes. For marginalized groups, such as
indigenous populations and migrants, the incidence of TB is particularly high due to social and
