5 Misbelief People Have About Tuberculosis
TB is a bacterial infection. It primarily affects the lungs, but it can also impact other parts of the body. Symptoms include a chronic cough with bloody mucus, fever, and night sweats. Another common symptom is weight loss. TB has affected humans for thousands of years, and it is still one of the world’s deadliest communicable diseases.
The bacteria that cause TB, called Mycobacterium tuberculosis, spread from one individual to another through droplets expelled during coughing or sneezing. After transmission, the disease can progress in different ways, depending on the response of the host immune system.
The WHO estimate that the global incidence of TB dropped by around 2% each year from 2015 to 2019. However, with a worrying rise in multidrug resistant TB, there is still a long way to go before scientists can eradicate this curable and preventable disease.
Below are some of the misbelief that is associated with Tuberculosis:
1. Everyone with TB is infectious
This is untrue. Someone with TB can only transmit the infection if they develop symptoms. This means that someone with a latent infection cannot transmit TB. Also, a person can only transmit TB when the bacteria are in the lungs or throat. If the bacteria are in other parts of the body, such as the kidney or spine, a person is unlikely to transmit the disease.
Generally, people with TB stop being infectious around 2–3 weeks after starting treatment.
2. TB is genetic
Although people used to believe that TB passed from parent to child, this is a myth. This misconception may have arisen because people living in the same household often developed the disease. We now know that this is because their close proximity made it easier for the bacteria to spread from person to person.
However, there does appear to be a genetic component to TB. However, rather than a gene being responsible for causing TB, it appears that some genes might influence whether or not someone will transition from a latent infection to an active infection.
3. There is no cure for TB
This is false; TB is treatable. The most common treatment for a latent TB infection is the antibiotic isoniazid. People with TB should take this drug as a single daily pill for 6–9 months.
For individuals with an active infection, doctors tend to prescribe a combination of antibacterial medications for 6–12 months. A common combination is isoniazid with rifampin, pyrazinamide, and ethambutol.
4. TB only affects people in low-income countries
TB can affect people anywhere in the world. However, there are certain regions wherein TB is more prevalent. According to the WHO, in 2019, 44% of new TB cases occurred in South East Asia. Eight countries account for two-thirds of new cases: India, Indonesia, China, the Philippines, Pakistan, Nigeria, Bangladesh, and South Africa.
5. TB spreads through shaking hands
TB is a serious illness, so people are understandably concerned about how it can spread. This has given rise to some myths.
TB cannot spread through:
- shaking hands
- sharing foods or beverages
- touching bed linen or toilet seats
- sharing toothbrushes
TB can only spread when someone with an active infection in their lungs or throat coughs, sneezes, speaks, or sings.