How long do TB bacteria persist in the air?

TB bacteria are capable of spreading from person to person through the respiratory tract and contact, so understanding the life characteristics and existence of TB germs such as TB germs how long in the air, dying at what temperature will help people prevent the infection of tuberculosis in the best way.

1. The basic characteristics of TB bacteria

TB bacteria are bacterium about 0.4 x 3-5 mm in size, shellless, hairless and without dentistry. Tuberculosis bacterium stands in small groups of N, V, Y or standing individually, TB bacteria are not stained by the usual method but catch red on the Ziehl-Neelsen dyeing copy.

Tb-causing bacteria are gas-loving bacteria that cannot be kept in a normal environment but need a nutritious environment, growing slowly with a division time of about 18 hours / 1 division.

Bacteria that cause pulmonary tuberculosis, pericardial tuberculosis, tuberculosis … high resistance in dry conditions and other physical factors, called alcohol-resistant, acid-resistant bacteria, chemicals used to kill TB bacteria need to have high concentrations and long exposure times to work.

Tuberculosis bacteria

Bacteria that cause tuberculosis belong to the gas-loving type of bacteria

2. How long do TB bacteria persist in the air?

How long TB bacteria live in the air will depend on the main factors: temperature, humidity and darkness. Features of existence of TB bacteria are as follows:

  • TB bacteria can last a long time in the air environment for about 3-4 months
  • In humid and dark environments, TB bacteria even last for up to 3 months and remain vis vis million
  • TB bacteria are aerobic bacterium, so in clinical cases, TB bacteria are most common in the largest number of tuberculosis burrows with catheterized bronchi, which is rich in oxygen.

Drug-resistant tuberculosis

TB bacteria can last a long time in the air environment for about 3-4 months

3. At what temperature does TB bacteria die?

At what temperature does TB bacteria die? is a question that many people are interested in. Under different temperature conditions as well as physical agents, TB bacteria will survive different periods of time:

  • Under sunlight: TB bacteria will usually die after about 1.5 hours
  • At 42°C: TB bacteria stop growing
  • At 80°C or higher: TB bacteria die after 10 minutes
  • Under ultraviolet exposure: TB bacteria last only for about 2-3 minutes
  • In 90° alcohol: TB bacteria will be destroyed in 3 minutes
  • In phenic acid 5%: TB bacteria last only for about 1 minute

Share99 International Health Hub currently provides BCG vaccination services for tuberculosis prevention of Vaccines and Medical Bio-products, manufactured in Vietnam.

The advantages of vaccination at Share99 International Health Hub include:

  • Vaccines are imported and stored in modern cold storage systems, with COLD chains meeting GSP standards, keeping the vaccine in the best condition to ensure quality.
  • Clients will be examined by specialists, fully screened for health and physical issues, advice on vaccines and vaccination regimens, how to monitor and care after vaccination before prescribing vaccinations according to the latest recommendations of the Ministry of Health / World Health Organization to ensure the best and safest effect for children.
  • Being monitored before, during and after vaccination at Share99 Health System and always have emergency ekip ready to coordinate with the vaccination department to handle cases of anaphylalactic shock, respiratory failure – stop cyclic, ensure timely treatment, the right regimen when incidents occur.
  • The vaccination room is airy, has a play area, helps customers feel comfortable like walking around and have a good mentality before and after vaccination.
  • A team of experienced, professional pediatric doctors and nurses, understand the child's psychology and apply effective pain relief to the child during vaccination.
  • 100% of vaccination customers are monitored 30 minutes after vaccination and re-evaluated before leaving.
  • For child customers, parents will receive a reminder message before the date of vaccination and the child's vaccination information will be synchronized with the national immunization information system.

To receive direct advice or make an appointment for your child's vaccination (including a reminder schedule), please make an appointment HERE or contact the nearest Hotline of Share99 International Clinic/ Health Hub.


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About: Minh Quynh

b1ffdb54307529964874ff53a5c5de33?s=90&d=identicon&r=gI am the author of I had been working in Vinmec International General Hospital for over 10 years. I dedicate my passion on every post in this site.


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