10-5 Tuberculosis (Cambridge AS A Level Biology, 9700)
Автор: OtterBioTutor
Загружено: 2023-12-16
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0.00 Causative pathogens for TB
Mycobacterium tuberculosis or Mycobacterium bovis
1:00 How does TB spread?
For M.tuberculosis : release of airborne droplets containing the pathogen and inhaled by another person
For M.bovis: infected cattle/cow contain pathogens and we ingest milk or meat containing these pathogens
2:43 Symptoms of TB, when does latent TB become a problem?
6:50 Treatment of TB
Different types of antibiotics given simultaneously over a 6-9 month period
DOTS
11:25 How to prevent spread of TB
quarantine
contact tracing
vaccine
for M.bovis: destroy infected cattle and pasteurize milk
improve nutrition
improve housing condition
people with HIV should be started on ARTs to prevent weakening of immune system
17:37 why is it difficult to eradicate TB?
TB easily spreads (airborne)
many malnourished populations
rise in HIV cases
mass migration of people
Mycobacterium evolve to become antibiotic resistant
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