31/05/2025
                                            A MONTH COURSE OF  ANTI TUBERCULOSIS DRUGS,  SENSITIVITY & RESISTANCE 
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Mycobacterium tuberculosis  is an aerobic, + ve  rod shaped,  non motille, non capsulated 2 × 0 2 un  have nucleus, cytoplasm envelope  cell membrane, cell wall composed of  peptidoglycans, arabinoglactan  MYCOLIC ACID lipids ,and micosides , acid fast  bacillus  once stained with hot carbolic fuchsin resist to decolourise  by dilute mineral acid or alcohol due presence of mycolic acid lipids 
     SENSITIVITIES of M .TB  to ATT 
1 Inhibit cell wall synthesis -  vancomycin, cycloserin 
2 Inhibit protein synthesis-  linezolid 
3 Disrupt m RNA codes & affect permeability- strptomycin  ,kananycin 
4 Inhibit DNA gyrase -  Fluoroquinolons 
5 Interfere with DNA & RNA  functions-  Rifampicin ,Rifabutin 
6 Interfere with DNA synthesis  - Idoxuridine 
7 Intertere with intermediary metabolism- para amino salycylic acid ,Ethambutol 
8 Inhibit the synthesis of mycolic acid  - Isoniazid , Pyrazinamide ,Ethambutol
9 Tuberculocidal and pe*****te tubercular cavities  - streptomycin 
10 Tuberculostatic  - Thiocetazone
11 Most potent drugs -  Bedaquilin , Linezolid 
Anti TB drugs can be divided into 
1 1st line  -  HRZES - Isoniazid,  Rifampicin  ,Pyrazinamide,   Ethambutol, streptomycin 
2 2nd line - cycloserine, kanamycin ,Amikacin  , capreomycin ,Fluroquinolones, Delamanid ,Azithro ,clarithro, pa, tan, Etm 
    Thus  suggestive synergistic  wise use of ATT may   kills Mycobacterium within a month for cat 1 ie.Att 2nd line for 14 days followed by 1st line for 14 days (  complete successful 1 months treatment  ) when approved by WHO  ie. Killing of M . Tuberculosis's DNA ,PROTEINS  ,RNA ,METABOLISM, CELL WALL above described 
RESISTANCE  --- 
   Unwise use of ATT soon develop resistance  by 1  Mutational changes  M Bacterial  genome 2 Transmission of resistance  steaints 3  with Inadequate treatment  ,4 Non compliance 4 poor quality drugs 5 poor