2. INTRODUCTION
🞇 Tuberculosis (TB) - Infectious bacterial
disease caused by Mycobacterium
tuberculosis - most commonly affects the
lungs.
🞇 Transmitted from person to person via
droplets from the throat & lungs of people
with the active respiratory disease.
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3. BURDEN
GLOBALLY:
🞇 In 2013, mortality of TB including HIV was 16 per lakh
cases
🞇 Mortality of TB excluding HIV was 5 per lakh cases
🞇 Prevalence of TB was 159 per lakh
🞇 Incidence of TB was 80 per lakh
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4. INDIA
🞇 India is the highest TB burden country in the world & accounts
for nearly 1/5th (20 per cent) of global burden of tuberculosis,
2/3rd of cases in SEAR.
🞇 Every year approximately 1.8 million persons develop
tuberculosis, of which about 0.8 million are new smear
positive highly'- infectious cases.
🞇 Annual risk of becoming infected with TB is 1.5 % and once
infected there is 10 % life-time risk of developing TB
disease
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7. AGENT FA1 4
CTORS 9/12/2015
Agent
Mycobacterium tuberculosis
- facultative intracellular parasite, ingested by phagocytes
& resistant to intracellular killing
Source of infection
Human - human case positive for tubercle bacilli& who has
either received no treatment or has not been fully treated
Bovine - infected milk
Communicability
Patients are infective as long as they remain untreated
8.
9. HOST FACTO
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RS
1. AGE: Affects all ages. In India,
0-14 age group – 2%,
15-24 age group - 20%
2. SEX: More prevalent in males
3. HEREDITY: Tuberculosis is not a hereditary disease, but
through studies found that inherited susceptibility is an
important risk factor.
4. NUTRITION: Malnutrition – predisposes to TB
5. Immunity: Man has no inherited immunity againstTB
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10. SOCIAL FACTORS
🞇 TB is a social disease with medical aspects, also
known as barometer of social welfare
🞇 Social factors include poor quality of life, poor
housing, overcrowding, population explosion,
undernutrition, lack of education, large families, &
lack of awareness of causes of illness
🞇 All these factors are interrelated & contribute to the
occurrence & spread of TB
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11. MODE OF TRANSMIS1
S
7
ION
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🞇 Transmitted mainly by droplet
infection and droplet nuclei – by
sputum-positive patients with
pulmonary TB
🞇 Coughing generates the largest
number of droplets of all sizes
🞇 Frequency & vigour of cough &
the ventilation of the enviroment
influence transmission of infection
12.
13. INCUBATION PERIOD
Time from receipt of infection to the development of a
positive tuberculin test ranges from 3 to 6 weeks.
Development of disease depends upon the closeness of
contact, extent of disease & sputum positivity of the source.
Incubation period may be weeks, months or years
RESERVOIR:
Human case is the chief reservoir.
14. TYPES OF T1
B
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1. Pulmonary :
In active cases – most commonly involves the lungs (90% cases)
Symptoms – Chest pain & a prolonged cough
producing sputum
About 25% of people - asymptomatic
2. Extra pulmonary :
In 15–20% of active cases, the infection spreads outside the
lungs, causing other kinds of TB
More commonly in immunosuppressed persons and young
children
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15. Common sites are
Meninges
Lymph nodes
Bones & joints
Intestine
Genitourinary tract
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16. 21 9/12/2015
A potentially more serious, widespread form of TB -
"disseminated" TB - commonly known as Miliary
Tuberculosis.
Miliary TB -10% of extrapulmonary cases
17. CLINICAL FEA
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TURES
•Coughing that lasts two or more weeks
•Coughing up blood
•Chest pain, or pain with breathing or coughing
•Unexplained weight loss
•Fatigue
•Fever
•Night sweats
•Chills
•Loss of appetite
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34. PREVENTION &
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8
CONTRO
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L
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Primary prevention-
1. health education & specific protection.
2. Population strategy & high risk strategy
Secondary prevention- early diagnosis & specific
treatment
Tertiary prevention- rehabilitation & disability
limitation
35. BCG-VACCINE
🞇 The first human was vaccinated by the intradermal
technique in 1927
🞇 BCG is the only widely used live bacterial vaccine. It
consists of living bacteria derived from an attenuated
bovine strain of tubercle bacilli
🞇 The WHO has recommended the "Danish 1331" strain
for the production of BCG vaccine
🞇 Since January 1967, the BCG Laboratory at Guindy,
Chennai, has been using the "Danish 1331" strain for
the production of BCG vaccine
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36. CONT..
🞇 There are two types of BCG vaccine - the liquid
(fresh) vaccine and the freeze dried vaccine.
🞇 For vaccination. the usual strength is 0.1 mg 0.1
ml volume. The dose to newborn aged below 4
weeks is 0.05 ml.
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37.
38. RNTCP
Need for a Revised Strategy.
India has had an on-going National TB Program, NTP since
1962. Program reviews showed that only 30% of estimated
tuberculosis patients were diagnosed & treated successfully.
Based on the findings & recommendations of the review in 1992,
the GOI evolved a revised strategy and launched the Revised
National TB Control Programme (RNTCP)in the country.
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39. COMPONENTS OF RNTCP
1. The directly observed treatment short-course
(DOTS) strategy.
2. 'Stop TB Partnership ‘.
both are implemented as a comprehensive
package for TB control.
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49. SUMMARY
🞇 Despite all these national programmes & efforts from govt.
of India , TB still continues to be a major socio- economic
burden of the country
🞇 Still there is need to create awareness among health
care professionals, and the community.
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