BACTE LAB - DOTS/Lab Flashcards Preview

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Flashcards in BACTE LAB - DOTS/Lab Deck (42):
1

form the foundation of National Tuberculosis Control Program
one of the first points of contact for TB suspects

Laboratories

2

internationall recommended strategy for TB control by WHO and IUATLD

DOTS

3

IUATLD meaning

International Union Against Tuberculosis and Lung Diseases

4

goal of Stop TB Strategy

Reduce global burden of TB by 2015 by ensuring all TB patients benefit from universal access to high-quality diagnosis and patient-centered treatment

5

Six Point Stop TB Strategy

Pursue quality DOTS expansion and enhancement
Address TB/HIV and MDR-TB
Contribute to health system strengthening
Engage all care providers
Empower patients and communities
Enable and promote research

6

Main technique for diagnosis of TB utilized by DOTS program

DSSM

7

DSSM meaning

Direct Sputum Smear Microscopy

8

Primary sources of infection in communities

Smear-positive cases

9

These smear cases are usually sick and seek treatment

smear positive pulmonary TB

10

Criteria in monitoring that are not specific

Clinical and radiologic

11

it seldom possible to diagnose relapse by means of ___

chest xray

12

3 Things Monitored by Bacteriological Methods

Evolution of disease during treatment
declaration of cure or failure
relapse

13

for follow-up, this procedure is more sensitive and reliable than dssm

culture

14

why is culture more sensitive and reliable than DSSM for follow-up

culture will detect only living bacilli that form colonies
Microscopy (DSSM) will show all AFB, alive or dead

15

Declaration of failure on smear evidence is more accurate when based on _____

REPEATED positive smears

16

Reliable diagnosis of relapsing cases

Smear diagnosis

17

Why culture cannot easily replace smears for follow-up

M. tuberculosis grows very slowly
Repeating a smear examination after 2 weeks will yield an answer before a culture could

18

Greatest risk of infection for lab staff

Sputum collection

19

Considerable risk for lab tech

Processing of sputum for culture and drug susceptibility testing

20

---particles do not remain airborne and do not transmit TB efficiently

Larger

21

Bacterial load smear +

10^6 to 10^7 bacilli per ml

22

Bacterial load smear -

10^4 or less bacilli per ml

23

Most significant predictor of infectiousness of a patient

Difference in bacterial load

24

Risk of infection depends on (4)

Infectiousness of source
Environment
Duration and intensity of exposure
Susceptibility of recipient

25

Mechanisms of producing droplet nuclei

Singing and coughing

26

Where to collect sputum

Open area outisde environment

27

Where not to collect

Enclosed spaces like labs toilets

28

Never stand where during collection

In front of patient

29

3 separate areas for performing tb microscopy

Smear preparation and staining
Performing microscopy
Record keeping and storage

30

Use ____ instead of surgical masks

N95 or HEPA filter masks

31

True or False wearing gloves can give technologists a false sense of safety

True

32

Are gloves necessary to perform sputum microscopy

No. Can still perform even w/o those

33

Lab coats must be tied back or front

Back

34

Lab coats prevent Tb Infection true or falsd

False

35

Excellent disinfectant for cleaning up sputum spills

Phenolic agents

36

Gen disinfectant

Fresh household bleach diluted 1:10 with water

37

Good agent for cleaning bench tops

70% alcohol

38

T or F
N95 respirator is unneccessary if technologist uses appropriate techniques

True

39

Wearing of gloves is encouraged in smear preparation

T

40

Once collected, allow a sputum sx to stand undistirbed for -- min to (why)

At least 20 min to settle any aerosols

41

How to remove residual sputum on wire loops

Insert or dip wire loop in alcohol sand washed bottle then flame

42

These reduces the spread of TB

detection and treatment of infectious cases

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