Laboratory Technicians: Terms of Reference [TORs] at the Intermediate Reference Laboratory
One of the human resources required in the Intermediate Reference Laboratory (IRL) is the Senior Laboratory Technician (LT).
The Terms of Reference (TORs) of the Senior LT are:
TB Screening: Children Younger than 10 Years
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Children younger than 10 years form one of the important vulnerable groups for Tuberculosis.
The vulnerable children under 10 years are categorised into the following three main categories and they are screened differently for TB (Figure).
Strategic TB Screening Interventions for the key populations
Under the National Strategic Plan (NSP) 2020-25, systematic screening of high-risk groups through outreach and community-based approaches using digital X-rays and rapid and more sensitive diagnostic tools is planned via:
TB Screening Tools: Chest X-ray as a Triage Tool
Chest radiography or X-ray (CXR) can be used as an effective triage test for those seeking care for respiratory complaints.
It is an effective triage tool in tuberculosis (TB) because:
Sensitivity and Specificity of Different TB Screening Tools
The pooled sensitivity and specificity of screening tests in adults, using culture-confirmed pulmonary tuberculosis (TB) as the gold standard, are summarized in Table 1.


TB Screening Tools
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Screening for active tuberculosis (TB) should be done with a tool that:
- Effectively identifies people who probably have active TB
- Has high sensitivity (very high specificity is not necessary for a screening tool)
- Needs to be inexpensive
- Should be feasible to use in a given setting
- Is acceptable to a given risk group.
Options for the screening for TB include:
Vulnerable Population Mapping for TB Screening
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A vulnerable population is a group of people in whom the prevalence or incidence of tuberculosis (TB) is significantly higher than in the general population.
TB Screening: Children Younger than 10 Years
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