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Bidirectional Screening
Learning ObjectivesDiscuss the concept of bi-directional screening as an approach in case finding.
Bidirectional screening is a method to identify cases in diseases which have predisposition to each other or has a significant influence on each other. For example TB and HIV, where having HIV increases risk of developing TB and cases with TB would have poor outcomes if co-infected with HIV.
Screening for TB is done through four-symptoms complex based screening or through Chest X-ray. Screening for the linked disease is carried out as per the policies of the corresponding health program.
Bi-directional screening policies are implemented by various disease control programs. For example, with NTEP the following disease prevention and cure efforts implement a bidirectional screening policy:
- HIV through NACO
- COVID19
- Diabetes Mellitus (DM) through NPCDCS
- Tobacco through National Tobacco Control Program
Both programs monitor bidirectional screening, referral and testing as per their own policies.
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| Question | Answer 1 | Answer 2 | Answer 3 | Answer 4 | Correct answer | Correct explanation | Page id | Part of Pre-test | Part of Post-test |
| Bidirectional screening for TB is not done in which of the following conditions? | Diabetes | Tobacco abuse/ addiction | Pregnancy | COVID-19 | 3 | Although pregnant mothers may be screened for TB as a part of intensified case finding, all TB cases are not actively/ routinely screened for pregnancy. | Yes | Yes |
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