Visceral Leishmaniasis Diagnostic Test Sensitivity & Specificity
The diagnosis of visceral leishmaniasis relies on tests with high diagnostic accuracy, specifically measured by sensitivity and specificity.
- Sensitivity refers to a test's ability to correctly identify those *with* the disease (true positive rate).
- Specificity refers to a test's ability to correctly identify those *without* the disease (true negative rate).
Among the options provided:
The Strip test for recombinant $K_{39}$ antigen is widely regarded as the superior diagnostic method for visceral leishmaniasis. It demonstrates a favorable combination of high sensitivity and high specificity, leading to more accurate diagnoses and fewer false results compared to other serological assays.
While other tests like direct agglutination, latex agglutination, and fluorescent dye-tagged antibodies can be used, they often exhibit lower sensitivity or specificity, or present practical challenges, making the $K_{39}$ strip test the preferred choice for reliable detection.
Important Questions from Protozoal Infections
Which of the following pharmacological agents can be used for the treatment of visceral Leishmaniasis?
1. Pentavalent antimonials
2. Amphotericin B
3. Spiramycin
4. Paromomycin
Select the correct answer using the code given below:
- The Sabin-Feldman dye test is an indirect fluorescent antibody test which is used to detect antibodies against which of the following organisms?
Consider the following statements with regard to giardiasis :
1. Stools should be examined for cysts at 2-3 days interval for its diagnosis.
2. Colonoscopy aspirate gives the highest diagnostic yield.
3. Infection usually occurs by ingesting contaminated water.
4. Giardia has a flagellate trophozoite form.
Which of the statements given above are correct?
- Infection with which of the following organisms can cause a syndrome which is clinically indistinguishable from achalasia of the oesophagus?
- Which one of the following diseases is NOT caused by protozoa?
