Comparative evaluation of various in-house protocols on diagnostic performance for paratuberculosis IS900 PCR.
Mol Biol Rep
; 50(1): 943-947, 2023 Jan.
Article
en En
| MEDLINE
| ID: mdl-36371554
ABSTRACT
BACKGROUND:
Paratuberculosis is a worldwide endemic infectious disease of ruminants that results in high economic losses. Public health concerns are also being raised with human Crohn's disease. Therefore, control is becoming priority for governments. Control is largely dependent on "Test and Cull" or "Test and Segregate" policy. Hence, it is critical to assure the infection before making the decision. Commercial kits are costly especially in view of resource limited areas. Present study analyzed the performance various in house DNA isolation methods and PCR master mix combinations to optimize a protocol for confirmation of paratuberculosis bacilli shedding in feces. METHODS ANDRESULTS:
Present study included five protocols of fecal DNA isolation (chemical, bio-chemical, physio-chemical and physical) and three reaction mixes (based on Qiagen, Genei and Thermo 2X master mixes) in nine different combinations using additives and tested their performance for IS900 PCR. Spiked fecal samples were used to select the best combination of DNA isolation method and PCR master mix (PRM). Selected combination was used to test reference (positive and negative) fecal samples and field samples. Findings revealed that combination physical method of DNA isolation and Genei based PRM (with additives; betaine DMSO and BSA) had lowest limit of detection. Sensitivity was 83% and specificity was 100% in comparison to fecal culture. High prevalence (23%) was reported for paratuberculosis on field samples.CONCLUSION:
Optimized protocol has acceptable sensitivity and can easily be adopted in resource-limited laboratories. High prevalence of paratuberculosis needs immediate implementation of the control strategies.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Paratuberculosis
/
Enfermedades de los Bovinos
/
Mycobacterium avium subsp. paratuberculosis
Tipo de estudio:
Diagnostic_studies
/
Guideline
/
Prognostic_studies
/
Risk_factors_studies
Límite:
Animals
/
Humans
Idioma:
En
Revista:
Mol Biol Rep
Año:
2023
Tipo del documento:
Article
País de afiliación:
India