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Articles by J.S. Sohal
Total Records ( 3 ) for J.S. Sohal
  B.J. Stephen , S.V. Singh , Manali Datta , Neelam Jain , Sujata Jayaraman , K.K. Chaubey , S. Gupta , Manju Singh , G.K. Aseri , Neeraj Khare , Parul Yadav , Kuldeep Dhama and J.S. Sohal
  Tuberculosis, an infectious bacterial disease that affects the lungs is caused by Mycobacterium tuberculosis (MTB). It is the second most infectious disease after AIDS, which can affect both animals and humans. Johne’s Disease (JD) or paratuberculosis caused by in intracellular bacterium Mycobacterium avium subspecies paratuberculosis (MAP) is an incurable wasting disease known to affect a large number of domestic animals and poses serious threat to livestock industries through huge economic losses. Conventional diagnostic methods like enzyme linked immunosorbat assay (ELISA), Polymerase Chain Reaction (PCR), cultural isolation are identification for use in MAP detection while sputum smear microscopy and PCR techniques remain the gold standards for TB detection despite advancement in pathogen detection most of these diagnostic methods are time consuming and have low efficacy and this become a heavy burden to developing and underdeveloped countries. When nanoscale particles are used as tags or labels, measuring the activity or presence of an analyte becomes faster, flexible and highly sensitive. These advantages nanomaterials possess, research have now focused their attention to nanotechnology based detection. Though research have shown these test to be more sensitive, less laboratorious and less time consuming, more needs to be done to introduce point of care diagnostics into the global market. This review highlights the prospects of nanotechnology based diagnostic tests as valuable alternative for rapid detection of this economically important pathogen with high accuracy and precision.
  B.J. Stephen , Mukta Jain , Kuldeep Dhama , S.V. Singh , Manali Datta , Neelam Jain , Sujata Jayaraman , Manju Singh , K.K. Chaubey , S. Gupta , G.K. Aseri , Neeraj Khare , Parul Yadav and J.S. Sohal
  Johne’s Disease (JD) is a contagious fatal granulomatous enteritis, known to affect ruminants and is caused by the acid-fast Mycobacterium avium subspecies paratuberculosis (MAP). The bacterium has also been linked to Crohn’s Disease (CD) in humans. Treatment options are scarce with culling practiced in the case of Johne’s Disease (JD) and administration of anti-inflammatory drugs for pain and inflammation in case of CD. In both cases antimicrobial therapy against MAP does not have the ultimate potential. The very promising, yet untapped potential of nanotechnology offers a suitable platform for developing new therapeutic strategies for diseases caused by the bacteria. Uniformity, specificity and reproducibility are some of the characteristics of nanotechnology that can be exploited for the treatment of infectious diseases. Factors like cost, efficacy, safety and bioavailability of drugs can be greatly improved when the drugs are delivered with precision and at a controlled delivery rate to the target location. Nanotechnology can help in achieving these targets. This review discusses the current scenario of available therapeutic approaches and proposes drugs targeting strategies and vaccine development methods for the treatment and prevention of MAP related diseases.
  D.B. Barad , B.S. Chandel , A.I. Dadawala , H.C. Chauhan , H.S. Kher , S. Shroff , A.G. Bhagat , S.V. Singh , P.K. Singh , A.V. Singh , J.S. Sohal , S. Gupta , K.K. Chaubey , S. Chakraborty , R. Tiwari , R. Deb and K. Dhama
  Mycobacterium avium subspecies paratuberculosis (MAP) is the causative agent of chronic enteric granulomatous inflammation in animals and is known as Johne’s Disease (JD) or Paratuberculosis. JD, being spectral in nature, presents variable bacteriological, immunological and pathological spectra leading to variable efficacy of diagnostic methods at different points of time during the course of infection. The present study aimed to estimate the incidence of MAP in two important breeds of goats (Mehsani and Surti) from South Gujarat region of India by applying conventional, molecular and serological methods. A total 219 goats were screened and categorized into Group-I (123 Mehsani goats), Group-II (76 Surti goats) and Group-III, (20 Non-descript goats). Percent positivity by faecal smear examination, delayed type hypersensitivity (DTH), agar gel immunodiffusion (AGID), IS900 polymerase chain reaction) (PCR) and indigenous enzyme linked immunosorbent assay (ELISA) kit was 9.2 (7/76), 21.9 (27/123), 10.9 (24/219), 12.5 (5/40) and 43.3% (95/219), respectively. Of the 123 goats of Group-I, 27 (21.9%) were positive in DTH test. Of the 5 faecal positive goats which also showed clinical signs, 2 (3.5%) goats died during study were negative by Johnin test. Similar to these findings, sensitivity of Johnin test in goats ranged between 18-30% with least specificity in both preclinical and advanced stage of disease. Of 34 cases of caprine paratuberculosis, 73.5% goats were positive for Johnin test. In the present study, out of the 5 infected goats, 3 (60%) were positive in Johnin test. Rectal pinch smear examination was carried out in 27 DTH positive goats and all smears were negative for the presence of acid fast bacilli. Screening tests (Indigenous ELISA and DTH) showed very high incidence of MAP infection in the goat population. The utility of multiple diagnostic tests is suggested for confirmatory detection and epidemiological diseases investigations of MAP in animals.
 
 
 
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