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Assessment of Toxic Activity of Heat Labile Toxin from Bordetella pertussis Vaccine Strain 134 | OMICS International | Abstract

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Research Article

Assessment of Toxic Activity of Heat Labile Toxin from Bordetella pertussis Vaccine Strain 134

Shivanandappa KC1*, Jagannathan S1, Pandiyarajan S2, Vijayakumar R3, Umadevi T4, Jeeva Kalaiselvan1 and B Sekar1
1Pasteur Institute of India, Coonoor, The Nilgiris, Tamilnadu, India, PIN 643 103
2Department of Microbiology, JJ college of Arts and Science, Pudukkottai, Tamilnadu, India, PIN 622 422
3Department of Biochemistry, North Eastern Hill University, Shillong, Meghalaya, India, PIN 793 022
4Department of Biochemistry, P.S.G Arts and Science College, Coimbatore, Tamilnadu, India, PIN 641 014
Corresponding Author : Shivanandappa KC
Pasteur Institute of India, Coonoor
The Nilgiris, Tamilnadu, India. PIN 643 103
Tel: +91 9789327696
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Received: April 18, 2015; Accepted: June 27, 2015; Published: July 05, 2015
Citation: Shivanandappa KC, Jagannathan S, Pandiyarajan S, Vijayakumar R, Umadevi T, et al. (2015) Assessment of Toxic Activity of Heat Labile Toxin from Bordetella pertussis Vaccine Strain 134. Biochem Physiol 4:168. doi:10.4172/2168-9652.1000168
Copyright: © 2015 Shivanandappa KC, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Heat Labile toxin (HLT) is a mouse lethal toxin produced by all virulent Bordetella pertussis species. B. pertussis cells were dermo necrotizing and lethal when injected in to animals. Therefore in the present study the biological property of heat labile toxin of B. pertussis strain 134 was assessed before and after heat inactivation. The result found in SDS PAGE analysis of non-heat inactivated sample (NIS) shown apparent molecular mass of 102 kDa whereas it is absent in the Heat inactivated sample (HIS). The Mouse Weight Gain Test (MWGT) results shown that, after the culture cells were heated at 56ºC for 30 min (HIS) detoxification sample shown good weight gain in the mouse .In case of in NIS there was a decreased in weight, death of mice was also observed. The antigenic property was tested by agglutination test were found to be good in both samples proved the presence of factor 1and 3. Further the HIS and NIS samples were evaluated through ischemic and DNT tests, the sample NIS was tested in the guinea pig and mice, induced hemorrhagic and dermonecrosis reactions on the inoculated region of skin. All dermonecrotizing activity and a large part of the lethal toxicity were observed in guinea pig and mice. There was no such reactions were seen in case of HIS sample. If the cells were heated above 56ºC the virulence activities was substantially diminished. These biological effects of organisms are now known to be caused by Heat labile toxin which is also called dermonecrotic toxin. Hence HLT should be detoxified at 56ºC at 30 minutes is most preferred, during the production of Whole Cell Pertussis Vaccine.


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