Phage lysin to supplement phagebiotics to decontaminate processed sputum specimens

Subramanyam, B and Kumar, V and Perumal, V and Nagamiah, S (2010) Phage lysin to supplement phagebiotics to decontaminate processed sputum specimens. European Journal of Clinical Microbiology and Infectious Diseases, 29 (11). pp. 1407-1412. ISSN Print: 0934-9723 | Electronic: 1435-4373

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Abstract

The overgrowth of normal flora escaping the action of sputum processing chemicals is the major problemin brothbased tuberculosis (TB) detection systems. The use of phages to control the overgrowth of normal flora in processed sputum samples has already been established. Phage lysin and its supplementation to phagebiotics for the effective control of normal flora in sputumspecimens were evaluated. Crude lysin was prepared from phage host mixture using standard procedures. About 120 sputum samples processed with 4% NaOH were collected and used to evaluate the effect of lysin, phagebiotics and phagebiotics supplemented with lysin on the overgrowth of normal flora. The effect of phagebiotics and lysin on the growth and retrieval of Mycobacterium tuberculosis was studied by conventional methods and the luciferase reporter phage (LRP) assay. Lysin alone and phagebiotics supplemented with lysin arrested the growth of normal flora in a significantly greater number of samples than phagebiotics alone. Lysin and phagebiotics did not show any inhibitory activity on M. tuberculosis. The use of antibiotics can be replaced by lysin or phagebiotics supplemented with lysin to control the overgrowth of normal flora in processed sputum samples without hampering the viability of M. tuberculosis.

Affiliation:	ICMR-National Institute for Research in Tuberculosis
Item Type:	Article
Uncontrolled Keywords:	Phage lysin, phagebiotics, sputum specimens
Subjects:	Tuberculosis > Laboratory Research > Bacteriological
Divisions:	Basic Science Research > Bacteriology
Depositing User:	Dr. Rathinasabapati R
Date Deposited:	01 Jun 2022 10:34
Last Modified:	01 Jun 2022 10:34
URI:	http://eprints.nirt.res.in/id/eprint/1070

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