Effect of bacteriophage lysin on lysogens

ABSTRACT

<p><b>OBJECTIVE</b>To study the effect of phage lysin on the growth of lysogens.</p><p><b>METHODS</b>Sputum specimens processed by modified Petroff's method were respectively treated with phagebiotics in combination with lysin and lysin alone. The specimens were incubated at 37 °C for 4 days. At the end of day 1, 2, 3 and day 4, the specimens were streaked on blood agar plates and incubated at 37 °C for 18-24 hours. The growth of normal flora observed after day 1 was considered as lysogens.</p><p><b>RESULTS</b>Sputum specimens treated with phagebiotics-lysin showed the growth of lysogens. When specimens treated with lysin alone, lysogen formation was avoided and normal flora was controlled.</p><p><b>CONCLUSIONS</b>Lysin may have no effect on the growth of lysogens.</p>