INACTIVATION OF VANCOMYCIN-INDUCED UNSTABLE L-FORMS OF STAPHYLOCOCCUS AUREUS BY HORSE SERUM

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NOJOOMI FARSHAD; BEHZADIAN NEJAD GHORBAN; SIADAT SEYED DAVAR

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Journal: INTERNATIONAL JOURNAL OF MOLECULAR AND CLINICAL MICROBIOLOGY Year:2011 | Volume:1 | Issue:2 Page(s): 77-81

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Title

INACTIVATION OF VANCOMYCIN-INDUCED UNSTABLE L-FORMS OF STAPHYLOCOCCUS AUREUS BY HORSE SERUM

Author(s)

NOJOOMI FARSHAD | BEHZADIAN NEJAD GHORBAN | SIADAT SEYED DAVAR | Issue Writer Certificate

Keywords

UNSTABLE L-FORMS

STAPHYLOCOCCUS AUREUS

HORSE SERUM

VANCOMYCIN

Abstract

Substitution at codon Ser315 of katG gene, a reliable marker for isoniazid (INH) resistance and proliferate in spite of the loss of cell wall is called an L-form. UNSTABLE L-FORMS can convert to normal cells but stble L-forms cannot. cell wall-deffective state may be induced spontaneously or through the action of an appropriate agent such as antibiotic interfering with the synthesis of cell wall peptidoglycan. VANCOMYCIN is one of these antibiotics which cause L-form formation in some strains of STAPHYLOCOCCUS AUREUS in presence of osmoprotective compounds. HORSE SERUM and some of organic or mineral materials can be used for better isolation of L-forms in vitro. In this study, standard strain of STAPHYLOCOCCUS AUREUS (ATCC 25923) was inoculated to 2 media: i) L phase medium (LPM) agar containing HORSE SERUM & ii) LPM agar without HORSE SERUM. Sucrose was used in both above mentioned growth media as osmoprotective and VANCOMYCIN was used for inducing L-forms. Microscopic examination revealed presence of small and large colonies on LPM agar lacking HORSE SERUM and only large colonies on LPM agar containing HORSE SERUM after 3-4 days. induced by HORSE SERUM were unable to form colony in LPM agar containing HORSE SERUM. Results showed that UNSTABLE L-FORMS of STAPHYLOCOCCUS AUREUSin the presence of HORSE SERUM neither can survive nor convert to normal cells.

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APA: Copy

NOJOOMI, FARSHAD, BEHZADIAN NEJAD, GHORBAN, & SIADAT, SEYED DAVAR. (2011). INACTIVATION OF VANCOMYCIN-INDUCED UNSTABLE L-FORMS OF STAPHYLOCOCCUS AUREUS BY HORSE SERUM. INTERNATIONAL JOURNAL OF MOLECULAR AND CLINICAL MICROBIOLOGY, 1(2), 77-81. SID. https://sid.ir/paper/328052/en

Vancouver: Copy

NOJOOMI FARSHAD, BEHZADIAN NEJAD GHORBAN, SIADAT SEYED DAVAR. INACTIVATION OF VANCOMYCIN-INDUCED UNSTABLE L-FORMS OF STAPHYLOCOCCUS AUREUS BY HORSE SERUM. INTERNATIONAL JOURNAL OF MOLECULAR AND CLINICAL MICROBIOLOGY[Internet]. 2011;1(2):77-81. Available from: https://sid.ir/paper/328052/en

IEEE: Copy

FARSHAD NOJOOMI, GHORBAN BEHZADIAN NEJAD, and SEYED DAVAR SIADAT, “INACTIVATION OF VANCOMYCIN-INDUCED UNSTABLE L-FORMS OF STAPHYLOCOCCUS AUREUS BY HORSE SERUM,” INTERNATIONAL JOURNAL OF MOLECULAR AND CLINICAL MICROBIOLOGY, vol. 1, no. 2, pp. 77–81, 2011, [Online]. Available: https://sid.ir/paper/328052/en

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