title: Mesosomes are a definite event in antibiotic-treated Staphylococcus aureus ATCC 25923.
abstract: Mesosomes of Staphylococcus aureus ATCC 25923 treated with antibiotics were examined morphologically under the electron microscope. The Transmission Electron Microscope Rapid Method was used to eliminate the artifacts due to sample processing. Mesosomes were seen in all the antibiotic treated bacteria and not in the control group. The main factor that contributes to the formation of mesosomes in the bacteria was the mode of action of the antibiotics. The continuous cytoplasmic membrane with infolding (mesosomes) as in the S. aureus ATCC 25923 is therefore confirmed as a definite pattern of membrane organization in gram positive bacteria assaulted by amikacin, gentamicin, ciprofloxacin, vancomycin and oxacillin antibiotics. Our preliminary results show oxacillin and vancomycin treated bacteria seemed to have deeper and more mesosomes than those treated with amikacin, gentamicin and ciprofloxacin. Further research is needed to ascertain whether the deep invagination and the number of mesosomes formed is associated with the types of antibiotic used.
authors.affiliation: Electron Microscopy Unit, Institute for Medical Research, Jalan Pahang, 50588 Kuala Lumpur. santhana@imr.gov.my
authors.forename: L
authors.initials: L
authors.lastname: Santhana Raj
authors.forename: H L
authors.initials: HL
authors.lastname: Hing
authors.forename: Omar
authors.initials: O
authors.lastname: Baharudin
authors.forename: Z
authors.initials: Z
authors.lastname: Teh Hamidah
authors.forename: R
authors.initials: R
authors.lastname: Aida Suhana
authors.forename: C P
authors.initials: CP
authors.lastname: Nor Asiha
authors.forename: B
authors.initials: B
authors.lastname: Vimala
authors.forename: S
authors.initials: S
authors.lastname: Paramsarvaran
authors.forename: G
authors.initials: G
authors.lastname: Sumarni
authors.forename: K
authors.initials: K
authors.lastname: Hanjeet
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D002462:Cell Membrane / Q000187:drug effects; D013211:Staphylococcus aureus / Q000145:classification / Q000187:drug effects* / Q000648:ultrastructure*
chemical_list: D000900:Anti-Bacterial Agents