The reliability of the bacitracin inhibition test to differentiate between 125 Lancefield group A and 122 non-group A beta-haemolytic streptococci was studied. Bacitracin discs containing 0-02, 0 04, or 0-1 international units and the conditions recommended by both the Association of Clinical Pathologists and the Federal Drug Administration for routine sensitivity testing were used. The results...

A total of 112 soil samples were taken from differents areas of district D.I.Khan and Kohat (KPK) Pakistan and screened for production of antibiotics against the Micrococcus luteus and Staphylococcus aureus. Widest zone of inhibition (18mm) was produced by microorganism isolated from saline soil. The strain was later identified as Bacillus GU057 by standard biochemical assays. Maximum activity ...

Paper discs containing 5 microng of novobiocin were used as a presumptive test to differentiate peptococci and peptostreptococci. Zone diameters were measured and minimum inhibitory concentrations (MIC) of the antibiotic for each group were performed to ascertain the activity of the antibiotic against these genera. All strains of peptococci showed no zone of inhibition in the disc test together...

A polymeric-resin-based microbiological assay is shown to yield results consistent with classical inhibition zone theory. This novel assay is applicable to cycloheximide, an antifungal antibiotic, at concentrations below 1.0 mug/mL and up to 800 mug/mL. Addition of ethanol to the cut-out wells of the assay plate helps to release the antibiotic and drastically increases the inhibition zone size....

Interaction among primary afferents, corticofugal fibers, and intrinsic elements allows for sensorimotor integration at the dorsal column nuclei. The interneurons permit the spatial localization, the recurrent collaterals synchronize the activity of projecting cells with overlapping receptive fields, and the corticofugal fibers induce a central zone of activity surrounded by a peripheral zone o...

The minimal inhibitory concentration of netilmicin determined by the agar dilution method was correlated with the disk diffusion zone of inhibition against 322 clinical isolates. Regression line analysis revealed good correlation, r = -0.90, and suggested that isolates with zone sizes </=14 mm should be considered resistant.

The present study was carried out to find out the antimicrobial activity of aqueous, acetone and ethyl acetate extract of Morus nigra and Citrus limon. Antimicrobial analysis was done by using agar well diffusion method against bacterial pathogens. Ethyl acetate extract of Morus nigra exhibited the maximum zone of inhibition against Staphylococcus aureus, while ethyl acetate extract of Citrus l...

315 than where total inhibition zones had formed. The important observation to make is that, outside of the inhibition zone, the inoculated cells multiplied to form visible colonies despite being in the triclosan vapour for up to 72 h at 22°C. This is entirely in accord with zone theory and, of course, everyday experience with diffusion susceptibility tests. It is unlikely therefore that at amb...

The plant Acmella Paniculata commonly known as Akala Kara belonging to family of Asteraceae mainly found in tropical and subtropical regions around the world. Annual herb grown upto 30 cm tall with pungent taste. All parts of this plant are being used to traditional medicine to treat various diseases. Pet ether, chloroform, ethyl acetate and methanol extracts from whole plant of Acmella Panicul...

The reliability of the bacitracin inhibition test to differentiate between 125 Lancefield group A and 122 non-group A beta-haemolytic streptococci was studied. Bacitracin discs containing 0-02, 0-04, or 0-1 international units and the conditions recommended by both the Association of Clinical Pathologists and the Federal Drug Administration for routine sensitivity testing were used. The results...