SCREENING, ISOLATION, AND ANTIBACTERIAL ACTIVITY OF ANTIBIOTIC PRODUCING BACTERIA OBTAINED FROM SAPROPHYTIC SOIL SAMPLES

ABSTRACTObjective: The aim of the study was conducted to screen and isolate potential antibiotic producing bacteria from saprophytic soils collected fromPotheri and Nandiambakkam.Methods: Soil was collected aseptically and subjected to serial dilution. Crowded plate technique was used for the isolation of the colony. Totallyseven isolates were isolated and were screened for their antibacterial activity. The three isolates (S2A, S2B, and S3A) having better zone of inhibitionwere selected for morphological, microscopical, and biochemical test to prove their validity. The selected isolates were partially purified. The partiallypurified samples further screened for antibacterial activity, minimum inhibitory concentration (MIC) and the isolates, which shown good zone ofinhibition were subjected to 16S rRNA sequencing studies to determine the species.Results: The isolates screened based on size of the zone formed. Best isolate selected by zone of inhibition was subjected to antibacterial activity,morphological, microscopical, and biochemical test, partial purification of three isolates and further screened for antibacterial and MIC. The isolateshowed good zone of inhibition compared to others by MIC was selected for 16S rRNA sequencing studies. Genomic DNA extracted from isolate S2Bconforms it belongs to Pseudomonas species which is named as Pseudomonas putida 2435.Conclusion: The research work revealed that the three isolates showed good antibacterial activity against Gram-positive and Gram-negative bacteria.The S2B isolate was confirmed to P. putida 2435 by 16S rRNA studies.Keywords: Isolation of soil microbes, Biochemical characterization, Antimicrobial activity, Minimum inhibitory concentration, 16S rRNA sequencing,Pseudomonas putida

Phytochemical Screening and Antimicrobial Activity of the Plant Extracts of Mimosa pudica L. Against Selected Microbes

Mimosa pudica L. is a creeping annual or perennial herb. It has been identified as Lajjalu in Ayurveda and has been found to have antiasthmatic, aphrodisiac, analgesic and antidepressant. In the present study the active phytocomponents of Mimosa pudica were revealed using phytochemical analysis. The antimicrobial activity of Mimosa was studied using well diffusion method. The activity was tested against Aspergillus fumigatus, Citrobacter divergens and Klebsiella pneumonia at different concentrations of 50, 100 and 200μg/disc and the results have been illustrated

A prospective evaluation of efficacy and safety of topical bromfenac 0.09% over topical flurbiprofen 0.03% after cataract surgery

Background: Different medications are used to reduce pain and inflammation after cataract surgery. Hence this study was taken up to compare the efficacy and safety of topical bromfenac 0.09% over topical flurbiprofen 0.03% in reducing anterior chamber inflammation and pain after cataract surgery.Methods: Total of 100 patients who underwent uneventful cataract surgery with posterior chamber intra ocular lens (IOL) implantation were randomly allocated to receive bromfenac 0.09% and flurbiprofen 0.03% topically from first post-operative day onwards for 6 weeks. Assessment of anterior chamber inflammation and pain was done by slit lamp and visual analogue scale respectively on each follow up days. Analysis was done by unpaired t test and Fischer’s exact test.Results: The response to treatment was earlier in bromfenac group for all the inflammatory changes (significant difference was found on day 7, p<0.05) except for corneal edema where both the groups showed similar response. On 7th day after surgery, 72% patients in flurbiprofen group and 12% in bromfenac group had pain (score1), while on the 14th day none in the bromfenac group complained of pain whereas 4% in flurbiprofen group still had pain. Both the drugs were safe and no clinically serious adverse effects were observed in either of the groups.Conclusions: This study showed both the medications, topical bromfenac 0.09% and topical flurbiprofen 0.03% effective and safe in reducing pain and anterior chamber inflammation after cataract surgery but the response was earlier with bromfenac 0.09%

Maternal and perinatal outcome in eclampsia complicated by posterior reversible encephalopathy syndrome; a three years’ experience in a tertiary care hospital

Background: PRES can be associated with number of medical conditions and was observed frequently in patients with preeclampsia and eclampsia. Neuroimaging is important for the diagnosis of PRES. Study was conducted to find out the maternal and perinatal outcome in patients with eclampsia complicated by posterior reversible encephalopathy syndrome (PRES).Methods: This is a retrospective study done at St. Johns Medical College Bangalore, between October 2013 and October 2016. We reviewed case records of all the patients with eclampsia who underwent neuro imaging studies and a diagnosis of PRES was made. The maternal and perinatal outcomes in these women were studiedResults: In the past three years we had 55 cases of eclampsia who underwent neuroimaging studies for persistent neurological symptoms after 24 hours of MgSO­4 treatment. Of these women 30 were diagnosed to have PRES. In the present study PRES was common in multiparous women and more in patients with antepartum eclamptic women. Mean age at diagnosis of PRES was 26±5.1 years. Common presenting symptoms were headache (93.3%) and vomiting (53.3%). The mean SBP/DBP was 180/110 mmHg. All patients who had recurrent seizures were controlled with MgSO­4 alone. 53.3% of our patients had eclampsia related complications and 36.7% required ICU care. There were 3 maternal deaths (10%). Perinatal mortality was 20%.Conclusions: Neuroimaging in eclamptic patients with persistent neurological symptoms could help in early diagnosis of PRES and multidisciplinary approach in management could contribute significantly in reducing the maternal mortality and morbidity

N-Butyl­pyridine-4-thio­carboxamide

In the title mol­ecule, C10H14N2S, the n-butyl chain assumes a trans zigzag conformation. The dihedral angle between the pyridine ring and the thio­amide plane is 23.38 (8)°. The mol­ecules in the crystal structure are linked by an inter­molecular N—H⋯N hydrogen bond

Crystal structure of 1-(3-chloro­phen­yl)piperazin-1-ium picrate–picric acid (2/1)

The title salt {systematic name: bis­[1-(3-chloro­phen­yl)piperazinium 2,4,6-tri­nitro­phenolate]–picric acid (2/1)}, 2C10H14ClN2+·2C6H5N3O7−·C6H6N3O7, crystallized with two independent 1-(3-chloro­phen­yl)piperazinium cations, two picrate anions and a picric acid mol­ecule in the asymmetric unit. The six-membered piperazine ring in each cation adopts a slightly distorted chair conformation and contains a protonated N atom. In the picric acid mol­ecule, the mean planes of the nitro groups in the ortho-, meta-, and para-positions are twisted from the benzene ring by 31.5 (3), 7.7 (1), and 3.8 (2)°, respectively. In the anions, the dihedral angles between the benzene ring and the ortho-, meta-, and para-nitro groups are 36.7 (1), 5.0 (6), 4.8 (2)°, and 34.4 (9), 15.3 (8), 4.5 (1)°, respectively. The nitro group in one anion is disordered and was modeled with two sites for one O atom with an occupancy ratio of 0.627 (7):0.373 (7). In the crystal, the picric acid mol­ecule inter­acts with the picrate anion through a trifurcated O—H⋯O four-centre hydrogen bond involving an intra­molecular O—H⋯O hydrogen bond and a weak C—H⋯O inter­action. Weak inter­molecular C—H⋯O inter­actions are responsible for the formation of cation–anion–cation trimers resulting in a chain along [010]. In addition, weak C—H⋯Cl and weak π–π inter­actions [centroid–centroid distances of 3.532 (3), 3.756 (4) and 3.705 (3) Å] are observed and contribute to the stability of the crystal packing

FTIR SPECTROSCOPIC METHOD FOR QUANTITATIVE ANALYSIS OF GLICLAZIDE IN TABLETS

A rapid FTIR spectroscopic method has been proposed for the estimation of Gliclazide in bulk drug and pharmaceutical dosage form. The method involves the measurement of the area of the infrared band corresponding to the amide stretching centered at 3317cm-1. The excipients in the commercial tablet preparation did not interfere with the assay. The linearity range was found to be 4-24µg/ml. The technique is reliable and useful for quality control for monitoring the adulteration of pure drug. The proposed method is statistically validated and found to be useful for the routine determination of gliclazide in tablets. Keywords:Gliclazide, FTIR, Tablets, Validation

Synergy of Nitric Oxide and Silver Sulfadiazine against Gram-Negative, Gram-Positive, and Antibiotic-Resistant Pathogens

The synergistic activity between nitric oxide (NO) released from diazeniumdiolate-modified proline (PROLI/NO) and silver (I) sulfadiazine (AgSD) was evaluated against Escherichia coli, Enterococcus faecalis, Proteus mirabilis, Pseudomonas aeruginosa, Staphylococcus aureus and Staphylococcus epidermidis using a modified broth microdilution technique and a checkerboard-type assay. The combination of NO and AgSD was defined as synergistic when the fractional bactericidal concentration (FBC) was calculated to be <0.5 Gram-negative species were generally more susceptible to the individual antimicrobial agents than the Gram-positive bacteria. The in vitro synergistic activity of AgSD and NO observed against a range of pathogens strongly supports future investigation of this therapeutic combination, particularly for its potential use in the treatment of chronic and burn wounds

Altered Macrophage Function Contributes to Colitis in Mice Defective in the Phosphoinositide-3 Kinase Subunit p110δ

Innate immune responses are crucial for host defense against pathogens, but need to be tightly regulated to prevent chronic inflammation. Initial characterization of mice with a targeted inactivating mutation in the p110d subunit of phosphoinositide 3-kinase (PI3K p110δD910A/D910A) reveal defects in B- and T-cell signaling and chronic colitis. Here, we further characterize features of inflammatory bowel diseases (IBD) in these mice and investigate underlying innate immune defects