ISOLATION AND CHARACTERISATION OF ANTI-BACTERIAL RESISTANCE PATTERNS OF BACTERIAL ISOLATES FROM URINARY TRACT INFECTION IN DIABETICS

Objective: Urinary tract infection (UTI) is one of the most common infections observed in diabetic patients. This study is aimed at identifying the organisms with their anti-bacterial resistance pattern. Methods: A total of 400 diabetic patients over a period of nine months presenting with symptom s of urinary tract infection were taken for the study. Their urine were cultured and an antibiogram done. Results: E. coli, Klebsiella and Enterococci were the commonest organism found. It was found that E. coli, which was the commonest organism E. Coli was sensitive to Norfloxacin and resistant to Ciprofloxacin. Conclusion: Empirical treatment with ciprofloxacin, Which is considered the drug of choice, will lead to failure of treatment

PREVALENCE AND TYPE OF MICROORGANISMS ISOLATED FROM PHONES USED BY MEDICAL STAFFS/STUDENTS, WORKING/STUDYING IN A TERTIARY CARE CENTER

Objective: To find out the prevalence and type of microorganisms isolated from mobile phones used by health care workers, students working/studying in a tertiary care center as well as to find the rate of contamination of the hands of the individual. Methods: Swabs moistened with sterile saline was used to swab on phone surfaces and was incubated using standard culture and identification methods. The respective user was instructed to imprint their fingers of both hands on plates of culture media. These were incubated and processed as per standard culture methods. Results: The most common isolated microorganisms in both groups were Coagulase-negative Staphylococci (CoNS) and MSSA. Among Mobile phones of HCW, the highest contamination rate was noted in physicians 70% followed by Intensive care doctors 60%, and Nurses. Finger impression growth rate was observed high among Nurses 70% followed by Intensive care doctors 60% and physicians 40%. Conclusion: There is found to be a moderate contamination rate of mobile phones and fingers with pathogenic bacteria as well as normal flora of skin isolated from health care workers. Mobile phones and hands of Health care workers serve as a potential reservoir for hospital-acquired infections as multi-drug resistant pathogenic bacteria. In order to reduce the incidence of nosocomial infections, there should be an implementation of handwashing practices

COMPARISON OF ANTIBACTERIAL ACTIVITY OF EXTRACT OF PROSOPIS JULIFLORA SEEDS AGAINST AEROBIC AND ANAEROBIC BACTERIA

Objective: To compare the antibacterial activity of prosopisjuliflora seed extract against aerobic and anaerobic bacteria. Methods: A cross sectional study was conducted for 6 mo in the clinical microbiology laboratory of SMCH. Agar cup diffusion technique is used to isolate the strains of Clostridium perfringens ATCC 3624, Staphylococcus aureus ATCC 25923 and Escherechiacoli ATCC 25922. The prosopisjulifloraseeds are collected from the saveetha medical college. Results: By performing the research with proper guidance it is observed that all the three bacterias–Staphylococcus aureus, Escherechia coli, Clostridium perfringens showed sensitivity to prosopisjulifloraseed extract. Conclusion: Due to its vast antibacterial activity it can be used along with other antibiotics to increase its efficacy. This is used for the treatment of infectious diseases

ANTIBACTERIAL EFFECTIVENESS OF PROSOPIS JULIFLORA AGAINST AEROBIC AND ANAEROBIC BACTERIA

Objective: The aim of this study is to analyse the antibacterial effectiveness of the leaf extract of Prosopis juliflora against aerobic and anaerobic bacteria and the objectives include maintaining the culture of Clostridium perfringens ATCC 3624, Staphylococcus aureus ATCC 25923, E. coli ATCC 25922 and to obtain an extract from the leaves of Prosopis juliflora by water extraction method. Agar cup diffusion testing is carried out to test the effectiveness of the extracted herb against the isolated strains of the above-mentioned bacteria. Methods: Cross-sectional study was conducted for 6 mo in the Clinical Microbiology Laboratory at SMCH. Extract from the leaves of Prosopis juliflora was collected by a water extraction method. Isolation of Clostridium perfringens (from RCMB), Staphylococcus aureus and Escherichia coli were done, following which the agar cup diffusion method was performed in which the collected extracts were placed as discs in the agar plate which had been inoculated with the strains of the isolated bacteria. The agar plate was then incubated anaerobically. Agar cup diffusion method is considered as a primary method to determine the antimicrobial effectiveness of the bacteria. Results: The leaf extract of Prosopis juliflora was found to be effective against both aerobic and anaerobic bacterial strains. Conclusion: Based on the work, the effectiveness of Prosopis juliflora was determined and the mechanism of susceptibility was identified. With future research works in the field, many such natural herbal extracts can be proven to be effective against many pathogenic microorganisms

PUNICA GRANATUM RIND EXTRACT: ANTIBIOTIC POTENTIATOR AND EFFLUX PUMP INHIBITOR OF MULTIDRUG RESISTANT KLEBSIELLA PNEUMONIAE CLINICAL ISOLATES

ABSTRACTObjective: With a rise in multidrug resistant (MDR) bacterial isolates, search for antibiotics or compounds that could act synergistically with themis a significant area of research. Efflux-mediated resistance, in particular, is a great hurdle that needs to be overcome. In an effort to identify suchsynergistic compounds and potential efflux pump inhibitors (EPI), we analyzed the rind of Punica granatum (pomegranate) against MDR clinicalKlebsiella pneumoniae isolates.Methods: Sequential fractionation of P. granatum rind ethanol (PGR) extract was carried out to obtain hexane, butanol and water fractions.Antibacterial activity of the plant extracts was confirmed, and synergistic interaction with antibiotics was determined by the checkerboard assay. Gaschromatography-mass spectrometry (GC-MS) analysis was performed to identify the phytochemical constituents of the hexane extract. To study EPIactivity of the extracts, norfloxacin accumulation assay was carried out.Results: PGR ethanol extract was found to have synergistic activity with ciprofloxacin, levofloxacin, ceftazidime, cefoxitin, meropenem, and gentamicinresulting in fold decrease of minimum inhibitory concentration (MIC) ranging from 2 to 32 fold. The hexane fraction was found to have maximumsynergistic activity resulting in a 32-fold reduction of ciprofloxacin MIC followed by butanol and water fractions. The PGR ethanol extract was alsofound to have efflux inhibition activity by the norfloxacin accumulation assay. Of the sequential fractions, the butanol fraction had maximum effluxinhibition activity.Conclusion: Therefore, our study shows that PGR extract can potentiate the effect of antibiotics on MDR bacteria, and the mode of action is likely tobe due to EPI.Keywords: Punica granatum rind, Pomegranate, Synergy with antibiotics, Multidrug resistant, Klebsiella pneumoniae, Efflux pump inhibition

IN VITRO EFFICACY TESTING OF NEEM (AZADIRACHTA INDICA) EXTRACT AGAINST AEROBIC AND ANAEROBIC BACTERIA

Objective: To experiment the antimicrobial susceptibility of crude extract from neem (Azadirachta indica) leaves against Staphylococcus aureus, Escherichia coli and Clostridium perfringens. Methods: Through the water extraction method, the aqueous crude extract of neem leaves were obtained. Separate colonies of Staphylococcus aureus, Escherichia coli and Clostridium perfringens were isolated and identified on different agars. Agar cup diffusion method was done to test the antimicrobial susceptibility of the neem leaves crude extract against those bacteria on Mueller-Hinton agar. Susceptibility was determined based on the zone of inhibition formed on the agar of each bacterium culture. Result: Neem was effective against Staphylococcus aureus and Clostridium perfringens. It was not effective against Escherichia coli. Conclusion: Neem extract has some promisable antimicrobial effects against Staphylococcus aureus and Clostridium perfringens causative bacterial infections

ANTI-MICROBIAL EFFECTIVENESS OF LEMON GRASS OIL (CYMBOPOGAN CITRATE) AGAINST AEROBIC AND ANAEROBIC ORGANISMS

Objective: To find the antibacterial effectiveness of lemon grass (Cymbopogan citrate) oil against aerobic and anaerobic bacteria. Methods:This is an observational study conducted at Microbiology Clinical laboratory, Department of Microbiology, Saveetha Medical College and Hospital, Chennai. It was done over a period of 3 mo from January to March. The extracts of lemongrass leaves were investigated for its effectiveness against Staphylococcus aureus(S.aureus), Escherichia coli(E.coli) and Clostridium perfringens(C.perfringens) by Disc Diffusion assay. Results:Our study indicates that the extract of lemongrass oil shows antibacterial activity. Among the tested organisms, aerobic organisms were sensitive. Conclusion: This study thus provides insightful knowledge on antibacterial activity that would lead to further development of lemongrass oil for infectious diseases in the future

PREVALENCE AND ANTIBIOTIC SUSCEPTIBILITY PATTERN OF HIGH LEVEL AMINOGLYCOSIDE RESISTANCE AMONG GRAM POSITIVE ORGANISMS IN A TERTIARY CARE CENTRE

Objective: The study is done to determine the prevalence and the antimicrobial susceptibility against the gram positive organisms with high level amino glycosides resistance. Methods: This is a prospective study involving the analysis of clinical samples for gram positive organisms like Streptococcus species, Enterococcus species and Staphylococcus species and determining their antimicrobial susceptibility pattern. Results: From the collected clinical samples, all the gram positive organisms show resistance to gentamicin. Most of the Staphylococcus species showed a wide resistance to erythromycin followed by ceftrioxazone and many Enterococcus species shows resistance to penicillin, erythromycin, ciprofloxacin. Conclusion: The high level aminoglycoside resistant (HLAR) gram positive organisms showed susceptibility to few drugs that are prevalent in various clinical samples. Surveillance of antimicrobial resistance and sensitivity is essential in managing and control of infection

Punigratane, a novel pyrrolidine alkaloid from <i>Punica granatum</i> rind with putative efflux inhibition activity

<p>A new pyrrolidine alkaloid named Punigratane was isolated from the rind of <i>Punica granatum.</i> This is the first report of a pyrrolidine-like structure from the rind. The activity of this compound was tested in a representative MDR <i>Klebsiella pneumoniae</i> strain which exhibited high efflux pump activity. At a concentration of 6 mg, this compound Punigratane was found to have efflux inhibition activity.</p