Online ISSN: 2515-8260

Keywords : Escherichia coli


Antibacterial effect of Swertia chirata against multi-drug resistant strains S. aureus and E. coli: in vivo and in vitro study

Bindu Sati, Sanjay Bhatt .

European Journal of Molecular & Clinical Medicine, 2022, Volume 9, Issue 3, Pages 1106-1115

Misuse and overuse of antibiotics results in widespread multi-drug resistance. The major cause of increased mortality and morbidity rates is Multi-drug resistance to antibiotics and it becomes a global heath challenges now a days, therefore it becomes a necessity and need for researchers to seek for alternative and natural sources of antimicrobials. In the present study an experimental trial (In-vitro and In-vivo) was undertaken to examine the antibacterial activity of extracts of Swertia chirata leaf against multi drug resistant (MDR) E.coli and S.aureus. Broth dilution test for MIC and Disc diffusion method for antimicrobial susceptibility test were applied to investigate Antibacterial activity of plant methanolic extracts. Twenty five albino mice weighted between 180-200g were used for bacterial inhibitory activity (In- Vivo). Plant extract showed broad spectrum of antibacterial activity against S.aureus in comparison to E.coli and showed MIC values of 20µg/ml. Swertia chirata plant extract contains lesser inhibition zone against E. coli (8.7±0.80) and showed highest zone of inhibition against S.aureus (16.2±0.60). It can be concluded that Swertia chirata plant extract was significantly better (P<0.05) against S.aureus than E. coli. The number of bacteria in treated groups was very low, These findings have cleared demonstrated that the clearance of bacteria from the blood of infected mice by sub-MIC of plant extract was significant. the findings of present study provide a suitable evidences for the use of a drug composed of plant extract as a new generation of drugs to attack the antibiotic resistance of bacteria.

ClinicalStudy ofBacteriologicalPatterns andAntibiotic Sensitivity in Secondary Peritonitis

Naveen Banoth, Venkatesh A

European Journal of Molecular & Clinical Medicine, 2022, Volume 9, Issue 3, Pages 2461-2472

Background:Intra-abdominal infections have been treated with various antibiotic regimens. These infections have been treated with single-agent and combination treatments. But no one therapy has been proven superior. The study's main goal is to examine the bacterial patterns in peritoneal fluid from surgical peritonitis patients and assess their antibiotic sensitivity and resistance.
Materials and Methods: It is a cross sectional observation research conducted in January 2020 to May 2021 which was conducted in JSS Hospital Mysuru. Analyzed data was in rates, proportions, and percentages. The sample includes 100 cases of secondary peritonitis caused by hollow viscus perforation, where preoperative peritoneal fluid samples were analysed for bacterial culture and sensitivity.
Results: Out of 100 samples, 50 had bacterial growth. The most common bacteria were E. coli. These were Acinobacter (6%), Candida (4%), Citrobacter (1%), Klebsiella (11%) and Serratia (2%). (4 percent). 77.5 percent of E. coli were sensitive to Ceftriaxone, 75% to Piperacillin-tazobactam, and 99.1 percent to Meropenem. In 40% of cases, E.coli was multidrug resistant. Most Klebsiellapneumoniae were responsive to ceftriaxone, piperacillin-tazobactam, and meropenem. Ciprofloxacin, Ceftriaxone, and Meropenem were all sensitive to Proteus mirabilis. 25.2 percent of cases were multidrug resistant bacteria.
Conclusion: The results of this investigation identify the organisms usually isolated from peritoneal fluid, their susceptibility and resistance to broad spectrum antibiotics. It shows the common gramme negative isolates and the current antibiotic resistance concern in these individuals. The most common microorganism found in gastrointestinal perforations is Escherichia coli. In most cases, numerous gramme negative bacilli develop polymicrobially. Antibiotic-resistant microorganisms, notably multidrug resistant Escherichia coli, are increasing in number. Third generation cephalosporins are becoming more resistant. In multidrug resistant organisms, Meropenem and Tigecycline seem to be the best options.

Escherichia coli Isolated from Horses and Study the Effect of the Peganum harmaline Extract In Vitro and In Vivo and Antibiofilm Effect In Vitro

Aseel Mohammed Hamzah

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 2, Pages 202-207

Out of a hundred horses, fecal samples Escherichia coli was isolated from 37 samples of
different ages, The isolated samples had been used to examine the effect of peganum
harmaline on isolated E.coli in vitro and in vivo.
The goal of this research was to determine the antimicrobial activity of peganum
harmaline extract by means of (ethanol: methanol 1:1) in opposition to Escherichia coli at
various 40,20, 10, 5, 2,5, 1,25 and 0,625 mg/ml concentrations in each plastic and glass
tube. The values of MIC (minimum inhibitory concentration) and MBC (minimum
bactericidal concentration) for the extract against E.coli were equal to (0.625 mg/ml) for
MIC and (10 mg/ml) for MBC on bacteria which cultured on glass tube while the MIC
value was 40 mg/ml and MBC was10 mg/ml on plastic tube. The effect of Peganum
harmaline on the formation of E.coli biofilm was investigated and the biofilm inhibitory
concentrations were 40-6.25mg / ml in vitro. In vivo, a group of laboratory mice used, the
LD50 of peganum harmaline extract was tested orally by up and down method and found
to be 1030 mg/kg body weight, the extract used as 103 mg/kg bodyweight treatment after
causing E.coli infection at 1×108 CFU/ml in laboratory mice the treated persist for two
weeks in group one and three weeks in the second group as well as three week treated in
the third group from the second days after infection while the control group left without
treated and the mice sacrificed after second, third and fifth days of infection. The result
shows histopathological changes in all treated groups, especially in the third group and
that refers to the antibacterial effect of the peganum harmaline ethanolic extract when
compared to the infected control group.