scholarly journals Bacterial Contaminants on Exposed Surfaces and Their Antibiotic Sensitivity Patterns at the Benjamin Mkapa Hospital, Dodoma-Tanzania

2021 ◽  
pp. 1-11
Author(s):  
Alphonce B. Chandika ◽  
Reuben S. Mkala ◽  
Bushi Lugoba ◽  
Benjamin C. Kipilipili ◽  
Witness Saitot ◽  
...  
Keyword(s):  
Pathogenic Bacteria ◽  
Antimicrobial Agents ◽  
Antibiotic Sensitivity ◽  
Surgical Site Infections ◽  
Healthcare Services ◽  
Control Measures ◽  
Hospital Environment ◽  
Infection Prevention And Control ◽  
Bacterial Isolates ◽  
Wide Range

Background: Hospital acquired infection pose a great challenge in provision of healthcare services to many settings  particulary in developing countries where there is limited availability of resources. The roles played by exposed surfaces in spreading of potential bacterial pathogens within the hospital environment have certainly contributed to the increased burden of bacterial infectious diseases such as morbidness, death as well as cost imolecation in healthcare. Our study aimed to determine common bacteria isolated on exposed surfaces and the antimicrobial sensitivity patterns. Methods: A sum of 516 specimens gathered and enrolled for study at Benjamin Mkapa Hopsital (BMH).  The swab specimens were continuously gathered (collected) from different exposed objects in hospital environmental surfaces. All microbiological procedures or tests were performed using appropriate standard operating procedure. The obtained data were analysed using SPSS version 16.0. Results: Among 516 samples, 317 (61.4%) were positive with variety of bacterial isolates from different sites. Out of 317 positive cultures, 120 (37.9%) Staphylococcus aureus, 97 (30.6%) E. coli, 28 (8.8%) Enterobacter aerogenes, 25 (7.9%) Pseudomonas aeruginosa, 23 (7.3%) other Citrobacter species, 20 (6.3%) Citrobacter freundii, 3 (0.9%) Morganella morganii and 1 (0.3%) Serratia mercesens were isolated from different source of exposed surfaces at BMH. Serratia mercesens were highly (100%) resistant to most of the antimicrobial agents including erythromycin, cefotaxime, ciprofloxacin, gentamicin, amikacin, penicillin,ceftriaxone, ceftazidime, levofloxacin, ampicillin, azithromycin and cotrimoxazoleTrimethoprim/sulfamethoxazole. Conclusion: High levels of potentially pathogenic bacteria were isolated in swab specimens from a wide range of exposed surfaces at BMH. Variable pattern of antiobiotic resistance were observed among bacterial isolates with alarming levels demonstrated by isolates of Serratia mercesens which is amongst the common causes of surgical site infections. This findings call for improved actions for infection prevention and control measures at BMH.

Isolation and characterization of Hena1 – a novel Erwinia amylovora bacteriophage

2020 ◽  
Vol 367 (9) ◽  
Author(s):  
Natalya V Besarab ◽  
Artur E Akhremchuk ◽  
Maryna A Zlatohurska ◽  
Liudmyla V Romaniuk ◽  
Leonid N Valentovich ◽  
...  
Keyword(s):  
Pathogenic Bacteria ◽  
Fire Blight ◽  
Antimicrobial Agents ◽  
Erwinia Amylovora ◽  
Gc Content ◽  
Control Measures ◽  
Effective Control ◽  
Lytic Phage ◽  
Trna Genes ◽  
Isolation And Characterization

ABSTRACT Fire blight, caused by plant pathogenic bacterium Erwinia amylovora, is one of the most important diseases of Rosaceae plants. Due to the lack of effective control measures, fire blight infections pose a recurrent threat on agricultural production worldwide. Recently, bacterial viruses, or bacteriophages, have been proposed as environmentally friendly natural antimicrobial agents for fire blight control. Here, we isolated a novel bacteriophage Hena1 with activity against E. amylovora. Further analysis revealed that Hena1 is a narrow-host-range lytic phage belonging to Myoviridae family. Its genome consists of a linear 148,842 bp dsDNA (48.42% GC content) encoding 240 ORFs and 23 tRNA genes. Based on virion structure and genomic composition, Hena1 was classified as a new species of bacteriophage subfamily Vequintavirinae. The comprehensive analysis of Hena1 genome may provide further insights into evolution of bacteriophages infecting plant pathogenic bacteria.

scholarly journals Vancomycin and High Level Aminoglycoside Resistance inEnterococcusspp. in a Tertiary Health Care Centre: A Therapeutic Concern

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Seema Mittal ◽  
Pooja Singla ◽  
Antariksha Deep ◽  
Kiran Bala ◽  
Rama Sikka ◽  
...  
Keyword(s):  
Antimicrobial Agents ◽  
Antibiotic Sensitivity ◽  
Vaginal Swab ◽  
Control Measures ◽  
Diffusion Method ◽  
Clinical Samples ◽  
Aminoglycoside Resistance ◽  
Sensitivity Testing ◽  
Health Care Centre ◽  
High Level

Aims. This study was aimed at knowing the prevalence of vancomycin and high level aminoglycoside resistance in enterococcal strains among clinical samples.Study Design. It was an investigational study.Place and Duration of Study. It was conducted on 100Enterococcusisolates, in the Department of Microbiology, Pt. BDS PGIMS, Rohtak, over a period of six months from July to December 2014.Methodology. Clinical specimens including urine, pus, blood, semen, vaginal swab, and throat swab were processed andEnterococcusisolates were identified by standard protocols. Antibiotic sensitivity testing of enterococci was performed using Kirby-Bauer disc diffusion method.Results. High level gentamicin resistance (HLGR) was more common in urine samples (41.5%) followed by blood (36%) samples. High level streptomycin resistance (HLSR) was more common in pus samples (52.6%) followed by blood samples (36%). Resistance to vancomycin was maximum in blood isolates.Conclusion. Enterococci resistant to multiple antimicrobial agents have been recognized. Thus, it is crucial for laboratories to provide accurate antimicrobial resistance patterns for enterococci so that effective therapy and infection control measures can be initiated.

scholarly journals ChoK-ing the Pathogenic Bacteria: Potential of Human Choline Kinase Inhibitors as Antimicrobial Agents

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Moad Khalifa ◽  
Ling Ling Few ◽  
Wei Cun See Too
Keyword(s):  
Cell Wall ◽  
Targeted Delivery ◽  
Pathogenic Bacteria ◽  
Antimicrobial Agents ◽  
Kinase Inhibitors ◽  
Amino Acid Sequences ◽  
Choline Kinase ◽  
Anticancer Properties ◽  
Wide Range ◽  
Catalytic Sites

Novel antimicrobial agents are crucial to combat antibiotic resistance in pathogenic bacteria. Choline kinase (ChoK) in bacteria catalyzes the synthesis of phosphorylcholine, which is subsequently incorporated into the cell wall or outer membrane. In certain species of bacteria, phosphorylcholine is also used to synthesize membrane phosphatidylcholine. Numerous human ChoK inhibitors (ChoKIs) have been synthesized and tested for anticancer properties. Inhibition of S. pneumoniae ChoK by human ChoKIs showed a promising effect by distorting the cell wall and retarded the growth of this pathogen. Comparison of amino acid sequences at the catalytic sites of putative choline kinases from pathogenic bacteria and human enzymes revealed striking sequence conservation that supports the potential application of currently available ChoKIs for inhibiting bacterial enzymes. We also propose the combined use of ChoKIs and nanoparticles for targeted delivery to the pathogen while shielding the human host from any possible side effects of the inhibitors. More research should focus on the verification of putative bacterial ChoK activities and the characterization of ChoKIs with active enzymes. In conclusion, the presence of ChoK in a wide range of pathogenic bacteria and the distinct function of this enzyme has made it an attractive drug target. This review highlighted the possibility of “choking” bacterial ChoKs by using human ChoKIs.

Spectrum and resistance determinants of oral streptococci clinical isolates

2020 ◽  
Vol 65 (10) ◽  
pp. 632-637
Author(s):  
Nataliia Valerievna Davidovich ◽  
A. S. Galieva ◽  
N. G. Davydova ◽  
O. G. Malygina ◽  
N. N. Kukalevskaya ◽  
...  
Keyword(s):  
Antimicrobial Agents ◽  
Multiple Drug Resistance ◽  
Antibiotic Sensitivity ◽  
Periodontal Pocket ◽  
Multiple Drug ◽  
Oral Streptococci ◽  
Antibiotic Resistant ◽  
Resistance Determinants ◽  
Wide Range ◽  
Clinically Significant

The profiles of oral streptococci sensitivity to antibacterial drugs may reflect information about the presence of macroorganism resistance determinants. The aim of the work was to isolate the spectrum of oral streptococci from the microbiota of the oral cavity of patients and to determine their sensitivity to a wide range of antibiotics. A total of 342 microbial streptococcal isolates were isolated from saliva samples and a periodontal pocket and tested for antibiotic sensitivity. Species identification of streptococci was carried out using biochemical API test systems. Evaluation of antibiotic resistance was performed using E-tests. Real-time PCR was used to identify the presence of tetracycline and macrolide resistance genes. The study identified six types of oral streptococci: S. oralis, S. salivarius, S. mitis, S. sanguinis, S. anginosus and S. mutans. All streptococci were sensitive to linezolid and meropenem. The proportion of penicillin-resistant streptococci in the subgroup S. oralis / mitis / mutans was 47,8% versus 23,5% in the subgroup S. salivarius / sanguinis / anginosus (p = 0.020). Significant levels of resistance were revealed to macrolides (erythromycin) - 47,9%, tetracyclines (tetracycline) - 44,4% and quinolones (ofloxacin) - 41%. Multiple drug resistance (MDR) was detected in 31,9% of oral streptococcal isolates, a combination of erythromycin, tetracycline and ofloxacin resistance was prevalent in 79 isolates (23,1%). The most common genotypes of macrolides and tetracycline resistant oral streptococci (in 127 streptococcal isolates with combined resistance) were ermB-mefE + and tetM + tetQ-, respectively. Thus, S. oralis / mitis / mutans group streptococci predominated in the structure of antibiotic-resistant oral streptococci, including MDR. So, being in one of the most densely populated biotopes of a macroorganism, oral streptococci can mediate the transfer of resistance determinants to more pathogenic and clinically significant microorganisms, which requires careful monitoring of their level of susceptibility to antimicrobial agents.

Surgical Site Infections in a Rural Teaching Hospital of North India

2017 ◽  
Vol 2 (1) ◽  
pp. 11-16
Author(s):  
Rajesh Abbey ◽  
Manjul Mohan ◽  
Nitin Malik ◽  
Rohit Tiwari ◽  
Shashank Nahar
Keyword(s):  
Hospital Stay ◽  
Teaching Hospital ◽  
Tertiary Care ◽  
Antibiotic Sensitivity ◽  
Uttar Pradesh ◽  
Surgical Site Infections ◽  
Control Measures ◽  
North India ◽  
Duration Of Surgery ◽  
Rural Teaching

ABSTRACT Aims and objectives Surgical site infections (SSIs) are one of the most important causes of health care-associated infections. Understanding SSI reduces the social and economic burden of a hospital and society. In this context, we evaluated the various aspects of SSI in our institution, Rohilkhand Medical College & Hospital (RMCH), which is a tertiary care teaching hospital in rural Uttar Pradesh in North India. Materials and methods This prospective study was conducted in the Department of General Surgery, RMCH, Bareilly, Uttar Pradesh, India. A total number of 1,498 patients admitted for surgical procedures with effect from November 1, 2016 to December 31, 2016, formed the subjects of the present study. All operated cases during the above period, including major and minor, emergency and elective, laparoscopic and open procedures were included in the present study. Data so obtained were analyzed statistically. The Centers for Disease Control and Prevention, USA criteria were used for defining the wound. Sample swabs were collected from the first dressing and up to 2 to 4 weeks postoperatively. Samples were processed for aerobic and anaerobic flora, and the antibiotic sensitivity of the isolates was also performed. Results and discussion The SSI rate in the present study was 8.67%. Significantly higher incidence of SSI was detected with increasing age. The SSI rate in case of emergency surgeries was more (27.7%) as compared with routine/elective surgeries (6.3%). The higher incidence (18.75%) of SSI was detected in patients having preoperative hospital stay of more than 7 days, and the maximum incidence (15.7%) was observed in patients having longer postoperative hospital stay of more than 10 days. Dirty wounds had the highest incidence of SSI (53.45%). The incidence of SSI increased with duration of surgery, order of surgery, and with the increasing duration of postoperative drains. Staphylococcus aureus was the commonest isolate (32.30%) followed by Escherichia coli (39%). Conclusion Though the incidence of SSI in the present study was slightly low as compared with similar reports from other institutions of the country, more rational antibiotic policy and more stringent infection control measures are needed. How to cite this article Abbey RK, Mohan M, Malik N, Tiwari R, Nahar S. Surgical Site Infections in a Rural Teaching Hospital of North India. Int J Adv Integ Med Sci 2017;2(1):11-16.

scholarly journals Carcass Salmonella and Its Drug Resistance

2019 ◽  
pp. 1-21
Author(s):  
Gizachew Muluneh Amera ◽  
Amit Kumar Singh
Keyword(s):  
Public Health ◽  
Antimicrobial Resistance ◽  
Pathogenic Bacteria ◽  
Antimicrobial Agents ◽  
Public Health Problem ◽  
Multidrug Resistant ◽  
Health Concern ◽  
Personal Hygiene ◽  
Wide Range ◽  
Food Animals

Salmonella are the major pathogenic bacteria in humans as well as in animals. Salmonella species are leading causes of acute gastroenteritis in several countries and salmonellosis remains an important public health problem worldwide, particularly in the developing countries. Isolation of Salmonella from a wide range of sources suggests that Salmonella is widespread in food animals and meat products and underlines the necessity for a joint and coordinated surveillance and monitoring programs for salmonellosis and other major food borne zoonotic diseases. Food animals harbor a wide range of Salmonella and so act as sources of contamination, which is of paramount epidemiological importance in non-typhoid human salmonellosis. Salmonellosis is more aggravated by the ever increasing rate of antimicrobial resistance strains in food animals. The high prevalence and dissemination of multidrug resistant (MDR) Salmonella have become a growing public health concern. Multidrug resistant (MDR) strains of Salmonella are now encountered frequently and the rates of multidrug resistance have increased considerably in recent years. Food animal consumption is a potential cause for antimicrobial resistant Salmonella illnesses besides, the common factors such as overcrowding, poverty, inadequate sanitary conditions, and poor personal hygiene. Practicing good sanitary measures, extensive education programs for proper hygiene and improvement of managements are solutions to eliminate the high bacteriological load as well as prevalence of Salmonella in cattle carcass. Furthermore, restricting the use of antimicrobial agents in food animals, designation of multidrug-resistant Salmonella as an adulterant in ground beef, improving the mechanisms for product trace-back investigations and wise and discriminate use of antimicrobials should be practiced to combat the ever increasing situation of antimicrobial resistance. So, this review used for updating information on their prevalence and resistance patterns is very important to suggest the acceptance of the carcass in relation to the standards and for proper selection and use of antimicrobial agents in a setting.

scholarly journals Controlling bacteriological contamination of environmental surfaces at the biological isolation and containment unit of a veterinary teaching hospital

2021 ◽  
Vol 74 (1) ◽  
Author(s):  
C. Verdial ◽  
C. Carneiro ◽  
I. Machado ◽  
L. Tavares ◽  
V. Almeida ◽  
...  
Keyword(s):  
Teaching Hospital ◽  
Bacterial Load ◽  
Generation Cephalosporin ◽  
Control Measures ◽  
Hospital Environment ◽  
Infection Prevention And Control ◽  
Infectious Agents ◽  
Risk Environment ◽  
Selective Media ◽  
Environmental Surfaces

Abstract Background The Biological Isolation and Containment Unit (BICU) is a subunit of the Teaching Hospital of the Faculty of Veterinary Medicine of the University of Lisbon, Portugal, for the admission of animals with confirmed infectious diseases or under clinical suspicion and waiting for a diagnosis. As a high-risk environment for the transmission of infectious agents, it is extremely important to implement programs for the surveillance of nosocomial microorganisms in these facilities. The purpose of this study was to evaluate the level of bacterial contamination of the BICU environmental surfaces and to implement corrective actions on disinfection protocols. Swab samples were collected from selected environmental surfaces in 3 different areas of the BICU (isolation, work, and preparatory rooms) to evaluate the total aerobic bacterial load and investigate the presence of 4 nosocomial microorganisms: vancomycin-resistant Enterococcus spp., methicillin-resistant Staphylococcus aureus, 3rd-generation cephalosporin-resistant Escherichia coli, and carbapenem-resistant Pseudomonas aeruginosa. Bacterial quantification was performed by using non-selective media, while specific selective media were used for the isolation of the target microorganisms. Isolates were identified based on their macro and microscopic characteristics and their biochemical profile. Subsequently, new disinfection protocols were implemented, and their effectiveness evaluated. Results The surfaces with the highest bacterial load in the isolation, preparatory, and worker’s rooms were the cages, hand-held sponge, and telephone, respectively. Regarding the 4 pathogens investigated, Enterococcus spp. were the most frequently isolated (11.3%), followed by E. coli (1.5%) and P. aeruginosa (1.5%). One of the P. aeruginosa isolates obtained was resistant to imipenem. In the end, new disinfection protocols were implemented, which proved to be effective in reducing bacterial counts by 99.99% in cages and the sponge, and by 90 to 99% on the telephone. Conclusions This study allows to conclude that the cages and the human contact surfaces were the most contaminated in the isolation rooms. Nevertheless, the new disinfection strategies seemed to be effective in reducing environmental contamination, including by some potentially nosocomial agents, although more samples must be analyzed for definitive conclusions. These results may contribute to highlight the importance of infection prevention and control measures, as fundamental tools to reduce the spread of infectious agents in the hospital environment.

Novel Natural Disinfectants for Contaminated Cosmetic Application Tools

2018 ◽  
Vol 1 (1) ◽  
pp. 23-30
Author(s):  
Amera Alrawi ◽  
Shababa Bahjet ◽  
May AL-Allaf
Keyword(s):  
Antimicrobial Activity ◽  
Pathogenic Bacteria ◽  
Antimicrobial Agents ◽  
Low Cost ◽  
Potassium Sulfate ◽  
Bacterial Isolates ◽  
Agent Based ◽  
Bacterial Contaminants ◽  
Microbial Analysis ◽  
First Time

  Background: Makeup can get contaminated by inadequate preservative capacities, poor handling procedures during manufacturing and in use contamination. Makeup application tools like tweezers, scissors, and a variety of brushes and sponges are also a potential breeding ground for bacteria. Bacterial growth can occur when these tools are shared or used for a prolonged period of time without washing. Aim: The present study attempted to find a novel, effective, economic and easy to use natural disinfectants that can be effective in inhibiting bacterial contaminants from cosmetic application tools. Materials and Methods: A total of 35 multiuse tools (10 brushes and 15 face sponges) were collected from University Girls' Dormitory/ University of Mosul. Two concentrations (1,5, and 10%) of Aluminum potassium sulfate ( alum) and sodium bicarbonate ( baking soda) were evaluated for the first time for antimicrobial activity. Results: Microbial analysis showed that brushes harbored more bacterial contamination than sponges. The most prevalent pathogenic bacteria were found to belong to the genera Staphylococcus, Bacillus, Proteus, Klebsiella and other lactose and non-lactose fermenters. Results showed that both compounds were effective in inhibiting growth of all bacterial isolates over a 24 hr. treatment period especially at higher concentrations (10%). Conclusion: This study demonstrated the feasibility of alum used in debridement removing activity and a disinfecting agent based on antimicrobial activity against facultative anaerobic bacterial isolates which are best representing sponge and brush contaminants An advantage of NaHCO3 and alum over other antimicrobial agents is its safety, availability , ease and low cost.

Multidrug-resistant Pseudomonas aeruginosa isolated from ear and wound swabs in some selected hospital laboratories in Sokoto Metropolis, Nigeria

2020 ◽  
Vol 3 ◽  
pp. 31-35
Author(s):  
A. I. Umar ◽  
I. Garba ◽  
M. L. Jidda ◽  
A. M. Ganau ◽  
A. S. Fana ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Antimicrobial Agents ◽  
Opportunistic Infections ◽  
Antibiotic Sensitivity ◽  
Diffusion Method ◽  
Resistance Pattern ◽  
Multiple Drug ◽  
Drug Resistant ◽  
Sensitivity Testing ◽  
Wide Range

Objective: Pseudomonas aeruginosa is a metabolically versatile bacterium that can cause a wide range of severe opportunistic infections in patients with serious underlying conditions and can be found in most communities in Nigeria. The study was to determine the prevalence, resistance pattern and distribution of multiple drug resistant P. aeruginosa (MDR-PA) isolated from ear and wound specimens in patients attending Specialist Hospital Sokoto and Maryam Abacha Women and Children Hospital Sokoto. Materials and Methods: A total of 150 samples were analysed by standard bacteriological methods. Screening for MDR-PA was carried out by antibiotic sensitivity testing using disc diffusion method with ceftazidime (30 µg), ofloxacin (5 µg), cefuroxime (30 µg), cloxacillin (30 µg), amoxicillin (30 µg), ceftriaxone (30 µg), imipenem (10 µg), gentamycin (10 µg) and colistin (10 µg) discs on Mueller Hinton agar. Results: Of a total of 55 (36.7%) isolates of P. aeruginosa strains were obtained, 30 (54.5%) isolates were resistant to imipenem, 31 (56.3%) were resistant to ofloxacin, 44 (80.0%) to gentamycin, 53 (96.3%) to ceftazidime and cefuroxime, 50 (90.9%) to ceftrizone, 54 (98.1%) to cloxacillin and amoxycillin and lastly 15 (27.2%) to colistin. All the isolates were multi drug resistant, this probably due to improper use or over the counter purchase of antibiotics without professional oversight. Conclusion: Almost all the isolates were resistant to all the antibiotics used including colistin. There is need to improve on the public health awareness on the indiscriminate use of antimicrobial agents as it is one of the major ways microbes develop resistance to them.

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