Sensitivity Pattern of Bacteria Isolated from Contact Lens Wearers in the Faculty of Pharmacy, Karachi University Student Population (original) (raw)
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International journal of research publications, 2022
Background: Pseudomonas aeruginosa have a significant proportion of the causes of bacterial keratitis. Corneal ulcers infected with P. aeruginosa are more severe than other bacterial corneal ulcers. P. aeruginosa is often associated with keratitis that results from wearing contact lenses, which eventually leads to corneal ulcers. This study aims to determine the differences in the results of the antibiotic sensitivity test of P. aeruginosa from corneal scraping specimens of keratitis patients using contact lenses and non-contact lens users at RSUD dr. Soetomo. Methods: This study is an observational analytic study of secondary data from corneal scraping cultures of patients with keratitis infected with P. aeruginosa at Dr. Soetomo Hospital period January 2017-December 2020. Results: The total number of samples included in the inclusion criteria was 46 samples. Of the total sample, 8 (17.40%) were contact lens users and 38 (82.60%) were non-contact lenses. The male sex and female sex each as much as 50%. The distribution of sample age categories for 0-20 years was 21.74%, 21-40 years was 13.04%, 41-60 years was 41.30%, and >60 years was 23.91%. Based on samples from 8 contact lens patients, antibiotics were found to be 100% sensitive, namely
The Egyptian Journal of Hospital Medicine, 2017
To evaluate the bacterial contamination associated with contact lenses and lens care solutions used by a group of soft contact lens (CL) users (daily & extended wear CL) and the susceptibility pattern of the isolated organisms to antibiotics for 12 months duration. METHODS: This prospective case controlled, non randomized study included 50 participants of contact lens (CL) wearers from Outpatient Clinics at Al-Azhar University Hospitals, International Eye Hospital New Damietta and available special clinics, (between 2013 and 2014). The sample population was divided into two groups: a Case group: 30 contact lens users (60 eyes) were suffering from symptoms and signs of conjunctivitis in one or both eyes; a Control group: 20 CL users were not suffering from conjunctivitis. Samples were taken from solution in contact lens storage cases; daily wear CL, extended wear CL, and conjunctiva were cultured on different media. Microbiological identification of the organisms and their antimicrobial susceptibility were done in accordance to standard protocols. RESULTS: In the case group, positive growth was found in 85% of the lens care solution, 65% of the contact lenses, and 56.7% of the conjunctiva of participants. While in the control group, it was found in 10% , 20% and 15% respectively, with a statistically significant difference between both groups (P<0.001). There was no statistically significant differences between the two usage schedules (daily wear and extended wear) regarding results of solution and contact lens cultures (p =0.599) and (p=0.694) respectively, but there was a significant higher growth in the conjunctival cultures of extended wear contact lenses (p =0.014). The isolated organisms in case group were; Staphylococcus epidermidis (36.3%), followed by Pseudomonas aeruginosa (34.7%), Staphylococcus aureus (15.3%), Anthracoid (5.6%), Escherichia coli (4.1%), Diphtheroid (1.6%), Non haemolytic streptreptococci (1.6 %) and least was found to be Mycoplasma (0.8%). Antibiotic susceptibility tests revealed that all isolates are sensitive to gatifloxacin, Impenem and ciprofloxacin which are commercially ophthalmological antibiotics. CONCLUSION: Prevention of bacterial contamination of contact lens can reduce the risk of developing ocular infections. Lens care practices amongst the participants were not optimum which resulted into high contamination level. Hence, creating awareness among the users about the lens care practices and regular cleaning and replacements of lens cases are required.
Status of the effectiveness of contact lens solutions against keratitis-causing pathogens
Contact lens & anterior eye : the journal of the British Contact Lens Association, 2015
The aim of this study was to assess the antimicrobial effects of marketed contact lens disinfecting solutions. Using ISO 14729 Stand-Alone Test for disinfecting solutions, bactericidal, fungicidal and amoebicidal assays of eight different contact lens solutions including: ReNu MultiPlus, DuraPlus, Ultimate Plus, OptiFree Express, Kontex Clean, Kontex Normal, Kontex Multisol extra(+), Kontex Soak were performed. The efficacy of contact lens solutions was determined against keratitis-causing microbes, namely: Pseudomonas aeruginosa, Serratia marcescens, Staphylococcus aureus, Methicillin-resistant Staphylococcus aureus, Fusarium solani and Acanthamoeba castellanii. The results revealed that ReNu MultiPlus, DuraPlus and OptiFree Express were effective in killing bacterial and fungal pathogens as per manufacturer's minimum recommended disinfection time. Ultimate Plus was effective against F. solani and MRSA but ineffective against P. aeruginosa, S. marcescens and S. aureus. Of conce...
Electronic Journal of University of Aden for Basic and Applied Sciences
Contact lenses (CLs) wearing has been increased globally during recent decades, which is one of the main risk factors for developing several ocular infections. Resistant CLs bacterial infections are mainly due to the CLs contamination by bacteria producing biofilm. This study was aimed to assessment of antibiotics resistance and biofilm production among bacterial species isolated from contact lenses in Mukalla city, Hadhramout, Yemen. This cross-sectional study was carried out on 298 participants women during a period from October 2022 to January 2023. The CLs swab samples were collected, then inoculated onto culture media and incubated aerobically at 37°C for 24 hrs. The bacterial isolates were identified by conventional bacteriological methods of cultural characteristics, Gram staining and biochemical test. Antibiotics susceptibility testing was performed by disc diffusion method. Bacterial biofilm production on CLs was detected by tube method (TM) and Congo red agar (CRA) method....
Keratitis Causing Micro-Organisms Isolated from Ophthalmic Contact Lens Solutions
2014
This study aimed to determine the disinfecting potential of some contact lens solution used by thestudents of Jinnah University for Women. We investigated the possible contaminating rate andidentified microbial contamination. 25 samples were collected in this study. Were used Multipurposedisinfecting solutions with protein remover of different companies. We have isolated 43 strains amongwhich 20 were Gram positive and 23 were Gram negative. S.aureus, Pseudomonas Serratia was mostcommon organisms isolated i.e. 26%, 16% & 14% respectively. All isolated strains were resistant toantibiotic used in this study except Bacillus which gives intermediate-resistant to streptomycin.
Eye & Contact Lens: Science & Clinical Practice, 2016
To study on antibiotic susceptibility and identify coagulasenegative Staphylococcus (CoNS) species based on tuf gene sequencing from keratitis followed by using soft contact lenses in Isfahan, Iran, 2013. Methods: This study examined 77 keratitis cases. The samples were cultured and the isolation of CoNS was done by phenotypic tests, and in vitro sensitivity testing was done by Kirby-Bauer disk diffusion susceptibility method. Results: Thirty-eight of isolates were conveniently identified as CoNS. In this study, 27 (71.1%), 21 (55.3%), and 16 (42.1%) were resistant to penicillin, erythromycin, and tetracycline, respectively. One hundred percent of isolates were sensitive to gentamicin, and 36 (94.7%) and 33 (86.8%) of isolates were sensitive to chloramphenicol and ciprofloxacin, respectively. Also, resistances to cefoxitin were 7 (18.4%). Analysis of tuf gene proved to be discriminative and sensitive in which all the isolates were identified with 99.0% similarity to reference strains, and Staphylococcus epidermidis had the highest prevalence among other species. Conclusions: Results of this study showed that CoNS are the most common agents causing contact lens-associated microbial keratitis, and the tuf gene sequencing analysis is a reliable method for distinguishing CoNS species. Also gentamycin, chloramphenicol, and ciprofloxacin are more effective than the other antibacterial agents against these types of bacteria.
Clinical Ophthalmology, 2019
BackgroundThe most common cause of ocular infections worldwide is bacteria; therefore, bacterial keratitis requires rapid and proper intervention because it is a major cause of loss of vision and ocular morbidity. Resistance studies have found increases in the resistance to ciprofloxacin, cefazolin, and gentamicin in bacterial keratitis cases that are caused by gram-positive organisms.AimTo identify the common predisposing factors, causative organisms, and antibiotic profile of bacterial keratitis (BK) in a tertiary care hospital in Riyadh, Saudi Arabia.MethodThis is a retrospective study of the microbiological record of all patients diagnosed with BK at KAUH. From the first of May 2015 until the first of January 2018. Demographic data, diabetes mellitus, contact lens use, history of eye trauma, ocular surface disorders, recent ocular surgeries, current and recent medications, initial and final visual acuity, and location and size of the infiltrate were all used in the study. VA was converted to the logarithm of the minimum angle of resolution (LogMAR) for statistical analysis.Results177 cases positive for BK were included. 100 (56.5%) were males, and 77 (43.5%) were females. The mean age was 43.15. Trauma was the most common predisposing factor, which was observed in 68 (38.4%) cases, followed by Ocular surface disease [52 (29.4%)]. Staphylococcus epidermidis was the most commonly isolated organism [61 (34.5%)], followed by Streptococcus pneumoniae [23 (13%)], and Staphylococcus aureus [18 (10.2%)]. All gram-positive cases were Vancomycin sensitive. Staphylococcus epidermidis showed only 4 resistant cases to chloramphenicol (7.27%), and resistance to penicillin and ampicillin was found in 55 (90%) and 53 (89.83%) cases, respectively. All Streptococcus pneumoniae cases were resistant to gentamicin (100%). Staphylococcus aureus showed high sensitivity for erythromycin [18 (100%)].ConclusionThe most common cause of bacterial keratitis was Staphylococcus epidermidis (N=61), followed by Streptococcus pneumoniae (N=23). Trauma was the most common predisposing factor (38.4%), while contact lens use was only identified in 14 cases (7.9%). All organisms tested were sensitive to vancomycin, and there was high resistance toward penicillin (90%).
Clinical Ophthalmology
Background: The most common cause of ocular infections worldwide is bacteria; therefore, bacterial keratitis requires rapid and proper intervention because it is a major cause of loss of vision and ocular morbidity. Resistance studies have found increases in the resistance to ciprofloxacin, cefazolin, and gentamicin in bacterial keratitis cases that are caused by gram-positive organisms. Aim: To identify the common predisposing factors, causative organisms, and antibiotic profile of bacterial keratitis (BK) in a tertiary care hospital in Riyadh, Saudi Arabia. Method: This is a retrospective study of the microbiological record of all patients diagnosed with BK at KAUH. From the first of May 2015 until the first of January 2018. Demographic data, diabetes mellitus, contact lens use, history of eye trauma, ocular surface disorders, recent ocular surgeries, current and recent medications, initial and final visual acuity, and location and size of the infiltrate were all used in the study. VA was converted to the logarithm of the minimum angle of resolution (LogMAR) for statistical analysis. Results: 177 cases positive for BK were included. 100 (56.5%) were males, and 77 (43.5%) were females. The mean age was 43.15. Trauma was the most common predisposing factor, which was observed in 68 (38.4%) cases, followed by Ocular surface disease [52 (29.4%)]. Staphylococcus epidermidis was the most commonly isolated organism [61 (34.5%)], followed by Streptococcus pneumoniae [23 (13%)], and Staphylococcus aureus [18 (10.2%)]. All gram-positive cases were Vancomycin sensitive. Staphylococcus epidermidis showed only 4 resistant cases to chloramphenicol (7.27%), and resistance to penicillin and ampicillin was found in 55 (90%) and 53 (89.83%) cases, respectively. All Streptococcus pneumoniae cases were resistant to gentamicin (100%). Staphylococcus aureus showed high sensitivity for erythromycin [18 (100%)]. Conclusion: The most common cause of bacterial keratitis was Staphylococcus epidermidis (N=61), followed by Streptococcus pneumoniae (N=23). Trauma was the most common predisposing factor (38.4%), while contact lens use was only identified in 14 cases (7.9%). All organisms tested were sensitive to vancomycin, and there was high resistance toward penicillin (90%).
Clinical Presentation and Microbial Analyses of Contact Lens Keratitis; an Epidemiologic Study
Introduction: Microbial keratitis is an infective process of the cornea with a potentially and serious visual impairments. Contact lenses are a major cause of microbial keratitis in the developed countries especially among young people. Therefore, the purpose of the present study was to evaluate the frequency and microbiological characteristic of CLK in patients referred to the emergency department (ED) of teaching hospitals, Babol, Iran. Methods: This is a cross-sectional study of all patients with contact lens induced corneal ulcers admitted to the teaching hospitals of Babol, Iran, from 2011- 2013. An ophthalmologist examined patients with the slit-lamp and clinical features of them were noted (including pain, redness, foreign body sensation, chemosis, epiphora, blurred vision, discomfort, photophobia, discharge, ocular redness and swelling). All suspected infectious corneal ulcers were scraped for microbial culture and two slides were prepared. Data were analyzed using SPSS software, version 18.0. Results: A total of 14 patients (17 eyes) were recruited into the study (100% female). The patients’ age ranged from 16-37 years old (mean age 21.58±7.23 years). The most prevalent observed clinical signs were pain and redness. Three samples reported as sterile. The most common isolated causative organism was pseudomonas aeroginosa (78.6%), Staphylococcus aureus 14.3%, and enterobacter 7.1%, respectively. Treatment outcome was excellent in 23.5%, good in 47.1%, and poor in 29.4% of cases. Conclusion: Improper lens wear and care as well as the lack of awareness about the importance of aftercare visits have been identified as potential risk factors for the corneal ulcer among contact lens wearers. Training and increasing the awareness of adequate lens care and disinfection practices, consulting with an ophthalmologist, and frequent replacement of contact lens storage cases would greatly help reducing the risk of microbial keratitis.
Trends in contact lens–associated microbial keratitis in Southern India
Ophthalmology, 2003
To review the microbiologic profile, clinical course, treatment, and outcome in patients with contact lens-associated microbial keratitis in the setting of a tertiary eye care center in a developing country in the Tropics. Design: Retrospective noncomparative case series selected from an ongoing prospective series. Participants: Twenty-eight subjects examined in the contact lens clinic of L. V. Prasad Eye Institute, Hyderabad, south India, between February 1991 and September 2000, who presented with corneal stromal infiltrate on slit-lamp examination, were included in the study. Intervention: All patients underwent standard diagnostic microbiologic evaluation and smear and cultureguided topical antimicrobial therapy. Penetrating keratoplasty was performed in some patients. Main Outcome Measures: Culture results and clinical response to antimicrobial therapy. Results: Twenty eight (0.11%) of 23,889 contact lens-wearing patients presented with laboratory-proven infectious keratitis; this constituted 0.56% of 4967 corneal ulcer patients seen during the same period. Most (15/28) of the patients wore soft contact lenses on a daily basis. Rigid gas-permeable lenses were worn by six patients, therapeutic bandage contact lenses by four, and Silsoft lenses by four. Laboratory results showed bacterial infections in 25 patients (89.2%); Pseudomonas was the most common organism (13/25; 52%). Acanthamoeba, herpes simplex virus, and Aspergillus niger were isolated in one case each. Laboratory-based medical therapy led to the healing of ulcers in 24 (85.7%) of 28 patients, whereas 4 patients required penetrating keratoplasty. Most of the organisms were sensitive to antibiotics. Conclusions: Contact lens-associated microbial keratitis is rare in southern India. Soft contact lens wear is the most common risk factor; Pseudomonas keratitis is the predominant causative agent. Fungal, viral, and Acanthamoeba keratitis are rare. The offending bacteria are usually sensitive to antibiotics, and the treatment outcome with medical therapy is good.