Prevalence of Methicillin Resistant Staphylococcus aureus Nasal Colonizers among Basic Science MBBS and BDS Students of Kathmandu Medical College.

INTRODUCTION: Methicillin-Resistant Staphylococcus aureus exhibit multiple drug resistance phenotypes. Colonizers harboring Methicillin-Resistant Staphylococcus aureus are often associated with its outbreaks in both hospital and community settings. This study was done to determine the prevalence of nasal carriage rate of Methicillin-Resistant Staphylococcus aureus among basic science MBBS and BDS students of Kathmandu Medical College. METHODS: A descriptive cross-sectional study was done in Kathmandu Medical College from March 5 to June 5 2020. Ethical clearance was obtained from the Institutional Review Committee with reference no. 040320201. A convenient sampling method was used, and the sample size was calculated with a prevalence of 50%. Two hundred students studying MBBS and BDS were enrolled. The nasal swab was collected and processed using standard microbiological methods. The data obtained were computed and analyzed using Statistical Package for Social Sciences 16.0 Version. RESULTS: Among 200 participants, 9 (4.5%) were found to be nasal carriers of Methicillin-Resistant Staphylococcus aureus. CONCLUSIONS: Colonization of anterior nares by Methicillin-Resistant Staphylococcus aureus in apparently healthy individuals is a cause of concern. Education regarding Methicillin-Resistant Staphylococcus aureus, its carrier and significance, and its screening must be included early on in MBBS and BDS.

Prevalence of Intestinal Parasitic Infestation among Public School Children of a Community.

INTRODUCTION: Intestinal parasitic infestation is one of the major health problems in developing countries like Nepal. This study was done to determine the prevalence rate of intestinal parasitic infestation among school children in Duwakot VDC, Bhaktapur, Nepal. METHODS: A descriptive cross-sectional study was done in 194 public school children of Duwakot village development committee from August to October, 2019. Ethical clearance was obtained from the Institutional Review Committee (reference no. 1207201915). Simple random sampling was done. One hundred and ninety-four public school children individuals of 6 to 14 years of age were enrolled. Collected stools were examined for the presence of parasites macroscopically and microscopically. Microscopic examination was carried out by direct wet mount using normal saline (0.9%) and Lugol's iodine (0.5%) mount. The data obtained were computed and analyzed using Statistical Package for the Social Sciences version 16.0. RESULTS: A total of 194 stool samples were collected from school children and examined. The prevalence of intestinal parasitosis was 26 (13.40%). The commonest organism was Giardia lamblia in 22 (11.34%) cases. Among helminthic infection, 2 (1.03%) cases each were infected by Hymenolepis nana and Hookworm respectively. CONCLUSIONS: The prevalence rate of intestinal parasite infestation in Nepal shows considerable decline in recent years. However, more effort is required by public health resources to minimize the problem further.

Prevalence of Pseudomonas Aeruginosa and its Antibiotic Sensitivity Pattern.

BACKGROUND: Pseudomonas aeruginosa is an opportunistic pathogen which causes most of the chronic infection in humans. This study was undertaken to determine the prevalence rate of Pseudomonas aeruginosa that is isolated from various clinical specimens along with its antibiotic susceptibility pattern. METHODS: This descriptive cross sectional study was conducted in Kathmandu Medical College and Teaching Hospital (KMCTH) from February to May 2018. Pseudomonas aeruginosa isolated from various clinical specimens were processed in clinical laboratory, Department of Microbiology, KMCTH. Isolation, identification and sensitivity of Pseudomonas aeruginosa to antibiotics were measured. RESULTS: A total of 7527 samples were been processed of which 46 isolates of Pseudomonas aeruginosa were obtained. Pseudomonas aeruginosa was isolated mainly from Pus, Wound swab, Sputum and Tracheal aspirate. Here 63.04% Pseudomonas aeruginosa isolates were resistant to Ceftazidime, 65.21% to Cefixime, 56.52% to Ceftriaxone and Cefotaxime followed by 56.52% to Piperacillin. Furthermore, the current study reveals antibiotics like Imipenem, Meropenem, Piperacillin/Tazobactam, Ciprofloxacin, Gentamicin, Amikacin and Tobramycin were found to be good choice for the treatment of infection caused by this organism. CONCLUSIONS: Continuous monitoring of antibiotic susceptibility pattern of Pseudomonas aeruginosa is essential and rational treatment regimens prescription by the clinicians is required to limit the spread of antimicrobial resistance.

Dermatophytes in Skin, Nail and Hair among the Patients Attending Out Patient Department.

BACKGROUND: Dermatophytosis are the most common types of cutaneous fungal infection seen in human and animals affecting skin, hair and nails caused by dermatophytes. The diagnosis of dermatophytes is based on the clinical observation and laboratory diagnosis by direct microscopic examination and fungal cultures. The present study is undertaken to isolate different type of dermatophytes causing fungal infection. METHODS: A prospective cross-sectional study design was used in a total of 90 clinically suspected cases of dermatophytic infection attending the out patient department of Kathmandu Medical College and Teaching hospital (KMCTH). Skin scraping, hair and nail samples were collected from the patients and were processed by direct microscopy and culture using standard protocol. Dermatophytes were identified based on the microscopic arrangement of microconidia and macroconidia. RESULTS: Dermatophytosis was more common in the age group of 21-40 years and was more predominant among male with male to female ratio of 1.7: 1. Among the total clinically suspected cases of dermatophytosis, 53 were positive in direct microscopy and only a total of 20 were positive by culture. Most common clinical type observed in our study was Tinea corporis(25%) followed by Tinea cruris. Trichophyton rubrum(50%) was the commonest aetiological agent in majority of clinical types followed by Trychophyton mentagrophytes(35%). CONCLUSIONS: The study highlighted T. corporis followed by T. cruris and T. unguim as the most common clinical pattern of dermatophytosis with a male predominance and 21-40 years being the most affected age group. T. rubram was the most common aetiological agent causing dermatophytosis.

Prevalence of Staphylococcus aureus Isolated from Clinical Samples in a Tertiary Care Hospital: A Descriptive Cross-sectional Study.

INTRODUCTION: Staphylococcus aureus is one of the commonest cause of nosocomial infections. Resistant Staphylococcus aureus strain has become a matter of concern. This study was done to find out the prevalence of Staphylococcus aureus from different clinical samples. METHODS: The descriptive cross-sectional study was carried out in the Clinical Microbiology laboratory from January 2019 to June 2019. Ethical approval was received from the Institutional Review Committee (Ref: 28122018010). Six hundred sixty-six sample size was calculated. Convenient sampling was done. Staphylococcus aureus was identified on the basis of its microscopy and morphological characteristics followed by catalase and coagulase test. Antibiotic sensitivity test of misolated pathogens was done using Muller Hinton Agar by Kirby-Bauer method. Statistical analysis was done by Excel 2018, point estimate at 95% confidence interval was calculated along with frequency and proportion for binary data. RESULTS: Out of the 666 bacteria isolated from clinical specimens, 133 (19.96%) were Staphylococcus aureus at 95% confidence interval (12.91-13.60%). Seventy nine (78.95%) of which is isolated from pus and wound infections. Out of 133 Staphylococcus aureus, 94 (70.64%) were Methicillin-Resistant Staphylococcus aureus. CONCLUSIONS: This study provides valuable information regarding the high prevalence of Staphylococcus aureus from pus and wound infections. The alarming number of Methicillin-Resistant Staphylococcus aureus is worrisome finding. Antibiotics like Vancomycin and Linezolid which has not developed resistance should be cautiously used only in Methicillin-Resistant Staphylococcus aureus cases.

Biofilm Formation and Extended-Spectrum Beta-Lactamase Producer among Acinetobacter Species Isolated in a Tertiary Care Hospital: A Descriptive Cross-sectional Study.

INTRODUCTION: Acinetobacter species are short, stout, gram-negative coccobacilli, generally considered to be a relatively low-grade pathogen. However, its resistance towards multiple classes of antibiotics through an array of resistance mechanisms including its ability to form biofilm has led to its emergence as an important pathogen in hospital settings. This study was done to determine the prevalence of biofilm former and Extended-spectrum Beta-Lactamase producer among Acinetobacter species. METHODS: A descriptive cross-sectional study was done in the clinical microbiology laboratory, Kathmandu Medical College from January to June 2019. Convenient sampling method was used. Ethical approval was taken from the Institutional Review Committee, Ref no. 2812201805. Preliminary identification followed by characterization of Acinetobacter species was done. Antibiotic susceptibility test was done using the Kirby-Bauer method following Clinical and Laboratory Standards Institute guidelines. Extended-spectrum Beta-Lactamase was detected by combined disc method and Biofilm detection was done using congo red agar method. Statistical Package for Social Sciences 16.0 version statistical software package was used for statistical analysis. Point estimate at 95% Confidence Interval was calculated along with frequencyand proportion for binarydata. RESULTS: Among 108 Acinetobacter species, 86 (79.7%) Acinetobacter calcoaceticus-A. baumannii complex was seen. Seventy-eight (72%) of the isolates were multidrug-resistant, 34 (31%) of the isolates were Extended-spectrum Beta-Lactamase producer and only 10 (9.3%) of the isolates, were biofilm producers. CONCLUSIONS: Multidrug-resistant Acinetobacter spp. with the ability to produce Extended-spectrum Beta-Lactamase is prevalent in our hospital settings. Strict compliance with infection control practices is necessary to curb its spread.

Resistance Pattern of Carbapenem on Enterobacteriaceae.

INTRODUCTION: Gram negative bacilli are the important causes of common clinical infections. Carbapenem resistant Enterobacteriaceae are considered as important public health threat and is classified as urgent by the Centers of Disease Control and Prevention because of their progressive geographic dissemination and limited therapeutic alternatives. This study was done to find out the resistance pattern of Carbapenem among Enterobacteriaceae. METHODS: The descriptive cross-sectional study was carried out in Clinical Microbiology laboratory from February 2018 to May 2018 after ethical approval. Organism was identified on the basis of its microscopic observation by performing Gram's stain and by identification of morphology after its growth in culture media followed by its biochemical reactions. Antibiotic sensitivity test of isolated pathogens was done using Muller Hinton Agar by the standard disk diffusion technique of Kirby-Bauer method. RESULTS: In our study, total 1055 sample belongs to the family Enterobacteriaceae. From the family Enterobactericeae, 348 (27%) of the bacilli were found to be Carbapenem resistant. Among which most common bacteria was Klebsiella pneumoniae followed by Escherichia coli. All strains of Carbapenem resistant Enterobacteriaceae were sensitive to Colistin, Polymyxin B and Tigecycline. CONCLUSIONS: Among Enterobacteriaceae, around one-third of the bacterial isolates were Carbapenem resistant. However, to reduce drug resistance antimicrobial stewardship programme and proper infection control measures is required.