Browsing by Author "Ibrahim, Y."

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    Antimicrobial Resistance Profile and Quinolone Resistance Genes in Staphylococcus aureus from Patients Attending Federal Medical Centre Keffi, Nigeria
    (Department Of Microbiology, Faculty Of Natural And Applied Sciences, Nasarawa State University, Keffi., 2020-05-20) Sunday, E.A.; Ngwai, Y.B.; Abimiku, R.H.; Nkene, I.H.; Ibrahim, Y.; Envuladu, E.Y.; Kigbu, S.K.
    Aims: This study investigated the antimicrobial resistance profile and quinolone resistance genes in Staphylococcus aureus from patients attending Federal Medical Centre, Keffi, Nigeria. Methodology: A total of 240 clinical samples which comprised of high vaginal swabs, endocervical swabs, sputum, ear swabs, wound swabs, semen and eye swabs, were collected from the patients. Staphylococcus aureus was isolated and identified from these samples using standard microbiological method. Antimicrobial susceptibility testing of the isolates was performed and interpreted in accordance with the Clinical and Laboratory Standards Institute (CLSI) method. Ciprofloxacin-resistant S. aureus were screened for quinolone resistance genes using Polymerase Chain Reaction (PCR) method
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    Molecular Characterization of Escherichia coli with Ciprofloxacin and Extended-Spectrum Cephalosporins Co-resistance from Patients Attending Tertiary Hospitals in Nasarawa State, Nigeria
    (Department of Microbiology, Nasarawa State University Keffi, 2020-05-13) Nkene, I.H.; Ngwai, Y.B.; Bassey, E.B.; Abimiku, R.H.; Ibrahim, T.; Ibrahim, Y.
    Antibiotic treatment of urinary tract infections caused by Escherichia coli remain the mainstay of its control. Molecular characterization of E. coli with ciprofloxacin and extended-spectrum cephalosporins co-resistance from patients attending tertiary hospitals in Nasarawa State, Nigeria was investigated. Thirty-five isolates, 13 from Dalhatu Araf Specialist Hospital Lafia (DASHL) and 22 from Federal Medical Centre, Keffi (FMCK), were obtained from previous studies. Phenotypic detection of extended spectrum beta-lactamase (ESBL) production was by double disc synergy test. Genes for ESBL and plasmid-mediated quinolones resistance (PMQR) were detected using polymerase chain reaction. Molecular diversity of the isolates was analyzed using Restriction Fragment Length Polymorphism (RFLP). Out of 35 isolates, 18 (54.5%) were ESBL producers, with higher occurrence in DASHL (54.5%) than FMCK (46.2%). The ESBL genes blaSHV, blaCTX-M and blaTEM were detected in both hospitals, with highest occurrence of 83.3% each for blaSHV and blaCTX-M in FMCK; and 66.7% for blaTEM in DASHL. The PMQR genes acc (6ʹ)-Ib-cr oqxAB, qnrB and qnrS were present in FCMK; but only qnrS was absent in DASHL. Occurrence of acc (6ʹ)-Ib-cr was highest (100.0%) in FMCK; while qnrB was highest (75.0%) in DASHL. The occurrence of strain A type isolates was higher in FMCK (100.0) than DASHL (83.33%), while no strain B type isolate in FCMK. The ESBL (blaSHV, blaCTX-M and blaTEM) and PMQR (acc (6ʹ)-Ib-cr oqxAB, qnrB and qnrS) genes were detected in the isolates. The most common circulating strain in both DASHL and FMCK was strain A, with no strain B in FCMK.
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    Molecular Detection of Plasmid-Mediated Quinolone Resistance in Ciprofloxacin-Resistant Escherichia coli from Urine of Patients attending Garki Hospital, Abuja, Nigeria
    (Department of Microbiology, Nasarawa State University Keffi, 2020-08-05) Eghieye,O.M.; Nkene, I.H.; Abimiku, R.H.; Ngwai, Y.B.; Ibrahim, Y.; Parom, S.K.
    Urinary tract infections (UTIs) caused by Escherichia coli (E. coli) is common worldwide; and its successful treatment using antibiotics is limited by acquisition of resistance by the bacteria. This study investigated the occurrence of plasmid-mediated quinolone resistance (PMQR) genes in ciprofloxacinresistant E. coli from urine of patients with suspected cases of UTIs attending Garki Hospital Abuja (GHA), Nigeria. A total of 8 confirmed ciprofloxacinresistant E. coli was screened for carriage of PMQR genes using polymerase chain reaction (PCR) method. The occurrences of the PMQR genes detected were in the order: aac-(6′)-Ib-cr (87.5%) > qnrB (50.0%) > qnrS (37.5%) > oqxAB (12.5%) > qnrA(0.0%). qnrB and qnrS did not exist alone, but in combination with other genes; aac-(6′)-Ib-cr existed both alone and in combination with others; themost prevalent patterns of existence were aac-(6′)- Ib-cr alone and aac-(6′)-Ib-cr + qnrB + qnrS at 25.0% each. This study has shown that the ciprofloxacin-resistant E. coli harbored aac-(6′)-Ib-cr, qnrB, qnrS and oqxAB PMQR genes, with aac-(6′)-Ib-cr being themost prevalent. The genes were present either alone or in combination with one another. This has implication for the clinical application of fluoroquinolones to treat UTI in the study location and environs.
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    Plasmid-mediated Quinolone Resistance Genes in Salmonella typhi from Patients Attending Selected General Hospitals in Abuja Municipal, Nigeria
    (Department Of Microbiology, Faculty Of Natural And Applied Sciences, Nasarawa State University, Keffi., 2020-05-20) Fasema, R.; Bassey, E.B.; Ngwai, Y.B.; Nkene, I.H.; Abimiku, R.H.; Parom, S.K.; Ibrahim, Y.
    This study investigated the antimicrobial resistance profile and presence of plasmid-mediated quinolone resistance (PMQR) genes in Salmonella typhi from patients attending selected general hospitals in Abuja municipal, Nigeria. Four hundred stool samples from patients with suspected typhoid fever were collected from Asokoro General Hospital Abuja (AGH), Garki Hospital Abuja (GHA), Maitama General Hospital Abuja (MGHA) and Wuse General Hospital Abuja (WGHA) and S. typhi was isolated and identified using standard microbiological methods. Antimicrobial susceptibility testing of the isolates was carried out using Clinical and Laboratory Standards Institute (CLSI) method. Molecular detection of PMQR genes in the ciprofloxacin-resistant isolates was carried out using Polymerase Chain Reaction (PCR) method. The overall occurrence of the isolates was 13.3% (53/400), with the highest hospital-related occurrence at WGHA (18.0%). The occurrence was highest at age 21-30yrs in AGHA (20.0%), GHA (33.3%) and WGHA (45.0%). The occurrence was higher in females at AGHA (12.7%) and GHA (16.0%); but higher in males at MGHA (11.4%) and WGHA (18.2%). Resistance to ciprofloxacin was the least at 30.2%, distributed as follows: AGHA (20.0%), GHA (35.7%), MGHA (36.4%) and WGHA (27.8%). The most common resistance phenotype was: NA-S-XT-AMC-TE-CRO-C-CN with overall occurrence of 9.4% (5/53) observed in AGH (10.0%), GHA (16.7%) and MGHA (18.2%) but not in WGHA. All (100%) isolates were multiple antibiotic resistance (MAR) isolates, with MAR indices above 0.2; and the commonest MAR index of 0.6 (30.0%) in AGHA, 0.8 (35.7%) in GHA; 0.8 (45.6%) in MGHA, and was 0.7 (38.9%) in WGHA. Multidrug resistance (MDR) was the commonest at 96.2% (51/53), with occurrences in the selected hospitals as follows: AGHA (90.0%), GHA (100.0%) and MGHA (100.0%) and WGHA (94.4%).The PMQR genes detected had overall frequency in the order: aac(6′)-Ib-cr (50.0%) >qnrB (37.5%) >qnrS (18.8%); qnrS was absent in AGHA and WGHA. The genes co-existed with one another with the qnrB+ aac(6′)-Ib-cr combination, present in isolates from all the hospitals, being the most common at (31.3%). Ciprofloxacin was the most effective antibiotic against the isolates; most isolates were MAR with prior exposure to antibiotics; most isolates were MDR and the ciprofloxacinresistant isolatesharbored qnrS, qnrB and aac(6′)-Ib-cr PMQR genes, with aac(6′)-Ib-cr being the most prevalent.