Jafar Khan

Jafar Khan

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Jafar Khan

Department of Microbiology, Kohat University of Science and Technology, Kohat, Khyber Pakhtunkhwa, 26000, Pakistan

Research Focus & Metrics

Academic Career Length

16Years (2011-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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12 March 2015 in BMC Complementary and Alternative Medicine
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Journal Article
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MAMuhammad Usman Amin
Muhammad Usman Amin
MKMuhammad Khurram
Muhammad Khurram
BKBaharullah Khattak
Baharullah Khattak
JKJafar Khan
Jafar Khan
To determine the effect of flavonoids in conjunction with antibiotics in methicillin resistant Staphylococcus aureus (MRSA) a study was designed. The flavonoids included Rutin, Morin, Qurecetin while antibiotics included ampicillin, amoxicillin, cefixime, ceftriaxone, vancomycin, methicillin, cephradine, erythromycin, imipenem, sulphamethoxazole/trimethoprim, ciprofloxacin and levolfloxacin. Test antibiotics were mostly found resistant with only Imipenem and Erythromycin found to be sensitive against 100 MRSA clinical isolates and S. aureus (ATCC 43300). The flavonoids were tested alone and also in different combinations with selected antibiotics. Antibiotics and flavonoids sensitivity assays were carried using disk diffusion method. The combinations found to be effective were sifted through MIC assays by broth macro dilution method. Exact MICs were determined using an incremental increase approach. Fractional inhibitory concentration indices (FICI) were determined to evaluate relationship between antibiotics and flavonoids is synergistic or additive. Potassium release was measured to determine the effect of antibiotic-flavonoids combinations on the cytoplasmic membrane of test bacteria. Antibiotic and flavonoids screening assays indicated activity of flavanoids against test bacteria. The inhibitory zones increased when test flavonoids were combined with antibiotics facing resistance. MICs of test antibiotics and flavonoids reduced when they were combined. Quercetin was the most effective flavonoid (MIC 260 μg/ml) while morin + rutin + quercetin combination proved most efficient with MIC of 280 + 280 + 140 μg/ml. Quercetin + morin + rutin with amoxicillin, ampicillin, cephradine, ceftriaxone, imipenem, and methicillin showed synergism, while additive relationship was indicated between morin + rutin and amoxicillin, cephradine, ceftriaxone, imipenem, and methicillin. Quercetin alone had an additive effect with ampicillin, cephradine, ceftriaxone, imipenem, and methicillin. Potassium leakage was highest for morin + rutin + quercetin that improved further in combination with imipenem. Morin and rutin alone had no activity but in combination showed activity against test bacteria. The flavonoids when used in combination with antibiotics were found to increase each other activity against test bacteria. The relationship between the flavonoids and antibiotics in most of the cases was additive. However in a few cases synergism was also observed. Flavonoids alone or in combinations also damaged bacterial cell membrane.

11 May 2016 in SpringerPlus
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AUAsad Ullah
Asad Ullah
MQMUHAMMAD QASIM
MUHAMMAD QASIM
HRHazir Rahman
Hazir Rahman
JKJafar Khan
Jafar Khan
MHMohammad Haroon
Mohammad Haroon
NMNoor Muhammad
Noor Muhammad
Staphylococcus aureus is an increasing problem in clinical practice because of reduced susceptibility to available antibiotics. The objective of the study was to determine the frequency of Methicillin-resistant S. aureus (MRSA) in Peshawar, Pakistan. Clinical isolates of S. aureus were subjected to determination of antibiotic resistance, MICs and inducible clindamycin resistance (ICR). Out of total 280 S. aureus isolates, the frequency of MRSA was 36.1 % (n = 101). MRSA infection was found higher among the age group 50–59 years (60.71 %, OR 3.09), followed by 20–29 years (47.5 %, OR 1.74). Frequency of MRSA in female and male was 39.8 and 34 % respectively. MRSA was more frequent in blood specimens (48.7 %, OR 2.14). The frequency of community and hospital acquired MRSA was 42 and 34.8 % respectively. MRSA showed high resistance (100 %) to penicillin and cefoxitin followed by erythromycin (99 %). While MRSA exhibited 100 % susceptibility to vancomycin and linezolid. We have also found 7 vancomycin intermediate sensitive S. aureus (VISA) isolates. ICR was observed in 15.84 % (n = 16) of MRSA isolates. It is concluded that MRSA is potential threat to public health in Peshawar. Vancomycin and linezolid could be prescribed as a drug of choice in treating MRSA associated infections. In addition, ICR should be routinely checked to avoid clindamycin treatment failure.

18 April 2011 in African Journal of Microbiology Research
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KJKhan Jafar
Khan Jafar
FRFarz Robeena
Farz Robeena
The main objective of this study was to find the incidence of urogenital mycoplasma such asMycoplasma hominis and Ureaplasma urealyticum among patients with history of infertility of unexplained origin and to ascertain their implications in non specific cervicitis and non specific vaginitis. The total number of (n = 337) female patients with history of un-explained vaginitis and cervicitis were screened to observe the prevalence of urogenital mycoplasmas in the disease. Both the high vaginal swabs (HVS) and mid-stream urine were cultured on the liquid media, U-9, and the solid differential mycoplasma agar A-7. The differentiation 0f the implicated organisms were made on the basis of metabolic characteristics of the species. Amongst the total (n = 337) samples, the n = 89 (26.40%) were positive for M. hominis whereas n= 162 (48.07%) isolates determined the U. urealyticum. Upon the outcomes of disease, the cases of non-specific cervicitis yielded the growth of M. hominis and Ureaplasma urealyticum as 32.58% and 59.87% respectively, whereas, among patients of non specific vaginitis, the M. hominis and U. urealyticum were isolated in ratio of 59.55 and 21.60% likewise. From the obtained data in both categories, no solid and direct etiological evidence could be linked to a definite disease outcome of infertility. However, it is certain that these mycoplasmas do cause the urogenital problems as indicated by percents of isolates obtained exclusively. Consequently, after the infection, these organisms could possibly associate for their role in the reproductive failure due to the resulting pathological complications in the urogenital tract of women. Key words: Mycoplasma hominis, Ureaplasma urealyticum, urogenital infections.