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Antimicrobial Resistance Profiles and Clonal Relatedness of <i>Pseudomonas aeruginosa</i>Strains Recovered from Wounds Infections of Outpatient Population Presenting in a Rural Hospital in Kenya

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Advances in Microbiology 2019年第2期9卷 119-130页

作者： Thomas Gachuki Thuo Ciira Kiyuukia John Maina Terry Judah susan kiiru John kiiru Jomo Kenyatta University of Agriculture and Technology Juja Kenya Kenya Medical Research Institute Centre for Microbiology Research Nairobi Kenya

Pseudomonas aeruginosa is a leading cause of hospital infections and is intrinsically resistant to most antibiotics. Emergence of multidrug resistant (MDR) strains has been reported in the world and poses a great challenge in the management of infections associated with this species. While a substantial amount of research has been done on strains from most of other infection caused by this species in developed countries, little is known about the susceptibility profiles of strains recovered from African countries in general and Kenya in particular. Furthermore, there is paucity of data regarding strain, phenotype and genetic diversity of strains recoverable from wounds among patients in Kenya. The possible risk factors for acquisition of MDR strains and possible factors that could fuel clonal expansion in hospital and community settings remain undetermined. This cross-sectional study conducted in Tigoni Hospital, a rural area in Central Kenya sought to determine risk factors associated with carriage of MDR Pseudomonas aeruginosa in wounds among rural population. We also analyzed antimicrobial resistance profiles among these isolates. Prevalence of P. aeruginosa in wounds was 28% with 85 isolates recovered from wounds of 299 participants. Most antimicrobial resistance prevalence was recorded towards Ceftazidime (64%) and Cefepime (52%) while Piperacillin-tazobactam was the most effective antimicrobial agent with a resistance prevalence rate of 20%. Resistance towards new classes of aminoglycosides such as Gentamicin was at 45% while that towards Amikacin was at 40%. Compared to other related studies, relatively lower resistance towards Ciprofloxacin (25%) and Meropenem (40%) were recorded. Some of the risk factors identified for carriages of MDR strains were self-medication (p: 0.001, C.I: 3.01 - 8.86, O.R: 5.17) and non-completion of dosage (p: 0.12, C.I: 0.9 - 2.5, O.R: 1.5).

关键词： Carbapenems Resistance Risk Factors Related to Carbepenems Resistance Carriage of Pseudomonas aeruginosa in Wounds Clonal Relatedness

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Antimicrobial Profiles of Selected Gram-Negative Bacteria Recoverable from Sewage and Sludge from Juja and Kibera Informal Settlements of the Larger Nairobi Metropolis

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Advances in Microbiology 2019年第6期9卷 507-524页

作者： John Maina Perpetual Ndung’u Anne Muigai Helen Onyango Joel K. Mukaya susan Wambui Terry Judah Joyce Kinyua Joystella Muriuki Lynne Chesenge Lydia Kisoo Rebecca Thuku Boniface Wachira Vincent Bett Thomas Gachuki John kiiru Jomo Kenyatta University of Agriculture and Technology Juja Kiambu County Central Kenya Kenya Center for Microbiology Research Kenya Medical Research Nairobi Kenya

Africa has experienced rapid urban migration in the past two decades. New informal settlements continue to emerge and expand but the sanitation provision of facilities has not improved at the same pace and this poses a serious health concern to the public especially the urban poor. Open sewage systems and sludge-clogged drainage systems as well as soil contaminated with industrial and domestic wastes are possible sources of germs that probably cause clinical infections and epidemics. In this cross-sectional study, we recorded diverse genera of Gram-negative non-fastidious bacteria that included;Escherichia coli (23%), Klebsiella spp (21%), Enterobacter spp (19%), Citrobacter spp (10%), Pseudomonas aeruginosa (8%), Proteus spp (7%), Salmonella (3%), Yersinia spp (3%), Shigella spp (2%), Morganella morganii (2%), Edwardisella spp (1%), Hafnia spp (1%), Serratia marcesence (0.5%), and Acinetobacter baumannii (0.5%). Most of these isolates were resistant to ampicillin while imipenem and ciprofloxacin were the most effective antimicrobial agents. Resistance combination towards ampicillin, trimethoprim, sulfamethoxazole and streptomycin was also noted in recovered isolates (16%). An overall high antimicrobial resistance was recorded among isolates from slum as compared to those recovered from Juja, a middle-class settlement located at the edge of Nairobi metropolis. The prevalence of isolates with a combined resistance to 3rd generation cephalosporins (cefotaxime, ceftriaxone and ceftazidime), gentamicin and ciprofloxacin was the highest among P. aeruginosa isolates (13%) but none of the Yersinia species and Edwardisella tarda exhibited this resistance. Carriage of blaTEM (52%) was most prevalent in all bacteria species followed by blaCTX-M (20%), blaSHV (18%) while blaOXA (17%) was the least common. The phylogeny analysis revealed significant genetic similarity among strains belonging to E. coli, K. pneumoniae, E. agglomerans and P. mirabilis strains but less relatedness

关键词： Antimicrobial Resistance Multiple-Drug Resistance (MDR) Extended Spectrum β-Lactamases (ESBL) Enterobacteriaceae Sewage and Sludge

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