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A Five-year Review on the Etiology and Antimicrobial Susceptibility Pattern of Otitis Media Pathogens in Jordanian Children.

ABSTRACT: OBJECTIVE: This study aimed to identify the bacteriological agents of otitis media in Jordanian children and to assess the in vitro susceptibility of these isolates to commonly used antibiotics. METHODS: Retrospective analysis of consecutive samples submitted for microbiological evaluation from outpatients children aged between 6 months and 15 years who were clinically diagnosed with otitis media and were treated at Princess Rahma Hospital in North Jordan between January 2005 and December 2009. RESULTS: A total of 724 isolates were recovered from cultures obtained from 863 children patients giving an isolation rate of 83.8%. The male and female isolate ratio was (1.26:1.0). The most common bacterial species isolated were S. aureus (59.9%) followed by Streptococcus pneumoniae (22.4%), Pseudomonas (7.7%), E. coli (5.9%), Klebsiella spp. (3.1%) and Proteus spp. (0.9%). The most of S. aureus isolates were susceptible to vancomycin (94.0%) and gentamicin (87.3%). Streptococcus organisms were susceptible in highest percentage to amoxicillin-clavulanic acid (87.1%). Gram-negative isolates were highly susceptible to ciprofloxacin (83.5%) and gentamicin (79.8%). Among all isolates, vancomycin was the most effective antimicrobial agent with susceptibility rate of 83.9%, whereas cefixime showed the lowest susceptibility rate of 39.7%. CONCLUSIONS: S. aureus isolates were the most frequent bacteria isolated from otitis media and were highly sensitive to vancomycin and gentamicin, while gram-negative isolates were more sensitive to ciprofloxacin and gentamicin.

SUBMITTER: Al-Shara M

PROVIDER: S-EPMC3472576 | biostudies-other | 2012 Sep

REPOSITORIES: biostudies-other

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Project description:Lower respiratory tract infections (LRTIs) are the most common infections in humans. It is estimated that 2.74 million deaths worldwide occur each year due to LRTIs. The aim of the study was to determine the frequency and antibiotic susceptibility pattern of microorganisms isolated from respiratory samples of patients with LRTIs. Between January 2015 and December 2019, a total of 7038 sputum and bronchoaspirate samples from suspected LRTI patients were collected. Among them, 2753 samples (39.1%) showed significant microbial growth on culture media. The LRTI rate was higher in patients with male gender (67.1%) and with age between 40-59 years (48.6%). The microorganism identification and antibiotic susceptibility testing were performed with Vitek 2. Out of 4278 isolates species, 3102 (72.5%) were Gram-negative bacteria, 1048 (24.5%) were Gram-positive bacteria, and 128 (3.0%) were Candida spp. Major microorganisms isolated were Acinetobacter baumannii (18.6%), Staphylococcus aureus (15.2%), Pseudomonas aeruginosa (14.2%), and Klebsiella pneumoniae (10.9%). In antimicrobial susceptibility testing, Staphylococcus aureus isolates were mostly resistant to Penicillin G (84.1%) and Oxacillin (48.1%), whereas they demonstrated maximum sensitivity to Tigecycline (100%) and Linezolid (99.5%). Among Gram-negative isolates, Acinetobacter baumannii showed maximum sensitivity to Colistin but was resistant to other antibiotics (95-99%). Klebsiella pneumoniae isolates were mostly resistant to Cefotaxime (72.7%) and sensitive to Gentamicin (54.3%), and Pseudomonas aeruginosa was resistant to Ciprofloxacin (40.3%) and sensitive to Amikacin (85.9%). Gram-negative bacteria represented the species most commonly isolated. A high rate of antimicrobial resistance was observed in this study. In conclusion, the correct identification of causative microorganisms and their susceptibility patterns to antibiotics is crucial for choosing targeted and effective antibiotic therapy in LRTIs, and to prevent the emergence of multidrug-resistant bacteria.

Project description:BackgroundAntimicrobial resistance of Neisseria gonorrhoeae is a serious health problem in China. Gonococcal antimicrobial susceptibility has been monitored in Shanghai since 1988. In this study, we examined the changing pattern of gonococcal antimicrobial susceptibility based on data from N. gonorrhoeae isolates collected over the past 25 years.MethodsApproximately 100-200 isolates each year (1988-2013) were tested for their susceptibility to penicillin (PEN), tetracycline (TET), ciprofloxacin (CIP), ceftriaxone (CRO) and spectinomycin (SPT), using the agar dilution method. Plasmid-mediated N. gonorrhoeae antimicrobial resistance, comprising penicillinase-producing N. gonorrhoeae (presumed PPNG) and high-level tetracycline resistance N. gonorrhoeae (presumed TRNG), were also determined. Breakpoints for susceptibilities followed those described by the Clinical and Laboratory Standard Institute and the European Committee on Antimicrobial Susceptibility Testing.ResultsA high proportion of isolates were resistant to PEN, TET and CIP, ranging from less than 20% at the beginning of the survey, increasing in the late 1990s and reaching over 90% in recent years. The proportion of isolates exhibiting plasmid-mediated resistance exceeded 38% for presumed PPNG and 20% for presumed TRNG in recent years. The proportion of CRO nonsusceptible isolates (MIC???0.125 mg/L) ranged from 7% to 13% in most of the study years. Almost all isolates were susceptible to SPT. The SPT MIC90 was 16-32 mg/L for 2008-2013. The proportion of CRO nonsusceptible-associated multiple-drug-resistant (MDR) isolates was over 5% in most of the study years.ConclusionsN. gonorrhoeae isolates in Shanghai were resistant to PEN, TET and CIP. Furthermore, CRO nonsusceptible and MDR isolates were prevalent. N. gonorrhoeae isolates were also found to be susceptible to SPT. It is recommended that the CRO dose be increased from currently recommended 250 mg to 500 mg and that SPT be an alternative in treating urogenital gonorrhea. Our findings highlight the importance of both regional and national surveillance programs for the prompt modification of treatment guidelines, vital in responding to the changing pattern of gonococcal antimicrobial susceptibility.

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A Five-year Review on the Etiology and Antimicrobial Susceptibility Pattern of Otitis Media Pathogens in Jordanian Children.

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