Antibiogram and molecular characterization of extended-spectrum ß-lactamase-producing pathogens implicated in chronic suppurative otitis media.

Introduction: beta-lactamase-producing bacteria, especially extended-spectrum beta-lactamase (ESBL) producers have strong clinical relevance and have been implicated in chronic suppurative otitis media (CSOM) treatment failures. This study aimed to determine the frequency, antibiogram, and molecular characteristics of ESBL-producing gram-negative bacterial (GNB) pathogens isolated from patients with CSOM. Methods: three hundred (300) ear swab samples collected from patients with active CSOM were analysed using standard microbiological techniques. Antibiogram of pathogens was determined by Kirby-Bauer disk diffusion technique. Phenotypic detection and molecular characterization of ESBL-producing GNB pathogens were performed by double disk synergy test (DDST) and polymerase chain reaction (PCR). Results: Escherichia coli and P. aeruginosa were more prevalent among CSOM patients with a duration of discharge >2 weeks. The frequency of ESBL producers among the GNB pathogens was 18.3%. Isolates were generally multidrug-resistant but very susceptible (100% - 70.4%) to ciprofloxacin, imipenem, and amikacin. Multiple antibiotic resistance values of the isolates ranged from 0.7-0.8. Polymerase chain reaction showed that blaSHV (47.6%) was the most predominant ESBL genotype. This was followed by blaTEM (25.2%) and blaCTX-M (10.7%) as the least predominant ESBL gene. Concomitant expression of ESBL gene was observed in 13.6% of the isolates. Conclusion: this study reported the occurrence and spread of ß-lactamase-producing bacteria in patients with CSOM infections. It is therefore very crucial to screen for antibiotic-resistant pathogens at early stages of CSOM infections, for proper antimicrobial therapy and to curb the increasing spread of antimicrobial resistance.

Anaesthetic and surgical management of airway penetrating injuries in children in resource-poor setting: Case reports.

INTRODUCTION: Impacted penetrating foreign body (FB) in the airway especially the postnasal space presents with management challenges. The challenges are worsened by lack of modern equipment in resource-poor settings. Two suchlike cases were managed in this report. PRESENTATION OF CASES: Case 1: A 4-year-old girl who fell on a metal rod in her mouth while playing alone. Examination revealed an agitated child in open mouth posture, with a silvery straight metallic object impacted on the hard palate and projecting from the mouth. X-ray of the post nasal space showed a radiopaque object through the hard palate impinging on the skull base. Case 2: A 5-year-old male presented with swollen neck and difficulty in breathing following a fall on a sharp pencil while at play in school. The object which pierced through the neck was immediately removed by an attendant. Examination revealed a child in obvious respiratory distress with swollen neck, face and eyes with a slit measuring 2cm over the crico-thyroid membrane (subcutaneous emphysema). DISCUSSION: With no available fibre-optic laryngoscope, classical Macintosh laryngoscopy was infeasible. With refusal of tracheostomy, the authors employed three-man intubation technique to successfully secure the airway for excision of the FB in first patient. The second was induced with IV ketamine since he could not tolerate the supine position and facemask. Due to falling oxygen saturation, an orotracheal intubation was done before a successful mid-level emergency tracheostomy was sited. CONCLUSION: Penetrating airway injuries in children pose serious management challenges. Careful anticipation and quick intervention are helpful.

Our experience with pre-operative haemostatic assessment of paediatric patients undergoing adenotonsillectomy at Federal Medical Centre, Makurdi.

BACKGROUND: In 2-4% of all patients requiring adenoidectomy, tonsillectomy or adenotonsillectomy, pre-operative screening tests for coagulation disorders are indicated to detect surgical bleeding complications. However, because of cost effect on the patients, the usefulness of these tests is being challenged. We therefore highlight our experience in paediatric patients undergoing adenoidectomy, tonsillectomy or both in our centre. PATIENTS AND METHODS: This is a 3½-year analysis of the data of 165 paediatric patients who had adenoidectomy, tonsillectomy or both over the study period. The data collected included age, sex, procedure done and detailed clinical bleeding history. RESULTS: A total of 165 children had either adenoidectomy or tonsillectomy, or both. There were 76 males and 89 females giving a male to female ratio of 1:1.2. Their ages ranged from 10 months to 18 years. Eighty-five (51.5%) patients had adenotonsillectomy, 48 (29.1%) and 32 (19.4%) had only tonsillectomies and adenoidectomies, respectively. Only 11 (6.7%) families volunteered the history of either prolonged bleeding with minor injury on the skin or occasional slight nose bleeding. Six (3.6%) patients including 3 of the children with positive family history had posttonsillectomy bleed, out of which 4 (66.7%) were moderate whereas the remaining 2 (33.3%) were severe bleeding, which was not statistically significant (P = 0.041). The two cases of severe bleeding had fresh whole blood transfused whereas the rest that had no bleeding issues were discharged home 48 h postoperatively. CONCLUSION: Our experience in this study suggests that detailed bleeding history is necessary as well as pre-operative haemostatic assessment, if available and affordable for paediatric patients undergoing adenotonsillectomy.