1.Sudden sensorineural hearing loss: A missed opportunity for treatment
Ahmad Hafiz Ali ; Zulkiflee bin Salahuddin ; Rosdan Salim
Malaysian Family Physician 2018;13(3):29-31
Sudden sensorineural hearing loss (SSNHL) is an otology emergency and carries significant
morbidity if the diagnosis is missed. It can present to any specialty but in our local setting the
patient usually presents to primary care as it is easily accessible. We present a case of SSNHL
that was initially presented to a primary care centre and the patient was reassured without any
investigation being carried out. SSNHL has many causes thus making diagnosis difficult. However,
with knowledge of its possible, a diagnosis can be made and appropriate management can be
advocated to the patient. Hence, we discuss the three main causes of SSNHL, while emphasizing
the immune system-mediated mechanism as the main cause in this case.
2.Effectiveness of cephalosporins Microbiology in hydrolysis and inhibition of Staphylococcus aureus and Escherichia coli biofilms
Jawaria ASLAM ; Hafiz MUHAMMAD ALI ; Shujaat HUSSAIN ; Muhammad Zishan AHMAD ; Abu Baker SIDDIQUE ; Muhammad SHAHID ; Mirza Imran SHAHZAD ; Hina FATIMA ; Sarah TARIQ ; Fatima SADIQ ; Maria ASLAM ; Umar FAROOQ ; Saadiya ZIA ; Rawa Saad ALJALUOD ; Khaloud Mohammed ALARJANI
Journal of Veterinary Science 2024;25(3):e47-
Objective:
The study examined the efficacy of various generations of cephalosporins against biofilms developed by pathogenic S. aureus and E. coli.
Methods:
The development of biofilms by both bacteria was assessed using petri-plate and microplate methods. Biofilm hydrolysis and inhibition were tested using first to fourth generations of cephalosporins, and the effects were analyzed by crystal violet staining and phase contrast microscopy.
Results:
Both bacterial strains exhibited well-developed biofilms in petri-plate and microplate assays. Cefradine (first generation) showed 76.78% hydrolysis of S. aureus biofilm, while significant hydrolysis (59.86%) of E. coli biofilm was observed by cefipime (fourth generation). Similarly, cefuroxime, cefadroxil, cefepime, and cefradine caused 78.8%, 71.63%, 70.63%, and 70.51% inhibition of the S. aureus biofilms, respectively. In the case of E. coli, maximum biofilm inhibition (66.47%) was again shown by cefepime. All generations of cephalosporins were more effective against S. aureus than E. coli, which was confirmed by phase contrast microscopy.
Conclusions
and Relevance: Cephalosporins exhibit dual capabilities of hydrolyzing and inhibiting S. aureus and E. coli biofilms. First-generation cephalosporins exhibited the highest inhibitory activity against S. aureus, while the third and fourth generations significantly inhibited E. coli biofilms. This study highlights the importance of tailored antibiotic strategies based on the biofilm characteristics of specific bacterial strains.