Prevalence of Schistosoma mansoni-Salmonella coinfection among patients in southern Ethiopia.

Concurrent infection with Schistosoma mansoni and Salmonella species is not uncommon in the endemic area of sub-Saharan Africa, although its prevalence may have regional variations. We discuss such coinfection and associated factors in an Ethiopian context. We assessed the prevalence of S. mansoni and Salmonella coinfections among patients attending two hospitals in southern Ethiopia. A facility-based cross-sectional study was carried out between 1 October and 30 November 2019. In total 271 participants with gastrointestinal complaints were selected through a systematic sampling technique. S. mansoni was detected using direct microscopy and formalin-ether concentration techniques, whereas Salmonella was identified by conventional culture methods and the Widal test. Antibiotic susceptibility test for Salmonella isolates was performed. The prevalence rates of S. mansoni and Salmonella infections were 17.30% and 7.70% respectively. The prevalence of S. mansoni-Salmonella coinfection was 7.7%. Of the factors analysed in connection with coinfection, male sex, age and frequency of exposure to contaminated water bodies were found to be statistically significant. S. mansoni-Salmonella coinfections pose a grave health problem in the study area, especially among children. Our conclusions can be used by the medical community to frame and implement intervention strategies for the management of S. mansoni-Salmonella coinfections.

Efficacy of topotecan treatment on an experimental model of transient evoked otoacoustic emissions.

OBJECTIVE: The aim of this study was to investigate the effects of topotecan (Hycamtin), a topoisomerase I inhibiting anticancer agent, on Transient Evoked Otoacoustic Emissions (TEOAEs) of the rabbits. We planned to investigate whether this test might provide a method for monitoring early ototoxic influence of drug administration to the cochlea. METHODS: The study was conveyed in two groups each consisting of five rabbits with a total of ten ears. Rabbits in group I received i.v. topotecan (0.5 mg/kg once daily) for 3 days. Rabbits in group II received i.v. topotecan (0.25 mg/kg once daily) for 3 days. Cochlear function was serially monitored using transient evoked otoacoustic emissions before administration (BA) and on the 4th and 15th days after administration of topotecan. TEOAEs were analysed in terms of mean stimulus, stability and emission amplitude at 1.0-4.0 kHz. RESULTS: For group I and II, intergroup and intragroup differences were not statistically significant in the mean stimulus, stability and emission amplitudes at 1.0-4.0 kHz. CONCLUSIONS: We evaluated the potential role of TEOAEs in early identification of cochlear dysfunction induced by topotecan. It was concluded that topotecan did not have ototoxic effects on the cochlea in the early period of administration. TEOAEs may be useful to monitor the cochlear function and to detect the late stage of ototoxicity especially in the presence of potentially toxic factors for the prevention of permanent damage.

Efficacy of amitriptyline in the treatment of subjective tinnitus.

We investigated the effect of amitriptyline, a tricyclic antidepressant, on patients with subjective tinnitus. The study group consisted of 37 adult patients admitted to the Ear, Nose, and Throat and Audiology Department of Hacettepe University. The amitriptyline group consisted of 20 patients and the placebo group consisted of 17 patients. All of the patients were evaluated using a questionnaire, audiologic evaluation, high-frequency audiometry, impedancemetric tests, auditory brainstem response, tinnitus frequency, and loudness matching assessed by audiometric methods at the beginning and end of the study. The patients in the amitriptyline group received 50 mg/day amitriptyline in the first week and 100 mg/day for the following 5 weeks. In the placebo group, the patients received tablets consisting of lactose starch for 6 weeks, with a dosage of 1 tablet/day. The subjective complaints of the patients in the amitriptyline group decreased, and the "present" symptoms resulted in fewer complaints. The severity of tinnitus decreased in the amitriptyline group by means of subjective and audiometric methods. In the placebo group, no significant change was observed. The success of treatment was 95% in the amitriptyline group and 12% in the placebo group. Amitriptyline therapy was concluded to be effective.

High frequency hearing loss in Ullrich-Turner syndrome.

UNLABELLED: A total of 38 patients with Ullrich-Turner syndrome underwent standard otological and audiometric evaluation as well as high frequency audiological tests. Some 26 (68.4%) patients had a history of middle ear infections, and ten (26.3%) had required otolaryngological surgery. Conventional audiometry (125-8000 Hz) demonstrated normal hearing in only 25 of the ears (33%); between 500-4000 Hz, 16 ears (21.0%) had a mixed type and eight ears (10.5%) had conductive hearing loss. High frequency audiometry (8-18 kHz) revealed sensorineural hearing loss in 98.7% of the ears. Our results for conventional audiometry are in accordance with the literature. CONCLUSION: The detection of a high prevalence of hearing loss in the high frequency range brings a significant new perspective to the pursuit of the aetiology of ear and hearing problems in Ullrich-Turner syndrome. This pathology seems to be a premature variant of presbycusis and it may underlie future hearing impairment which will come to clinical attention only after it progresses to conventional testing frequencies. While further studies are underway to evaluate this aspect, routine otological and audiological follow-up of patients with Ullrich-Turner syndrome is warranted from the time of diagnosis.

The influence of torque and velocity on erector spinae muscle fatigue and its relationship to changes of electromyogram spectrum density.

The influence of contraction force and velocity during isokinetic contractions on the development of fatigue in the erector spinae muscle was studied. Seven male subjects performed a series of 250 contractions at 25% and 50% of their isometric maximal voluntary contraction (MVC) at 40 and 80 degree.s-1. Fatigue defined as a decrease of the contractile capacity of the muscles was studied by means of a 15-s maximal test-contraction following the exercise. Both the initial force and the force decrement during the test-contraction were studied. Surface electromyogram (EMG) signals of the main tracts of the erector spinae muscle were recorded. The frequency content was studied by calculating the zero-crossing rate for the signals obtained during dynamic contractions and by means of fast Fourier transformation for the test contraction. After the 50% MVC dynamic contractions the initial force during the postexercise test-contraction was significantly lower than after the 25% MVC contractions. No significant influence of contraction velocity on fatigue development was found. The force decrement during the test-contraction did not depend on the experimental conditions. The EMG amplitude indicated that the subjects were better able to relax their muscles during the counter movement (flexion) at high forces and high velocities compared to the other experimental conditions. The frequency content of the EMG signals during the dynamic contractions and the postexercise test-contraction showed only very weak relationships with fatigue. Therefore, spectrum EMG parameters as determined in the present study do not seem suitable as indicators of muscle fatigue as a consequence of dynamic contractions of trunk extensor muscles.