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Biomedical subjects

Godwin Wilson

Publications and source records attributed to Godwin Wilson.

7 recordsLinked to original sources

Isolation & antimicrobial susceptibility of Shigella from patients with acute gastroenteritis in Western Nepal.

BACKGROUND & OBJECTIVE: Shigellae play an important role as a causative organism of acute gastroenteritis, which is a global health problem with significant morbidity and mortality in especially in developing countries. This study was carried out to determine the isolation and pattern of antimicrobial resistance of Shigella in patients with acute gastroenteritis in western Nepal. METHODS: The study included all patients with acute gastroenteritis who visited a tertiary care hospital at Pokhara, Nepal during a 2-year period (2002-2004). The isolates was confirmed as Shigella by biochemical reaction and slide agglutination test using specific antisera. Antibiotic sensitivity test was determined by agar diffusion method and minimum inhibitory concentration (MIC) of the drugs was detected. RESULTS: Of the 770 stool samples, 83 (10.8%) yielded Shigella. Shigella flexneri caused 56 (67.4%) of the total cases of shigellosis followed by S. dysenteriae 12 (14.5%), S. sonnei 10 (12%) and S. boydii 5 (6%). Of the 83 isolates, 67 (80.7%) showed resistance to various drugs and 62 (74.7%) were resistant to two or more drugs. Resistance to cotrimoxazole was 80.7 per cent followed by tetracycline 74.7 per cent, ampicillin 53.0 per cent, nalidixic acid 31.3 per cent and ciprofloxacin 2.4 per cent. The MIC(50) and MIC(90) values of those drugs were also very high. All isolates were sensitive to cefotaxime and ceftriaxone. INTERPRETATION & CONCLUSION: The findings of our study suggested that Shigellae was an important etiological agent for acute gastroenteritis, with a high rate of drug resistance and requires constant monitoring in this region.

Acute Disease↗

Salmonella bacteraemia in Pokhara: emergence of antibiotic resistance.

We undertook a retrospective hospital based study of 2,354 blood culture specimens from June 2000 to May 2003 in order to determine the isolation rates of Salmonella species and their antibiotic susceptibility patterns in western Nepal. Blood samples were cultured and identification of Salmonella species. and their antibiotic susceptibility testing were done as per standard protocol. Of the total 114 (4.8 %) yielded Salmonella species. Of them 76 (66.7%) Salmonella typhi and 38 (33.3%) S. paratyphi A. S. typhi was found to be the predominant species each year. Higher proportion of Salmonella bacteraemia was seen in adults, with a clearcut male to female preponderance (1.8:1). Monsoons enhanced the risk of acquiring enteric fever. There is also a rise in the number of multi-drug resistant strains in and around Pokhara Valley, with 40.7% S. typhi and 5.2% S. paratyphi A showing resistance to two or more antibiotics. These isolates were primarily resistant to the first line drugs namely Ampicillin, Chloramphenicol and Cotrimoxazole but susceptible to third generation Cephalosporins. Appearance of multi drug resistance poses considerable threat of increased morbidity and mortality in this region. This emphasizes the need for prudent use of antimicrobials.

Adolescent↗

Emerging opportunistic protozoa and intestinal pathogenic protozoal infestation profile in children of western Nepal.

Intestinal parasitic infestation continues to be of public health importance in many tropical and subtropical countries for their high prevalence and effects on the morbidity in the population. This 5-year hospital-based retrospective analysis was aimed to find out the intestinal protozoal parasitic profile in 1790 pre-school and school-going children visiting the hospital with gastrointestinal illness. Giardia lamblia was the most prevalent pathogenic protozoan intestinal parasite (73.4%), followed by Entamoeba histolytica (24.4%). Interestingly, "newer" opportunistic pathogens like Cyclospora cayetanensis (1.0%) and Cryptosporidium sp. (1.0%) were detected from immunocompromised children below 2 years of age as a result of vertical transmission, which is alarming for a country like Nepal at the stage of 'concentrated epidemic' of HIV infection.

Animals↗

Chromobacterium violaceum septicemia.

Chromobacterium violaceum is an extremely rare human pathogen. We report a rare case of septicemia with multiple abscesses and otitis media in a newborn caused by chromobacterium violaceum.

Bacteremia↗

Primary meningoencephalitis by Naegleria fowleri: first reported case from Mangalore, South India.

A fatal case of primary amebic meningoencephalitis (PAM) in a 5-month-old infant is described. The disease may have been contracted during bathing. The source of water was from an artificial well. The clinical presentation, the isolation of the ameba from the cerebrospinal fluid, the poor response to amphotericin B, and the ultimate fatal outcome are all consistent with the diagnosis of PAM. On the basis of its ability to grow at temperatures above 30 degrees C, the morphology of the trophozoite, and the presence of flagellate forms, the ameba was identified as Naegleria fowleri. Pathogenic N. fowleri amebae were recovered from samples of water from the well. To our knowledge this case represents the second case of PAM in an infant in the absence of the history of swimming.

Amebiasis↗

An unusual case of actinomycosis.

We describe an unusual case of actinomycosis that appeared as a nasal mass. The diagnosis was established when Actinomyces viscosus was isolated from pus obtained from the right maxillary antrum by intranasal antrostomy. The patient was treated with intravenous crystalline penicillin and made an uneventful recovery within 10 days.

Actinomyces↗