The study was conducted to isolate and characterize campylobacter, enterotoxigenic Escherichia coli-labile toxin (ETEC-LT), shigella and salmonella in flies and water. The material for the study, flies (n = 300) and water samples (n = 148), was collected from different localities in and around Lahore, Pakistan. Cultivation of the samples was performed on conventional standard media. Membrane filtration technique was used for water prior to culture. Determination of ETEC-LT was done by GM1 ELISA. Results of our study showed that flies and water were reservoirs for all the four pathogens, campylobacter, ETEC-LT, shigella and salmonella. Flies from the village were carrying fewer enteropathogens, while water from the village was found to be more contaminated as compared to the city. Campylobacter and ETEC-LT were the most frequently isolated pathogens in both flies and water. Thus the incidence of diarrhoeal disease in children of developing countries may be decreased by providing plenty of safe drinking water, improving excreta disposal, toilet facilities and giving education in personal hygiene.

The aim of the present investigation was to study the frequency of Shigella spp. in patients with bloody diarrhea in Pakistan and the susceptibility of isolated Shigella to three antibiotics: ampicillin, cotrimoxazole and nalidixic acid. In addition, the frequency of Campylobacter and Salmonella was also determined. Stool samples (n ϭ 152) were collected from 152 diarrheic children less than six years of age passing blood and mucus in their stools who were admitted to Paediatric Department of Mayo Hospital in Lahore, Pakistan from June to September 1990. The samples were cultivated on standard media for Shigella, Campylobacter, and Salmonella. Susceptibility of Shigella isolates was tested by disk diffusion method. The frequency of isolation was 19.1% for Shigella spp., 7.9% for Campylobacter, and 4.6% for Salmonella. Shigella flexneri (7.9%) was the most frequently isolated species, followed by S. dysenteriae (6.6%), S. boydii, (3.3%) and S. sonnei (1.3%). All Shigella isolates were susceptible to nalidixic acid (100%), while only a few were susceptible to cotrimoxazole (7.0%) and ampicillin (3.5%). In Pakistan, selfmedication and purchases of drugs without a prescription are commonly practiced. Thus, there is a greater possibility of development of resistant strains due to over use of antibiotics. Acute diarrhea with dehydration is an important health problem in children less than five years of age in developing countries. 1-3 The Paediatric Department of Mayo Hospital in Lahore, Pakistan is the center for the Control of the Diarrheal Disease Program for the World Health Organization, where enteropathogens causing diarrhea in children have been previously investigated. 4 Shigella is well known for its clinical severity in bacterial dysentery. Dysentery is characterized by blood, pus, and mucus in stools, which indicates colorectal inflammation. These types of symptoms are common to infections by Shigella, Campylobacter, Salmonella, amoeba, and Clostridium difficile. 5 Shigella spp. are a major cause of acute dysentery in children. 6, 7 Most severe infections require treatment with antibiotics, which leads to over use and misuse of many of the drugs. Moreover, knowledge is insufficient in Pakistan regarding the development of resistant strains to antibiotics most frequently used for the treatment of shigellosis. The aim of the present study was to determine the frequency of Shigella in stools of hospitalized children with enterocolitis and the susceptibility of Shigella spp. to three antibiotics, ampicillin, cotrimoxazole and nalidixic acid, which are generally used for the treatment of bacillary dysentery. In addition, the frequency of Campylobacter and Salmonella was also determined. PATIENTS, MATERIALS, AND METHODS Study population. All children (n ϭ 152) with acute dysentery who were admitted to the diarrhea ward of the Paediatric Department of Mayo Hospital, Lahore from June to September 1990 were selected. Their ages ranged from 1 to 72 months. There were 52 females and 100 males. The mean duration of bloo...

The causative agents of acute diarrhoea were investigated in children under the age of five years from 1985-1991 in three socio-economically different areas in Lahore, Pakistan. The aim was to determine the frequencies of the most common enteropathogens in faeces. The total isolation rate was 73.4%; two thirds (53.5%) were of bacterial and one third (19.9%) of viral origin. ETEC-LT (23.4%), Rota virus (19.9%), EPEC (15%) and Campylobacter (12%) were the single most frequent pathogens in all age groups and areas of living. The positivity of Campylobacter increased from 1.6% to 12% after the change of isolation technique. Shigella was isolated significantly (p > 0.001) more in children over than under one year of age. The incidence of bacterial infections was high during all seasons, while in certain years Rota virus was relatively low in the summer compared to the cooler months. The prevalence of ETEC-LT diarrhoea was higher in the periurban slum as compared to the village and the urban slum. The study is the first of its kind in Pakistan, and the results are similar to other comparable studies. It is thus possible to establish a well functioning and reliable microbiological laboratory in developing countries in a setting with restricted trained personnel and material resources.

Campylobacter jejuni and C. coli strains were collected during three different years from adult patients with enterocolitis in Sweden (n= 372) from 49 patients in Kuwait, and Campylobacter strins from hens from Mexico, Pakistan and Sweden (n= 107) and Swedish pigs (n= 47). C. jejuni was the predominant species in human and hen isolates, and C. coli in pigs C. coli was significantly more common in human isolates from Sweden, and more common in hen isolates from Pakistan, than in hens from Sweden and Mexico. C. laridis was only isolated from pigs (17%) and was in no case enterotoxigenic. Both in human and hen isolates, C. jejuni strains were more enterotoxigenic than C. coli strains. C. jejuni strains from Swedish hens were less enterotoxigenic than those from Pakistan and Mexico (P < 0.001), and strains from pigs were less enterotoxigenic than those from hens (P < 0.001). We conclude that C. jejuni are more often enterotoxigenic and possibly more virulent than C. coli and C. laridis. The relative frequency of C. jejuni and C. coli in humans and animals differs from one country to another.

AimsObsessive-Compulsive Disorder (OCD) is an anxiety disorder, which is the sixth largest contributor to non-fatal health loss globally. Coronavirus disease (COVID-19) pandemic, aside from its impact on physical health, has also had its effects on mental health. This study aimed to explore the frequency of new onset OCD symptomology in medical students amidst COVID-19 pandemic and its association with potential sociodemographic parameters.MethodThis cross-sectional study was conducted among medical students studying in Pakistani medical colleges. Data were collected after ethical approval from 1st January 2020 to 20th January 2020 during the second COVID-19 wave. Participants with a history of diagnosed psychiatric illness such as OCD, bipolar disorder, depression, anxiety and those taking relevant medications were excluded from the study. The online questionnaire included Yale-Brown Obsessive-Compulsive Scale (Y-BOCS) and Revised Padua Inventory-Contamination Subscale (PI-CS), which were used to assess OCD symptoms and aversion for contamination respectively. Participants filled Y-BOCS twice, once for pre-pandemic score (based on self-recall), and a second time during 2nd wave of COVID-19. Data were analysed using IBM SPSS v23.0 (Armonk, N.Y., USA).ResultThe study included 711 participants (Males: 29.8%, Mean age: 21.59 ± 1.52 years) from over 46 medical colleges and over 44 cities of Pakistan. The mean pre-pandemic and mid-2nd wave Y-BOCS scores were 11.86 ± 6.02 and 15.61 ± 7.41 respectively. The mean PI-CS score was 17.27 ± 9.17. Twenty five percent (n = 176) of students developed new onset OCD symptomology during pandemic, while seventy percent (n = 497) suffered from worsened Y-BOCS score during pandemic. New onset OCD symptomology was associated with age less than 20 years (p = 0.02), higher PI-CS score (p = 0.001) and studying in preclinical years (p = 0.002). Worsening of YBOCS score had significant association with female gender (p = 0.02), attending pandemic related awareness seminar (p = 0.027), studying in preclinical years (p < 0.001) and age less than 20 years (p < 0.001). High Padua scorers (16 and above) showed significant association with increase in YBOCS score (p < 0.000), age less than 20 years (p = 0.005), preclinical years (p = 0.001), frequency of engagements in pandemic related discussions (p = 0.001) and change in YBOCS score (p < 0.001).ConclusionOur findings indicate that the prevalence of OCD symptomology increased during the COVID-19 pandemic as demonstrated by increased Y-BOCS scores.Femal medical students and students in preclinical years are more likely to suffer from psycological impact of COVID-19 pandemic and heightened concerns and fear for contamination.