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دراسة المسببات الميكروبية الشائعة للاسهال لدى الاطفال دون خمس سنوات من العمر وتوصيف عاثية الامعاء
Author name:
مروة محمود يعقوب
Supervisor name:
كوثر هواز مهدي | حيدر عبد الحسين مكلف
General topic:
Biology
Specific topic:
Microbiology
Degree:
Master
University:
University Of Basrah - College Of Education For Pure Sciences
Language:
Arabic
University location:
Basrah
First pages:
24T3571 - p.pdf
Abstract:
The purpose of present study was to detection of Rotavirus A and Escherichia Coli from diarrhea cases in children, and characterization of E.coli phag, in addition to study some of factors that influence on Diarrhea.Stool samples were collected between 15/11/2014 and 1/4/2015 from children 0 to 59 months of age who were hospitalized in Basra hospital for women and children, Basra/Iraq. A total of 300 children with acute gastroenteritis were enrolled, including 199 males and 101 females.In this study among children with Diarrhea was 93/300 (31%) Rotavirus positive cases by Immunochromatographic (IC) test as monoinfection (1.66%), coinfection (26.34%), and mixing infections (3%). Out of 50 IC positives fecal samples were tested using electronic microscope, 50(100%) were found positive. A total of 80 stools were examined for Rotavirus using polyacrylamide gel electrophoresis. The overall agreement was 68/80(85%).Furthermore, regardless of the types of infection, monoinfection or coinfection or mixing, Bacteria was isolated, including; 277/300 (92.33%) children had infections with Escherichia coli, 39/300 (13%) cases with Salmonella spp., While, Shigella spp. was reported in 12/300 (4.01%) samples. The identification of bacterial pathogens was later confirmed by Api 20 Enterobacteraceae system. Also parasitic causes were found in 6/300 (2%) samples.Overall, this study recorded 182 /300 (60.66%) of monoinfection cases including; 5 /300 (1.66%) with Rotavirus, 163 /300 (54.33%) with Escherichia coli, 6 /300 (2%) with Salmonella spp., 2 /300 (0.67%) with Shigella spp., 3 /300 (1%) with Entamoeba histolytica, 3 /300 (1%) with Giardia lamblia. Coinfection with another microorganism was observed in 109/300 (36.34%) cases, coinfection with Rotavirus and Escherichia coli were the most common and occurred in 75/300 (25%) cases.Antibiotic susceptibility testing was performed on Muller Hinton agar against five different antibiotics to 30 isolates of E. coli. The antibiotic resistance/susceptibility profile of E. coli isolates revealed that most of the isolates were resistant to three tested antibiotics (Trimethoprim, Ampicillin and Doxycyclin). The phage ɸEC - MH1 was isolation successfully from sewage. The phage titer was determined by serial dilution (10 - 1 to 10 - 9) of the sample by counting the number of plaque forming units (p.f.u.) for each dilution.Results revealed that dilution factor 10 - 2 was the best countable number of plaques. The statistical analysis was significantly decrease P≤ 0.05 in phage titer at the temperature 50C° and 65C° during different times comparing with phage titer at the temperature 37C°. Effects of chloroform on phage titer during different times were completely inactivated comparing with saline environments. Furthermore, regarding some clinical information; the present study showed that 66.33% of the males were more susceptible to the infection with highly significant (P<0.001) than females (33.67%). Mean age (mean ± standard deviation) of all positive cases was 11.02±12.3 months, and the age periods between (0 - 5) and (6 - 11) were significantly prone to the infection.Also, all cases were complained with diarrhea (100%), fever (82.34%), Vomiting (43%) then dehydration (2.67%). In addition, all positive cases become increased in December (32%) and city center (81%). This study showed positive cases increase (69%) of children with artificial feeding
