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دراســــة الفعالية التضادية لجرثومة Bifidobacterium spp تجاه جرثومة Staphylococcus aureus المقاومة للمثيسلين == Studying The Antagonistic Activity of Bacteria Bifidobacterium Spp Against Bacteria Methicillin Resistance Staphylococcus Aureus

اسم المؤلف: انغام نجاح هادي الخفاجي

اسم المشرف: سهام جاسم الكعبي

الموضوع العام: علوم الحياة

السنة: 2014

الموضوع الدقيق: الاحياء المجهرية

الدرجة: ماجستير

الجامعة: جامعة الكوفة - كلية التربية - قسم علوم الحياة

اللغة: العربية

مكان الجامعة: النجف

الصفحات الاولى:

المستخلص: تضمنت هذه الدراسة التحري عن الفعالية التضادية لجرثومة Bifidobacterium spp تجاه عزلات سريرية لجرثومة Staphylococcus aureus المقاومة للمثيسلين، ودراسة تاثير تلك المواد على عوامل الضراوة المنتجة من قبل S.aureus المقاومة للمثيسلين مثل الغشاء الحيوي Biofilm وا | This study included the investigation of Bifidobacterium spp antagonistic activity against Staphylococcus aureus isolates, and the effect of these antimicrobial agent on virulence factors produce by MRSA (Methicillin Resistance Staphylococcus aureus) such as Biofilm and Slime layer. One handered different samples were collected to isolate Bifidobacterium spp and 50 clinical isolates of Staphylococcus aureus from clinical specimens in AL - Najaf AL - Asharaf governorate during the period of (10/10/2013 - 20/1/2014) by the cultural characteristic colonies, microscopic for cells, biochemical tests and polymerase chain reaction PCR technique to detect 16SrDNA, the results showed that 13 isolates belong to Bifidobacterium spp and there are divergent gene content between these isolates and they have been bearing lm26/ lm3 gene. Carbohydrate fermentation test was used to distinguish the species of Bifidobacterium, the results revealed that the B.bifidum is more predominant than the other species; B.thermoacidophilum, B.adolescentis, B.breve, B.longum. Antibiotics susceptibility test to Staphylococcus aureus using antibiotic disc diffusion assay showed that Methicillin Resistant Staphylococcus aureus formed 70% and 30% of isolates were sensitive to the same antibiotics, also the ability of MRSA isolates to produce Biofilm and Slime layer was investigated by tube method and Congo red agar, then 10 isolates of Staphylococcus aureus were selected as efficient isolates according to the resistance of Methicillin and the high ability to produce biofilm and Slime layer. The antagonistic activity of Bifidobacterium spp was extracted and tested against these MRSA isolates, the results showed that the most isolates of Bifidobacterium spp were effective against Methicillin Resistant Staphylococcus aureus (MRSA), as well as the inhibition of growth and formation of Slime layer by using the wells and disc diffusion agar assay. The inhibition zone was between (10 - 30)mm, and the ability of bacteriocin production of Bifidobacterium spp against MRSA have been conducted by well diffusion broth method, B.bifidum3 was greater than other species in producing bacteriocin with asignificant increase (P<0.05). Furthermore the impact of bacteriocin production to inhibit the development and formation of biofilm was investigated, the results showed that the bacteriocin has ahigh activity against MRSA. The bacteriocidal and bacteriostatic effect of bacteriocin was conducted by using spectrophotometer, the results showed that these effects were bacteriostatic in the beginning of the growth MRSA while it was lethal during other time and 40 minutes is the period needed for killing MRSA bacteria.

عوامل الخطورة لطفرات الجينين CBS وMTHFR لقبل الارتعاج لدى النساء الحوامل في النجف == Risk Factors of CBS And MTHFR Gene Mutation For Preeclampsia In Pregnant Women In Al - Najaf

اسم المؤلف: زهراء سامي رزاق النجار

اسم المشرف: ظافرة جعفر عبد علي الفتلاوي | ماجد كاظم حسين

الموضوع العام: علوم الحياة

السنة: 2014

الموضوع الدقيق: الحيوان

الدرجة: ماجستير

الجامعة: جامعة الكوفة - كلية التربية - قسم علوم الحياة

اللغة: العربية

مكان الجامعة: النجف

الصفحات الاولى:

المستخلص: تعد الاصابة بقبل الارتعاجPre - eclampsia من الاعتلالات الخطيرة التي قد تظهر في الثلث الثالث من مدة الحمل اذ تتصف هذه الاصابة بارتفاع ضغط الدم وظهور بروتين الالبومين في الادرار. وقد ظلت اسباب نشوء هذه الحالة غير واضحة المعالم, اذ اعزيت بعض من اسبابها الى ا | Preeclampsia is considered as one of the serious complication in the third trimester of pregnancy. It is associated with hypertension and proteinuria. The causes of preeclamptic are still not well understood. Evidences suggested the involvement of metabolic related mutations in the disease. In the current study, the genetic mutations of CBS and MTHFR genes are studied as markers for the diagnosis of preeclampsia. Sixty preeclamptic pregnant women and forty healthy pregnant women as control group diagnosed by the physicians at Azzahra Teaching hospital for obstetrics &pediatrics in Najaf province from December 2012 to August 2013 The poly merase chain reactions technique was used to evaluate the incidence and frequency of C?S &MTHFR mutations. A questionnaire was conducted to obtain the information of the patients and the control group. Genetic mutation were detected by polymerase chain reaction (PCR)and agaros gel electrophoresis. The information indicated that the age of pregnant women, gestation age, previous history of the patients, family history and parity are involved in the pathogenesis of preeclampsia. The results of the present study of preeclampsia showed a significant increase (P ? 0.01) in patients (25 - 34) years old when compared with the other group. where the results found a significant increase (P <0.01) of Preeclampsia occurred during (33 - 39) weeks of pregnancy. And in the patients with previous history for preeclampsia there was significant increase (P<0.001) compared with healthy pregnants. Pregnants with preeclampsia in the family history showed significant increase (P< 0.01) as for women pregnant for the first time showed and significant (P<0.01) and constituted 8% pregnanst with preeclampsia who had diabetes mellitus. The extraction and quantification of cell free fetal DNA (cff DNA) revealed a significant (P<0.0001)increase in preeclamptic patients when compared with those of healthy pregnant women. It is confirmed by the use of an internal negative control through the monitoring of SRY gene (Y chromosome gene) amplification that the gene belong to the infant and 40 pregnant woman were followed up till the labor. Thus, 9 of them had delivered males, while 30 had delivered females. The wild type SRY gene band was obtained clearly from those of male delivery, but not from those of female delivery. Mutations of C?S gene were analyzed by theuse a primer intended to amplify a fragment of171 bp.The rate of mutation was found to be 51.7% and 5% in preeclamptic patients and healthy pregnant women respectively and Odd Ratio=20.31, P value=10 - 7. The C677T mutation of MTHFR gene was verified by the use of a primer designed to amplify a fragment of 198bp. The prevalence of mutation was indicated to be 68.3% and 17.5% in the preeclamptic patients and healthy pregnant women respectively and Odd Ratio =10.17, Pvalue =6.2*10 - 7. Results demonstrated the wide involvement of C?S and MTHFR gene mutation in the pathogenesis of preeclampsia, but they are no crucial for the development of the disease. In addition there are so many factors thatmay be involved in such development.