هدفت هذه الد ا رسة لاختبار تاثير بعض ظروف النمو على الفاعلية التثبيطية لبكتيريا Lactobacillus delbrueckii و L.fermentum على نمو بكتيريا E.coli وقد دلت نتائج د ا رسة اختبار الفاعلية التثبيطية
للعزلتان البكتيريتان Lactobacillus delbrueckii L.fermentum , ضد العزلة البكترية E.coli المستخدمة في هذه الد ا رسة عند الت ا ركيز المختلفة 100,90,70,50) ( % بان عالق العزلتان البكتيريتان
Lactobacillus delbrueckii و L.fermentum عند التركيز % 100 اعطى اعلى فاعلية تثبيطية ضد
بكتريا E.coli حيث بلغ معدل قطر منطقة التثبيط 27 ملم , بينما بلغ معدل قطر منطقة التثبيط 17 ملم عند
التركيز %50 كفاعلية تثبيطية لعالق العزلتان البكتيريتان ضد بكتريا E.coli عند استخدام طريقة الحفر, في
حين ان ا رشح العزلتان البكتيريتان Lactobacillus delbrueckii و L.fermentum عند التركيز %100
اعطى منطقة تثبيط قطرها 23 ملم . عند د ا رسة ثباتية البكتريوسين تجاه التغاير في قيم الاس الهيدروجيني ,
اظهرت النتائج ثباتية البكتريوسين المنتج عند قيم الاس الهايدروجيني الحامضي من خلال قطر منطقة التثبيط
لبكتريا E.coli 22 ملم في حين انها بلغت 17 ملم عند قيم الاس الهايدروجيني القاعدي . في حين ان نتائج
اختبار تاثير كل من الملحين NaCl و KCl عند التركيزين 1 و 5 % في فاعلية البكتريوسين بينت ان
فاعليته التثبيطية ضد بكتيريا E.coli كانت اعلى عند الت ا ركيز الملحية الواطئة 1% مقارنة بفعله عند الت ا ركيز
الملحية العالية % 5 من خلال نتائج اقطار مناطق التثبيط والتي كانت 16 و 18 ملم لكل من الملحين Nacl و Kcl عند التركيز 1 % على التوالي في حين انها انخفضت الى 14 و 15 ملم لكل من الملحين Nacl و
Kcl عند التركيز % 5 على التوالي . كما بينت النتائج ثباتية الفعل التثبيطي للبكتريوسين المنتج من قبل
بكتريا Lactobacillus عند درجة الح ا ررة 37 º م في حين انه انعدم عند درجة الح ا ررة 25
The inhibitory effect concentrated filtrate of local Lactobaciilus
gasseri against Candida albicans and Trichophyton mentagrophytes, T ruhrum and Aspergillus flavus which were isolated from infected cases in human beings, tested using two methods :well diffu ion and
Mixed with the mold medium (Sabouraud agar).
The results showed that the concentrated filtrate of L. gasseri have
inhibitory effect against Cundida ulbicans, the inhibition zone was 13 mm. As well as, the concentrated tiltrate inhibited, considerably Trichophyton mentagrophytes,
... Show MoreInhibitory effect of Lactobacillus plantarum was studied against Escherichia coli O157:H7 in minced beef , as well as the effect of some Spices ( Garlic , Cloves and Black Pepper ) was studied against this bacteria . Plate count method was used to estimate the viable cells of E. coli O157:H7 in the treated meat samples for incubation periods( 0 , 24 and 48) h. Results showed that Lactobacillus plantarum had inhibitory effect against E. coli O157:H7 , when reducing the number of cells after 24, 48 h., and reached to Zero after (24) h. As well as Spices in this study had inhibitory activity against E. coli O157:H7 .Garlic had
... Show MoreThe Inhbititory effect of cocentrated and non-cocentrated supernatant of the probiotic Lactobacillus salivarius against growth of some potential pathogenic microorganisms which included Pseudomonas eruginosa, Klebsiella spp, Escherichia coli and Candida albicans. The results were diffusion assay revealed that concentrated and non-concentrated supernatant had inhitory effect against pathogenic bacteria with inhibition zone renged between 13-17mm while inhibition effect of concentrated supernatant against C.albicans was inhibition zone 8mm. On the other hand, the effect of these suprnatant against biofilm formation of the tested microorganisms was studied. The result showed that the concentrated supernatant had inhibitory effect on biofil
... Show MoreIn this study Candida speices was diagnosed in 26 swab samples from patients with denture stomatitis , investigates the antagonism activity of Lactobacillus was investigated against the yeast of Candida albicans in vitro.Results revealed that The inhibition effect of Lactic Acid Bacteria against C.albicans was examined in solid medium, L.plantarum gave higher inhibition average 11mm followed by L.acidophillus with average 9 mm and, L.fermentum , L.casei with averages 7 mm. Whereas the filtrates, the highest inhibition zone were 20 and 16 mm by L. plantarum and L.acidophillus, respectively.
Saccharomyces cerevisiae filtrate showed inhibitory effect against Fusarium spp. when grow in a liquid medium (Sabouraud) with different concentrations (1, 3, 5) %. The higher inhibitory effect against fungus growth was (24.5) mm at (5%) in PDA medium compared with control (36.5) mm during the seventh day propagation. The filtrate of Lactobacillus plantarum isolate was mixed with the PDA medium ,which showed inhibitory effect against Fusarium spp. The concentrated filtrate( one fold) appcarcd a higher effect against the same fungus compared with un concentrated filtrate one. Saceharomyces cerevisiae and Lactobacillus plantarum
... Show MoreABSTRACT
The effect of adding raw bacteriocin produced by Lactobacillus bulgaricus to cheese curd at an amount of (5 and 10 and 15) mL/kg cheese as a biological preservative to prolong the shelf life of soft cheese, in addition to the control treatment, knowing that each 1 mL of bacteriocin filter contains 15 units/ mL of bacteriocin. The results of the physicochemical, microbial and sensory tests for cheese stored at refrigerator temperature for a period (zero) to (21) d of adding bacteriocin showed the superiority of the treatment of cheese added to 15 mL/kg cheese of bacteriocin over the rest of the other treatments during the storage period, wh
... Show MoreBackground:Lactobacillus fermentum selected as an alternative treatment to prevent or treat urogenital infection based on their probiotics properties and production of bacteriocins.
Objective: The present work was done to study the inhibition activity of L. fermentum cell free supernatant against urogenital pathogens Enterococcus faecium and Enterococcus faecalisinvitro.
Materials and methods: L.fermentum isolates have been collected from vaginal swabs . A supernatant of these isolates has been prepared and its antibacterial activity against 3 isolates of E.faecium and 3 isolates of E.faecalis has been studied.
Results: Different concentrations have been prepared and the most effective one was 1000μg/ml and the most affected is
Thirty- five vaginal swab samples were obtained from women vagina.All samples
were subjected to conventional morphological and cultural characteristics, isolates
distributed between Lactobacillus acidophillus(23)and Lactobacillus fermentum (12).
Antibacterial activities were done by well diffusion and blank disk method. The
Lactobacillus was used as aprobiotic treatment against bacteriaisolates from vagina
.The isolated bacteria had strong activity against indicator strains.The results showed
that Lactobacillus which was isolated from vagina by well diffusion method was
effective against pathogenic isolates more than the Lactobacillus isolated by blank
disc method , the highs inhibitory effect of Lactobacillus iso
Ten isolates belong to the Staphylococcus bacteria from different clinical swabs were taken from patients in Ibn al-Nafis Hospital and Central Public Health laboratory, according to many morphological and biochemical tests that used to identify bacterial species S. aureus, the results showed that 8 isolates when investigated their ability to produce a slime layer using Congo red agar method the results showed that SA5 isolate was the best compared to other isolates through change the color of colonies to the pink and Congo red agar -colored Black.
When examining the inhibitory effect of grapefruit extracts in the growth of isolated bacteria SA5 S.aureus, results showed that the aqueous extract of the seeds at different concentrations
Background: The effect of garlic extracton fungal
growth and keratinolytic activity was studied in
Trichophytonmentagrophytes as one of the major
etiologic agents of human and animal dermatophytosis
in Baghdad and other parts of the World.
Objective: To investigated an alternative
antidermatophyte with minimum side effects which is
plant based and biodegradable natural product
Methods: Culture conditions for 30 isolates of T.
mentagrophytes isolated from human dermatophytosis
from both sexes with ages of 5-63 years in Central
Medical city for the period July 2009 to October 2009
were cultured on specific solid medium.
Results: The aqueous extract of garlic at various
concentrations inhibited the