Do you want to publish a course? Click here

Isolation of Streptomyces sp. with antibacterial activity against some human pathogenic bacteria from soils of Lattakia city

عزل جرثوم المتسلسلة Streptomyces sp يمتلك خصائص مضادة لبعض الجراثيم الممرضة البشرية من ترب مدينة اللاذقية

1387   0   18   0 ( 0 )
 Publication date 2016
  fields Biology
and research's language is العربية
 Created by Shamra Editor




Ask ChatGPT about the research

Four isolates of Streptomyces sp., St.1 and St.2 were isolated from garden soil of science faculty, St.3 and St.4 were isolated from Al-Shameia soil Lattakia, by serial dilution on Starch Casein Agar medium.


Artificial intelligence review:
Research summary
تناولت الدراسة عزل أربع عزلات من جراثيم Streptomyces sp من تربتين مختلفتين في مدينة اللاذقية، سوريا. تم تقييم فعالية هذه العزلات ضد تسعة أنواع من الجراثيم الممرضة البشرية باستخدام طريقة الزراعة المتعامدة. أظهرت العزلة St.3 فعالية عالية ضد ثمانية أنواع من الجراثيم الممرضة، وتم تحديدها على أنها Streptomyces rimosus بناءً على الخصائص المورفولوجية والفيزيولوجية والكيميائية الحيوية. أظهرت العزلات الأخرى فعالية متفاوتة ضد الجراثيم الممرضة. أكدت النتائج أن التربة تحتوي على جراثيم Streptomyces التي يمكن أن تكون مصدرًا لاكتشاف مضادات حيوية جديدة.
Critical review
دراسة نقدية: تعتبر هذه الدراسة مهمة في مجال البحث عن مضادات حيوية جديدة، خاصة في ظل تزايد مقاومة الجراثيم للمضادات الحيوية التقليدية. ومع ذلك، يمكن توجيه بعض النقد البناء للدراسة. أولاً، كان من الممكن توسيع نطاق العينات المأخوذة من مواقع مختلفة للحصول على نتائج أكثر شمولية. ثانيًا، لم يتم التطرق بشكل كافٍ إلى الآليات الجزيئية التي تجعل العزلة St.3 فعالة ضد الجراثيم الممرضة، مما يفتح الباب لمزيد من الأبحاث المستقبلية. أخيرًا، كان من الممكن تضمين تجارب إضافية لتقييم سلامة وفعالية المركبات المستخلصة في النماذج الحيوانية قبل الانتقال إلى الدراسات السريرية.
Questions related to the research
  1. ما هي العزلة التي أظهرت أعلى فعالية ضد الجراثيم الممرضة البشرية؟

    العزلة St.3 أظهرت أعلى فعالية ضد الجراثيم الممرضة البشرية بنسبة 88.88%.

  2. ما هي الأنواع الجرثومية التي لم تتأثر بالعزلة St.3؟

    الجرثومة Acinetobacter sp لم تتأثر بالعزلة St.3.

  3. ما هو الهدف الرئيسي من الدراسة؟

    الهدف الرئيسي هو عزل جراثيم Streptomyces من التربة ودراسة خصائصها المضادة للجراثيم الممرضة البشرية.

  4. ما هي التوصيات التي قدمتها الدراسة لمزيد من الأبحاث؟

    التوصيات تشمل استخلاص المواد الفعالة من جراثيم Streptomyces rimosus ودراسة تأثيرها على أنواع جرثومية ممرضة أخرى، وإجراء أبحاث مستفيضة حول قدرة هذه الجراثيم على إنتاج المضادات الحيوية.


References used
ANANSIRIWATTANA W.; TANASUPAWAT S.; AMNUOYPOL S. and SUWANBORIRUX K. 2006, Identification and antimicrobial activities of actinomycetes from soils in Samed Island, and geldanamycin from strain PC4 – 3. Thia. J. Pharm. Sci., Vol. 30, pp. 49-56
ARAI, T. 1976, Actinomycetes, the boundary Microorganisms. Toppan, Tokyo, 123p
ARIFUZZAMAN M.; KHATUN M. R. and RAHMAN H. 2010, Isolation and screening of actinomycetes from Sundarbans soil for antibacterial activity. African Journal of Biotechnology, Vol. 9, No. 29, pp. 4615-4619
rate research

Read More

The antibacterial activity of Inula viscosa L. leaves extracts against some pathogenic bacteria, which were isolated from Al-Assad hospital laboratory in Lattakia, was tested by disc diffusion method. Results showed that water extracts had antibacte rial activity against all Gram positive and negative bacteria. The diameters of inhibition zones were between 9 mm against Pseudomonas aeroginosa and 41 mm against Proteus vulgaris. All Gram positive bacteria showed sensitivity to all organic extracts, so they had antibacterial activity, while Gram negative bacteria showed resistance to chloroform extract except for the one of Klebsiella pneumoniae with an inhibition zone of 12 mm, and resistance for dichlormethan extract except for Pseudomonas aeruginosa with an inhibition zone of 15 mm. there was resistance for diethyl extract except for Serratia marcescens with an inhibition zone of 32 mm. Ethyl acetate extract had antibacterial activity against all bacteria. Ethanol, methanol and acetone extracts showed antibacterial activity against all bacteria except for Escherichia coli with an inhibition zone of 10 mm. This study indicated that water and organic Inula viscosa L. leaves extracts had antibacterial activity against pathogenic bacteria which also was tested, especially water extract, ethanol, methanol, ethyl acetate and hexane extracts. So the Inula viscosa L. leaves extracts may be sources for natural antibiotic in future.
Pyocyanin was extracted from cultures of Pseudomonas aeruginosa, which was isolated from sea water by chloroform. Results study the effect of pyocyanin against human pathogenic bacteria, which were isolated from Al-Assad hospital laboratory in La ttakia, with disk diffusion method showed that pyocyanin has antibacterial activity against Gram- positive bacteria.
Inhibition activity of extracts (acetone, ethanol, water) parts of the (Myrtus communis L.) (root, stem, leaves, fruits) with concentrations (25,50,75,100%) was carried out against growth of Gr- and Gr+ bacteria which were isolated and identified from the pathogenic specimens of The University Children's Hospital bacterial laboratory in Damascus, using agar well diffusion method on Mueller – Hinton medium.
Activity of Ziziphora tenuior L. leaves organic extracts against four pathogenic bacteria, which were isolated from clinical samples and prepared from Al-Assad hospital laboratory in Lattakia, were tested by disc diffusion method through 2014. Res ults showed that Ziziphora tenuior L. leaves extracts have antibacterial activity against all Gram positive and negative bacteria. Inhibition zones were recorded between 9mm against Pseudomonas aeruginosa and 44mm against Staphylococcus aureus at concentration of 200mg/ml for the methanolic extract. Whereas the inhibition zones for the ethanolic extract were recorded between 7mm at concentration of 40mg/ml against Streptococcus sp. and 34mm at concentration of 200mg/ml against Staphylococcus aureus. These results represent the importance of Ziziphora tenuior L. as a source of natural substances counteraction of pathogenic bacteria.
This study was conducted at the laboratory of Food Science Department, Agriculture College, Damascus University to isolate and characterize of Lactobacilli bacteria from some Syrian foods and detection the effectiveness of anti-pathogenic bacteria l growth. Lactic acid bacteria from different dairy products, pickles and dried plant samples were isolated and identified according to common characteristics. Results showed that twenty-three isolates were rods while only 2 of the them were coccid. These isolates were tested for their antimicrobial effect against pathogenic bacteria for both gram positive bacteria (Staphylococcus aureus) and gram negative bacteria (Klebsiella pneumonia and Escherichia coli). Fifteen isolates demonstrated antimicrobial effect against the three tested bacteria, of which CP50 and CP46 isolates showed the best antimicrobial effect. Results of the standard physiological and biochemical tests identified fourteen isolates as Lactobacillus plantarum and one isolate as Lactobacillus fermentum.

suggested questions

comments
Fetching comments Fetching comments
Sign in to be able to follow your search criteria
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا