Antibacterial Activity of the Excretory/Secretory Products of Third Instar Larvae of SARCOPHAGA aegyptiaca against Different Bacterial Strains(SARCOPHAGA : DIPTERA)


Nancy Taha Mohammed , Doaa Hassan Abdel-Salam , Mohamed Salah Mohamed , Ahmed S. El-Ebiarie ,

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Volume 4 - February 2020 (02)


The present study fractionate the excretory/secretory products of third instar larvae of Sacrophaga aegyptiaca .The results revealed the presence of 35 protein fractions with different molecular weights ranging from 4.81 to 388.13 KDa in excretory/secretory products of third instar larvae of Sarcophag aaegyptiaca.Only 3 protein fractions (number 22, 23 and 24) showed antibacterial activity against two strains of gram positive bacteria (Streptococcus pneumonia and Staphylococcus aureus) and against two strains of gram negative bacteria (Pseudomonas aeruginosa and Escherichia coli) and these 3 protein fractions show different molecular weights . The separated protein fraction number 22 showed protein band at 41.16 KDa, separated protein fraction number 23 showed protein bands at 38.63 KDa and separated protein fraction number 24 showed protein band at 25.01 KDa. Also, the minimum inhibitory concentration was determined for each bacterial strain and it is similar in case of Staphylococcus aureus and Escherichia coli (1.95 µg/ml). The Minimum inhibitory concentration (MIC) for Streptococcus pneumonia is 7.81µg/ml and that of Pseudomonas aeruginosa is 31.25µg/ml. 


Sarcophagaaegyptiaca, Antibacterial activity, Gram +ve bacteria,  Gram -ve bacteria.



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