Evaluation of antibacterial activity of tetracycline and cephalexine decomposed by sunlight

الملخص EN

Very little is known about the factors affecting the behavior, degradation and persistence of Tetracycline & Cephalexin in the south of Iraq, studies conducted for the first time of these antibiotics behavior by using the nature sunlight and also conducted using distilled water as control.

Both of these antibiotics have the same method of actions and effectiveness but the inhibition zone of both compounds are smaller than the control.

The antibacterial activities by using E-coli & Staphylococcus Sp were tested against this isolation by disc diffusion method.

It was found that the effect of the UV Sunlight which converts the antibiotic compounds to unknown different species.

It was noticed that the inhibition zone of the Tetracycline is significantly smaller than the Cephalexin that is because of the degradation of Tetracycline by sunlight which was faster than the Cephalexin.

We suggest that the storing of these kinds of antibiotics should be in a cool place and not exposed to sunlight at all.