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Bacteria are pathogenic microorganisms causing a number of diseases in humans from light to life threatening conditions.For proper treatment of patients infected with these diseases require proper diagnosis of diseases causing bacterial agent.As the bacteria are divided into two main as Gram Positive and Gram Negative Bacteria. Both type of bacteria exhibit a number of inherited biochemical properties by which we can differentiate, can check there presence and absence, can check their gram negative and gram positive nature. Therefore, the present review is focused to describe different biochemical tests in one article.

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We evaluated the growth performance and the hepatoprotective and antioxidant effects of curcumin against carbon tetrachloride (CCl 4)-induced liver injury in common carp Cyprinus carpio. A 10-week feeding trial was carried out. A basal feed was supplemented with 0 (control), 30, 60, 120 and 240 mg/kg curcumin to formulate five experimental feeds. At the end of the feeding trial, the growth performance was determined. Subsequently, CCl 4 was used for the model experiment. The plasma and liver were collected for the test after 72 h. Results showed that there was a significant (P<0.05) increase in weight gain rate (WG) and a special growth rate (SGR) of fish fed feeds supplemented with 60 and 120 mg curcumin kg-1. When fish were induced by CCl 4 after 72 h, fish fed the diet supplemented with 120 mg (P5) curcumin kg-1 had significantly (P<0.05) lower plasma GOT, GPT activities and MDA content and higher plasma TP content and activities of liver SOD, GSH, GSH-Px and plasma T-AOC than those of P1 group. Curcumin (120 mg kg-1 curcumin per feed) inhibited the damage of liver tissue structure caused by carbon tetrachloride and made liver tissue structure return to normal. Meanwhile, dietary curcumin supplementation could also increase the live Nrf2 mRNA level and Nrf2 protein level in the liver nucleus, and those of the P5 group were highest. Overall, the results indicated that appropriate dietary curcumin supplementation could enhance the growth (especially 60 and 120 mg kg-1 curcumin per feed) of common carp and effectively protect the liver against CCl 4 induced injury (especially 120 mg kg-1 curcumin per feed) in fish.

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