Multidimensional world-wide developments in most areas have resulted into pollution of the environment. Municipal wastes, industrial effluents and heavy metal discharge have contaminated our aquatic ecosystem, as well as, the fish population and associated bacterial species in such environment. In the present study a fresh water fish, Channa punctatus, was exposed to Lead and further an opportunistic bacteria namely Aeromonas was isolated from various fish organs. This bacterium was further studied at various biochemical parameters to understand its characteristic features. This study will...

Toxins can be defined by many ways on basis of origin, chemical nature and site of actions. Any microbial product, when present at low concentration in cells or tissues of a higher organism, can cause injury by interfering with the structural and functional integrity of those cells or tissues. Toxins are produced by bacteria, fungi, algae and various other micro-organisms. This review will put some light on various types of microbial toxins their structure and function and how they affect the human body. The book is of benefit to all the students of microbiology, biochemistry medical science,...