Bacteriology is the study of bacteria.it is a branch of microbiology.now-a-days it is essential to understand bacteria as fast mutations are taking place in them and as a result drugs that once could easily destroy them or slow down their infection are now not working in the same manner.so this science "bacteriology" got in the limelight.if we closely look at this field we can find that it is important for us to know the characteristic,function,useful traits,mode of communication,etc.of this organism lying at the end of the food chain.though there are useful bacteria but as nature has its way of creating evil with good so in the case of bacteria there are both good and bad in contrast to we human beings.recently i suffered from typhoid caused by a bacteria and that one was categorised in the bad guys of the bacterial family.
As late as the mid-19th century, bacteria were known only to a few experts and in a few forms as curiosities of the microscope, chiefly interesting for their minuteness and motility. Modern understanding of the forms of bacteria dates from Ferdinand Cohn's brilliant classifications, the chief results of which were published at various periods between 1853 and 1872. While Cohn and others advanced knowledge of the morphology of bacteria, other researchers, such as Louis Pasteur and Robert Koch, established the connections between bacteria and the processes of fermentation and disease, in the process discarding the theory of spontaneous generation and improving antisepsis in medical treatment.
