In this article we will discuss about the transmission of disease by vectors. There are three different kinds of transmission for the spread of various diseases: (a) Direct transmission: In this case the transmission of disease is occurred through close contact i.e. transferred from man to man through close contact, e.g., scabies. (b) Mechanical transmission: In this method, the disease-agent [...]
In this article we will discuss about the mites and ticks as vectors. 1. Mites: Mites surpass all other Arachnids in numbers and they are very small sized Acarines. There is a great variety of body form in the Acarina, some appearing grotesque. The majority are more or less round or oval without division into head, thorax and abdomen, but [...]
In this article we will discuss about vectors used in genetic engineering. Cloning Vector: By cloning, one can produce unlimited amounts of any particular fragment of DNA. In principle, the DNA isolated and cut pieces are introduced into a suitable host cell, usually a bacterium such as Escherichia coli, where it is replicated, as the cell grows and divides. However, [...]