A vaccination is a treatment which makes the body stronger against a particular infection. The body fights infections using the immune system, which is made up of millions upon millions of cells including T cells and B cells.
Pink eye in cattle, medically known as infectious bovine keratoconjunctivitis, is a contagious bacterial infection of the eye. Cattle pink eye is different from human pink eye, which, although usually infectious, is not highly contagious. Pink eye in cattle also looks clinically different and is usually much more severe than the disease in humans. Pink eye in cattle is most commonly caused by a bacterium called Moraxella bovis. This crafty microbe uses tiny hair like structures called pili to attach to the white part, or the conjunctiva, of the eye and cause damage.
Pinkeye is a painful cattle disease that can cause reductions in weaning weights of as much as 17-65 lbs./animal. Once pinkeye begins to spread through a herd, it's very difficult to contain and control. Face flies play an important role in the spread of pinkeye, as the irritated eye produces excessive tearing that attracts the pests. Face flies then pick up the causative agent of pinkeye and transfer it to other animals. In comparison to horn flies, face flies actually spend very little time on the animal.