Parasite

Parasitism, a symbotic relationship, involves a species of organism (parasite) that infects a host species and depend on the host for nutrition and other basic metabolic needs. In highly evolved types of parasitism, minimal damage may be done to a host population, except that less-fit or disabled members may be weeded out. At the other end of the spectrum, highly virulent parasites cause diseases, such as rabies, and are referred to as pathogens.

Almost every life-form is affected by parasitism. Even bacteria are infected by certain viruses known as bacteripages. Many parasites cause considerable agricultural damage. Tapeworms, which live in gastroinestinal tract, are among the parasites that cause human illness.

Some parasitic diseases more detail describe on http://bacteria.health-tips-diseases.com

Viruses Causes Herpes

There are two kind of viruses that can causes herpes simplex. Herpes simplex type 1 (HSV-1) and herpes simplex virus 2 (HSV-2). The first type is related to the infection usually on the lips, mouth and face. This viruses often attack to children. HSV-1 often causes lesions inside the mouth such as could sores (fever blisters) and transmitted by contact with infected saliva.

While herpes type 2 or causes by HSV-2 is sexually transmitted diseases. The symptom of this disease include of genital ulcer or sores. Then merge a genital lesions, this virus can also lead to complications such as meningoencephalitis (infection of the lining of the brain and the brain itself) or cause infection of the eye, in particular the conjunctiva, and cornea. However, some people have HSV-2 but do not display symptom.