Bacterial infections and noninfectious inflammatory conditions also may cause encephalitis. An infection may result in one of two conditions affecting the brain: 1  Primary encephalitis occurs when a virus or other infectious agent directly infects the brain. 2  The infection may be concentrated in one area or widespread. There are two types of herpes simplex virus (HSV). 2  Either type can cause encephalitis. 3  HSV type 1 (HSV-1) is usually responsible for cold sores or fever blisters around your mouth, and HSV type 2 (HSV-2) commonly causes genital herpes.
The wolf spider is often mistaken for a tarantula because it is similar in appearance. Wolf spiders are also mistaken for nursery web spiders, but wolf spiders do not spin webs and their bodies are more robust than nursery web spiders, which are generally thin with pointed rear ends.
This is a big family of big spiders. Some species are small but most are large: they range from 3-30 mm in body length. Female wolf spiders are often bigger than males of the same species. Like all spiders they have two body sections: the cephalothorax in front and an abdomen behind.The abdomen contains the digestive and reproductive systems, and on the underside of it are the glands where silk is produced.olf spiders live in all kinds of habitats, anywhere there are insects to eat. They seem to be most common in open habitats like grasslands, and are often found in farm fields and meadows. Most species stay on the ground, but a few climb up onto trees and other plants when hunting.