Because several different germs can cause encephalitis, spread of the infection may take place in different ways. For example, mosquitoes transmit viruses that cause West Nile encephalitis, St. Louis encephalitis, and western equine encephalitis.ncephaliti s may be caused by a variety of viruses, bacteria, and other organisms. These agents include:. 1  Measles, chicken pox, rubella (German measles), mumps, polio, and other viral illnesses, which generally lead to a mild form of encephalitis known as postinfectious or para-infctious encephalitis.
On average, the warmest days of the year in Seattle occur between July 26 and August 8, with average highs of 76 degrees. These are some of the best days to spend on some of Seattle's beaches. Alki Beach Park is open from 6 a.m. until 11 p.m.
1 On average sunlight hours in Seattle, Washington range from 1:56 per day in December to 10:09 for every day in July. 2  The longest day of the year is 15:46 long and the shortest day is 8:13 long.  The longest day is 7:33 longer than the shortest day.