Time in Guyana. Guyana - current local time, summer/winter time, GMT offset, time conversion dates 2017, DST. 1  Current time in Guyana. 2  Time difference to GMT/UTC. 3  Daylight Saving Time 2017 (Summer Time) 4  Get Guyana Clock for your website. 5  Get Online Html Clock for cities in Guyana.
Viruses are tiny agents that can infect a variety of living organisms, including bacteria, plants, and animals. Like other viruses, the dengue virus is a microscopic structure that can only replicate inside a host organism.
1 Most viruses infect specific host cells ie are host specific. 2  Host specificity is due to: 3  specific attachment sites on the host cells called receptors. 4  Receptor sites for bacteriophage are found in bacterial cell walls or fimbrae or flagella.5  Animal cell membranes contain receptors for animal viruses. 20nm to 14000nm in size. 2  Most are smaller than bacteria (eg Adeno virus). 3  Vaccinia virus is the same size as the small bacteria like Mycoplasma, Rickettsia & Chlamydia. 4  Contain either DNA or RNA (never both) surrounded by a protein coat (capsid) and sometimes covered by an envelope.