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Site author Richard Steane
The BioTopics website gives access to interactive resource material, developed to support the learning and teaching of Biology at a variety of levels.



Viral diseases

i.e (human) diseases caused by infection by a virus
Disease Caused by (Signs) and Symptoms Control/prevention spread by
Common cold
(upper respiratory system infection)
rhinovirus (many forms) and coronavirus (and others) scratchy throat, sore throat, nasal congestion, runny nose, sneezing, (cough, fever) - more pronounced in young children Cold medicines should relieve symptoms (lowering temperature, etc) but there is no vaccine air droplets (aerosols) from sneezes, coughs, etc or by contact
-contagious for the first 2 to 3 days, usually not after the first week.
Flu
(upper and occasionally lower respiratory system infection)
influenza virus chill, fever, sore throat, muscle pains, headache, cough, fatigue, general discomfort
More serious than the (common) cold
  • Trivalent influenza vaccine (TIV) - needs reformulating each year as influenza virus evolves rapidly, and new strains quickly replace the older ones.
  • Antiviral drugs e.g. Tamiflu, Relenza) are quite effective.
  • Handwashing and disinfection of surfaces is also important.
  • Paracetamol may relieve symptoms e.g. fever and muscle aches.
air droplets (aerosols) from sneezes, coughs, etc or by contact with contaminated surfaces
Mumps "mumps virus" swelling of salivary glands, headache, fever, inflammation of testes (more important in teenagers and adults) Mumps vaccine (part of MMR and MMRV* vaccines) airborne droplets (aerosols) from sneezes, coughs, etc or by contact with surfaces

very easily spread in university/college scenarios
Measles
(also called rubeola, not to be confused with rubella)
morbillivirus respiratory system infection, fever, cough, runny nose, red eyes, skin rash. Measles vaccine (part of MMR and MMRV* vaccines) airborne droplets (aerosols) from nose and mouth, etc or by contact

serious disease in some under-developed countries
Rubella ("German measles") rubella virus minor flu-like symptoms and rash but if a woman is pregnant it can cause deafness, eye abnormalities, and congenital heart disease in baby Rubella vaccine (part of MMR and MMRV* vaccines) airborne droplet emission from the upper respiratory tract
Chickenpox varicella zoster virus
see below
skin rash, muscle pain, nausea, fever, headache, sore throat, pain in both ears, complaints of pressure in head or swollen face, and malaise in adolescents and adults varicella vaccine (part of MMRV* vaccines) airborne - coughing or sneezing or through direct contact with secretions from the rash.
Shingles varicella zoster virus reactivation after chickenpox infection - perhaps years before - virus travels down nerve to skin painful, sensitive, tingling or burning skin eventually turning into a rash of red spots, fever, headache and enlarged lymph nodes.
  • Antiviral medicines: acyclovir ACV (Zovirax)
  • Symptom control: Painkillers, calamine lotion against itching.
Shingles rash can spread chickenpox if touched so no sharing towels, swimming, or contact sports.
(HIV/AIDS)
Acquired ImmunoDeficiency Syndrome
Human immunodeficiency virus progressive failure of the immune system allowing development of life-threatening opportunistic infections e.g. pneumonia and cancers
  • use of condoms (protected sex)
  • (new) disposable syringes and needles
  • multiple antiviral treatment now much more effective at extending life expectancy, but not preventing infectiousness
  • screening of blood and products
  • no vaccine
transfer of body fluids: blood, semen, vaginal fluid, pre-ejaculate, or breast milk
using non-sterile syringe needles (drug addicts or insecure health service)
(HPV) Human papillomavirus (many types) Small genital and other warts: may be insignificant (both sexes)
- may lead to cancer within the reproductive system, especially cervical cancer in females (major cause of cervical cancer)
  • HPV vaccine - now administered to teenage girls in UK and USA - not effective against existing infections
  • condoms
  • microbicides
sexual activity, including oral sex
Oral Herpes
Genital Herpes
(other forms)
Herpes simplex virus Blisters (cold sores) on lips, genitals (other parts of the body may be infected) condoms
antivirals: acyclovir ACV (Zovirax)
Skin-to-skin contact especially with active lesion or body fluid
Infection remains and can be reactivated (depending on health?)
* not normally given in UK

Things to research

How common is the common cold?

How much worse are smokers affected with colds than non-smokers?

(In the context of influenza) What is the difference between an epidemic and a pandemic?

What does H5N1 mean?

Avian (bird) flu

Swine flu

Past outbreaks of flu (often with geographical associations)

Death rates from these diseases in the western world and in developing countries.

Vaccination rates against these diseases in the westerm world and in developing countries.

Incidence of mumps before and after vaccine development (1967? and MMR 1988), and since 1988 when doubts about the MMR vaccine were raised by Andrew Wakefield - now discredited.

% coverage (immunisation) of population over this time

Find out if you have had the MMR vaccine (and the follow-up booster shot).

Measles - mortality in UK/ USA and in sub-Saharan Africa

There are many other human viral diseases.
Find out about one that has a name that starts with the same letter as your surname!


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