Diseases can be acquired through genetic, microbial, or parasitic means, with pathogens such as bacteria and viruses being the most common causes. Bacteria can thrive outside host organisms and produce toxins, while viruses require host cells to reproduce, often causing significant cell damage. The document lists various viral and bacterial infectious diseases, highlighting examples like AIDS, chicken pox, and tuberculosis.

1. Diseases
How they affect us

2. Disease are acquired by:
• Genetic causes – inherited from parents
• Microbial – infection from a virus, bacteria or
fungus
• Parasitic - catch an organism that causes
disease condition –
e.g. malaria – protozoa,
thread worm
crab lice

3. Disease pathogens - microbes
• Bacteria and viruses are the most common of
disease pathogens
• Bacteria can survive outside of the host
organism
• Viruses can only survive and reproduce within
a host cell

4. Bacteria
This is a pin prick
with bacteria
growing on it
These are rod
shaped bacteria

5. Structure of bacteria
Bacteria produce toxins –
poisons –that make us feel ill

6. Viruses – these are much smaller
Virus invade body cells and then hijack the cells DNA
to reproduce – massive cell damge can be caused

7. • Chicken pox

8. Shingles

9. shingles

10. Rubella
or
German
measles

11. Mumps

12. Athletes foot

13. Cold sore

14. Herpes

15. Small pox – a killer

16. Polio

17. Warts

18. Verruca

19. verruca

20. Ulcers

21. Ulcer

22. A few diseases – wikipedia linked
• Viral infectious diseases
• AIDS – AIDS Related Complex – Chickenpox (Varicella) – Common cold –
Cytomegalovirus Infection – Colorado tick fever – Dengue fever –
Ebola haemorrhagic fever – Epidemic parotitis –
Hand, foot and mouth disease – Hepatitis – Herpes simplex – Herpes zoster –
HPV – Influenza (Flu) – Lassa fever – Measles – Marburg haemorrhagic fever –
Infectious mononucleosis – Mumps – Poliomyelitis –
Progressive multifocal leukencephalopathy – Rabies – Rubella – SARS –
Smallpox (Variola) – Viral encephalitis – Viral gastroenteritis – Viral meningitis
– Viral pneumonia – West Nile disease – Yellow fever
• [edit]
• Bacterial infectious diseases
• Anthrax – Bacterial Meningitis – Brucellosis – Campylobacteriosis –
Cat Scratch Disease – Cholera – Diphtheria – Epidemic Typhus – Gonorrhea –
Impetigo– Legionellosis – Leprosy (Hansen's Disease) – Leptospirosis –
Listeriosis – Lyme Disease – Melioidosis – MRSA infection – Nocardiosis –
Pertussis (Whooping Cough) – Plague – Pneumococcal pneumonia –
Psittacosis – Q fever – Rocky Mountain Spotted Fever (RMSF) – Salmonellosis
– Scarlet Fever – Shigellosis – Syphilis – Tetanus – Trachoma – Tuberculosis –
Tularemia – Typhoid Fever – Typhus; Urinary Tract Infections