Aqa b1a 11.4_disease_pics_rg[1]

Diseases

How they affect us

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

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

Bacteria

This is a pin prick with bacteria growing on it

These are rod shaped bacteria

Structure of bacteria

Bacteria produce toxins – poisons –that make us feel ill

Viruses – these are much smaller

Virus invade body cells and then hijack the cells DNA to reproduce – massive cell damge can be caused

• Chicken pox

Shingles

shingles

Rubella

or

German measles

Mumps

Athletes foot

Cold sore

Herpes

Small pox – a killer

Polio

Warts

Verruca

verruca

Ulcers

Ulcer

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