VIRUSES PATHOGENIC MICRO- ORGANISMS


Many diseases are caused by particles and organisms that we never get to see, yet the effects can be lethal.

Some diseases caused by viruses

smallpox, rabies, poliomyelitis, measles, warts, fever, influenza, common cold,

chickenpox, mumps, viral meningitis, encephalitis, conjunctivitis. Shingles...

Some of these diseases are spread by contact (contagious) others by merely inhaling

the pathogen floating around on dust particles (infectious), in moist droplets or insect carriers.


BACTERIA


Bacteria are classified on the basis of their shape and whether they occur singly or in groups. The shape formed when in groups is another criterion for classification.

Round bacterium = coccus

Cocci occurring in pairs = diplococcus

Streptococcus (like a strap) :

Staphylococcus (stacked) -



CocciVarious.jpg



Bacillus -

Bacilliflagellated.jpgstreptobacillus.jpg


Spirillum

spirillum.jpg



Some Bacterial diseases

Coccal

Acne and pimples - staphylococcus ; sore throat - streptococcus ;

pneumonia - pneumococcus (streptococcus) or staphylococcus

meningococcal meningitis, gonorrhea
Find more diseases caused by cocci and

research MRSA (mersa) Multi-drug Resistant Staphylococcus aureus / Methicilin Resistant Staphylococcus aureus

Methicillin is deemed to be the ultimate drug against S.a. thus, if resistant to Meth, it is deemed to be resistant to all other drugs.

MRSA the flesh-eating bacterium ................Damage caused by MRSA
mrsaBacteria.jpgStaph-aureus.jpgMersa.jpg



Basilli
Tuberculosis, plague, food poisoning, tetanus, typhoid fever,

Spirilli
Syphilis, vaginitis,

Conditions that favour bacterial growth
Warm, moist places with enough nutrients and a minimum of light. Most of the pathogenic bacteria live anaerobically and some may even die in the presence of an abundance of oxygen.