Viruses+and+Bacteria+-+Pathogens

=__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) -



__Bacillus__ -



Spirillum



__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

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

Syphilis, vaginitis,
 * Spirilli**

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.