TYPES OF PATHOGENS Flashcards
Types of Phatogens
BACTERIA
FUNGI
VIRUSES
PARASITES
PRIONS
One- celled microorganisms without a typical nucleus.
Bacteria
It contain both DNA and
RNA
Bacteria
Requires moisture and darkness to produce disease to human
Fungi
2 types of Fungi
Yeast
Molds
singe- celled
Yeast
multicellular
Molds
They are the smallest microorganisms known to produce in man.
Has either DNA or RN
Viruses
2 types PARASITES
Helminths
Protozoa
Abnormal proteins that infect
the nervous system, discovered
in 1983.
Prions
Cause irreversible brain
damage
No DNA and RNA
(PRIONS)
These are diseases that can affect
your skin, lungs, brain, blood and
other parts of your body .
Bacteria
- Are minute one- celled organisms without a typical nucleus.
Bacteria
- They contain both Deoxyribonucleic Acid (DNA) and Ribonucleic Acid (RNA)
Bacteria
Bacteria are classified according to
their shape, which may either be
• spherical (cocci),
• Oblong/ rod shape (Bacilli),
• spiral (spirilla) .
- They may be classified according to their divisional groups as diplococci (groups of two ), streptococci (chains )or staphylococcus (clusters )
Bacteria
are eukaryotic organisms that include microorganisms such as yeasts, molds and mushrooms .
FUNGI
exist in two forms, yeasts and molds.
FUNGI
reproduce by budding or spore formation.
FUNGI
They require moisture and darkness to cause diseases in humans.
FUNGI
Most infect the skin and scalp of humans and are difficult to
cure because they produce spores that remain under the outer skin
and reproduce even when environmental conditions are favorable .
Fungi
It is a submicroscopic infectious agent that replicates only inside
the living cells of an organism.
VIRUSES
infect all life forms, from
animals and plants to microorganisms, including bacteria and archaea .
VIRUSES
- Are minute microorganisms that cannot be visualized under an
ordinary microscope .
VIRUSES
- They are the smallest microorganisms known to produce disease in man.
VIRUSES
- The genetic material of this either DNA or RNA, but never
both.
VIRUSES
- must invade a host cell in order to survive and reproduce .
VIRUSES
These are a polyphyletic group of single-celled eukaryotes, either
free- living or parasitic, that feed on organic matter such as other
microorganisms .
PROTOZOA
- Are complex one celled microorganisms.
PROTOZOA
- They are often parasitic and can move from place to place by
pseudopod formation, by the action of flagella or cilia.
PROTOZOA
- Pseudopod movement is an amoeboid action in which one part of the cell is pressed forward and the rest of the cell rapidly follows .
PROTOZOA
- Flagella are whip like projections, cilia are hairlike projections on the exterior of the cell wall.
PROTOZOA
are abnormal infectious proteins that affect the brain and nervous system.
PRIONS
• Discovered in 1983 by Dr. Stanley Prusiner, who won a Nobel Prize for this discovery.
PRIONS
• Unlike other pathogens, it contain no DNA or RNA —only proteins.
PRIONS
• They have the unique ability to convert normal proteins into abnormal prions, leading to severe brain damage.
PRIONS
• Discovered ___ who ___ won a Nobel Prize for this discovery.
in 1983 by Dr. Stanley Prusiner,
• accumulate in the brain, forming clumps (plaques) that disrupt normal cell function.
PRIONS
• They trigger a chain reaction, turning healthy proteins into misfolded, infectious forms.
PRIONS
• This causes progressive degeneration of brain tissue, resulting in spongiform encephalopathy — a sponge - like
appearance of the brain.
PRIONS
• The body’s immune system does not recognize prions as foreign invaders, making them extremely hard to fight.
PRIONS
