Ch. 5 Microbiology Basics Flashcards
(21 cards)
Disease
Failure of the body to function normally.
Pathogens
Disease producing microorganisms.
Infection
Invasion of a body by a pathogen.
Normal Flora
•bacteria high usually lives in the body & stays within a specific population.
Bacilli
Rod shaped cells
Cocci
Round cells
Diplococci
Double cells
Streptococci
Chain cells
Staphylococci
Bunch of grapes
Curved rods
Have a slight curvature
Spirillum
Corkscrew like
Spirochetes
Wavy shaped
Rickettsia/chlamydia
- Only live inside cell.
- Smaller.
- Considered parasites.
Viruses
- tiny compared to bacteria
- contain nucleic acid(rna/DNA) but lack ability to perform protein synthesis.
- can only reproduce within living cells.
- not usually susceptible to antibiotics.
Fungi
-plant like
-much larger than bacteria
-grow in dark,damp places
-single cell fungi=Yeasts
-fuzzy,filamentous forms mold
-mycotic infections
(Ex. Ringworm , athletes foot, thrush)
Protozoa
-larger than bacteria
-one cell organisms
-found in soil & water
-(4)main divisions
•amebas
•ciliates
•flagellates
•sporozoa
Parasitic worms
- Helminths
- intestinal round worms
- pinworms
- hookworms
- other round worms
Arthropods
- mites & lice = ectoparasites
- mosquitos , fleas, ticks act as vectors
- fomites= nonliving vectors
- humans end up as host
Looking at Bacteria
- single cell
- cell wall
- form spores
- grouped by shapes
Single celled organisms
- viruses consists of DNA or RNA w/protein shell
- viruses only reproduce with a host
- fungi cost mycotic infection
- Protozoa are single celled animal like microbes
Multicellular organisms
-worms (round or flat) •transmission by fecal-oral route -Arthropods •animals with jointed legs •ectoparasites &vectors