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ability of pathogen to gain entry to host tissue and bring about disease |
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"full of poison"
DEGREE to which a pathogen causes disease |
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a cells whose genetic material is not enclosed in a nuclear membrane |
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a cell having DNA inside a distinct membrane-enclosed nucleus
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Binomial Nomenclature species |
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the system of having two names
(Clostridium tetani) |
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a group of closely related species
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refers to a species in singular-
uknown species of a known genus
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refers to a species in plural
refers to all members of a genus |
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indentified by numbers, letters or names that follow species
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group of organisms all derived from a single parent cell |
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Single Cell
(circle form) |
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the glycocalyx is organized and formly attached tothe cell wall forming thick layer outside of the cell |
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Definition
Long whip like structure for motility |
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Definition
spirochetes move by means of axial filaments |
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Definition
short, straight projections for attachment involved in biofilm formation that allow attachment to a host |
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Definition
longer, one--two per cell for transfer of the DNA in mating process
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a survival form of bacteria produced within the cell in response to adverse environmental conditions |
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Study of cause of disease |
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Definition
state were host harbors microbes that survive and multiply in body tissue |
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Definition
process or even that results in any change from the general state of health |
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develops rapidly and last a short period of time |
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Definition
develops slowly, lasting a long time |
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1st pathogen to infect a body part |
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infection of a body part by a 2nd pathogen |
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a disease of animals that can be transmitted to humans |
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Vectors
(mechanical and biological) |
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the study when and where diseases occur and how they are transmitted and occurence |
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dissolves collagen; softens tissue so it can spread |
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Definition
kills white blood cells; decreases hosts resistance |
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Definition
causes hemolysis
(lysis of red blood cell) |
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Term
Hemolysis:
alpha
beta
gama |
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Definition
alpha--partial : greenish zone around colony
Beta--complete hemolysis--clear, odorless zone around colony
Gama- No hemolysis |
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Term
5 baisc groups of Microbes |
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Definition
- Fungi
- Protozoa
- Virsuses
- bacteria
- algae
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Term
beneficial effects of microbes |
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Definition
- oxygen (from the ocean 50%)
- food
- soil microbes break down waste
- microbes in intestines for digestion
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Definition
- 1st person to observe microbes through magnifying glass
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Definition
made first Electron microscope |
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Definition
hospitals needed to wash hands |
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first to cultivate anthrax |
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classification of microorganisms |
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Definition
- Highly virulent
- moderatly virulent
- avirulent
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Prokaryotic and Eukaryotic similarities |
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Definition
- both have membranes
- both use DNA to encode genetic material
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What do prokaryotic cells lack? |
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Definition
internal membrane-enclosed organelles |
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Characteristics of Prokaryotes |
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Definition
- unicellular
- contains one circular chromosome
- no nucleolus
- lacks membrane-enclosed organelle
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Definition
- Contains polyssacharide peptidoglycan
- has flagella
- No cilia
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Definition
- cell wall is chemically simple
- may have cilia or flagella
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Definition
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mitochondria and chloroplast have how many ribosomes? |
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Definition
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what does the THREE DOMAINS consist of? |
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Definition
- two prokaryotes
- one eukaryotes
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What are the THREE DOMAINS? |
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Definition
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Classifications of THREE DOMAINS? |
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Definition
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Archaea--live in extreme habitates, bacteria-like
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Bacteria--cell wall have peptidoglycan
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eukarya--all ekaryotic organisms
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Definition
- Prokaryotic
- have cell wall
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Definition
Spherical
pairs=diplococci |
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long spirilla with many tight coils |
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Definition
substance that surrounds cell |
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what is the glycocalyx made of? |
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Definition
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Function of Bacterial Capsule |
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Definition
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enables bacteria to resist phagocytosis by host defense cells
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allows some bacteria to adhere to surfaces and colonize and resist flushing
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prevents cell from dehydration and chemicals and loss of nutrients
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Definition
a microbial community that forms a slimy layer on a surface |
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CDC says biofilms are involved in what percentage of all human bacterial infection? |
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Definition
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Definition
- Resist disinfectants
- resist anti-biotics
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Bacteria that lack flagella are called? |
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Definition
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4 types of arrangements of flagella |
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Definition
- monotrichous- single
- amphitrichous-single and both ends
- lophotrichous-two or more at one or both ends
- peritrichous- all over cell
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Term
Gram positive characteristics |
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Definition
- layers of peptidoglycan
- teichoic acids= alcohol and phosphate (function as antigen)
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why is it important to know gram + from gram - ?
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Definition
to choose the best control method |
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characteristics of Negative cell wall |
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Definition
- one or few peptidoglycan and outer membrane of protein and fat
- no teichoic acid
- lipplyssacharide in outter membrane
- lipoproteins and phospholipids too
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Definition
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Definition
agent that fixes the stain to cell |
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if iodine present in gram staining? |
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Definition
cells become darker violet |
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countersaint name and color? |
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Definition
- Safranin
- turn reddish-pink or remain purple
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Definition
the phospholipids that are arranged in two parallel rows |
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Definition
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Definition
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Definition
- bacteria that contain circular, double-stranded DNA
- small loops of extrachromosomal DNA
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Definition
- carry genes for virulence or drug resistence
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Definition
process of endospore formation within a vegitative cell |
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Definition
endospore returns to its vegitative state |
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Term
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Definition
- steam autoclave
- gas autoclave
- some disinfectants
- powerful radiation
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Definition
relationship between normal flora and host |
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Term
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Definition
- require a special opportunity to produce disease such as injury or impaired host defenses
- same organism can often produce a variety of problems
- common organisms, frequently encounteredor already carried
- cause secondary infection
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Term
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Definition
- able to infect healthy host under own power and initiate disease
- produces one specific disease
- not so common
- cause of primary infection
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Term
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Definition
- organism must be present in every case of disease
- organism must be isolated in pur culture from a diseased host
- pure culture must produce the disease when inoculated into a healthy, susceptible host
- organism much be re-isolated in pure culture from infected experimented host
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Function of Kochs postulation |
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Definition
- to prove that certain microbes cause certain diseases
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Definition
- constantly present in a population
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Definition
disease that is intermediate between acute and chronic |
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Definition
- local infection enters a blood vessel and spreads to other parts of body
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Definition
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Term
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Definition
- toxic inflammatory condition arising from the spread of microbes and toxins
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Term
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Definition
- edema
- dyspnea (breathing diff)
- fever
- confusion
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Term
once in body, what are the sequence that disease follows? |
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Definition
- incubation period
- prodromal period
- period of illness
- period of convalenscence
- contagious period
- levels of recovery
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Definition
an organism that carries a pathogen such as animals carry pathogens from on host to another |
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Definition
infection aquired in hospital |
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Definition
incidence of a specific disease |
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Definition
- produced inside some bacteria then secreted outside
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Release of EXOTOXIN from LIVING bacterium |
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Definition
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Release of ENDOTOXIN from DEAD bacterium |
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Definition
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Definition
found on cell surface and fimbriae |
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