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Ch 11
Bacteria Continued
53
Microbiology
Undergraduate 2
07/24/2010

Additional Microbiology Flashcards

 


 

Cards

Term
nonproteobacteria Gram negative
Definition
-photosynthetic gram - bacteria
-cyanobacteria
Term
cyanobacteria
Definition
-blue green pigmentation
-photosynthesis
-many can fix nitrogen to ammonium in heterocysts (cells impermeable to O2)
-some adjust buoyancy using gas vacuoles
-eukaryotic chloroplasts evolved from them
Term
Gram positive bacteria
Definition
-aerobes, facultative, and anaerobes
-2 phyla
-Firmicutes (low GC)
-Actinobacteria (high GC)
Term
Firmicutes characteristics
Definition
-low GC
-spore forming bacteria
-medically relevant bacteria
-bacteria important in the industry
Term
Firmicutes types
Definition
-Clostridium
-Bacillus
-Staphlococcus
-Lactobacillus
-Streptococcus
-Enterococcus
-Listeria
-Mycoplasma
Term
Clostridium
Definition
-rod shaped obligate anaerobes
-forms spores that distort the cell
Term
C. botulinum
Definition
-botulism
-1 micro gram of uncooked bean could be fatal
-boiling denatures
-botox also
Term
C. tetani
Definition
-causes tetnus
-spores get in body through wounds, blocks neurotransmitter
-spasms
Term
C. perfringens
Definition
-responsible for gas gangrene and foodborne diarrhea
Term
C. difficile
Definition
-human intestinal normal flora
-causes diarrhea and other intestinal disease when competing bacteria are wiped out by anitbiotics
Term
Bacillus
Definition
-facultative anaerobes that form endospores
-ubiquitous
Term
B. anthracis
Definition
-anthrax
-only bacterium with a protein capsule
-produces toxin
Term
B. cereus
Definition
-causes foodborne illness
-produces toxin
Term
B. thuringiensis
Definition
-biocontrol against a variety of insect pests
-crystal is toxic to insect
-pH activates in intestine, swells, and lysis
Term
Staphlococcus
Definition
-facultative anaerobes
-grow well in high osmotic pressure and low moisture
-natural inhabitants of nose and skin
Term
S. aureus
Definition
-common cause of food poisoning
-infects surgical wounds
-toxin responsible for toxin shock syndrome
-quickly develops resistance (MRSA)
Term
S. epidermidis
Definition
natural inhabitant of the skin
Term
Lactobacillus
Definition
-facultative anaerobes
-convert lactose to lactic acid
-present in human vaginal and gastrointestinal tract
-some used for yogurt, cheese, sauerkraut, pickles, beer, wine
Term
L. casei and L. brevis
Definition
-most common beer spoilage organisms
Term
streptococcus
Definition
-part of normal flora of mouth, skin, intestine, and upper respiratory tract
Term
S pyogenes
Definition
-strep throat
-endocartitis (heart inflammation)
-necrotizing faciititis (flesh eating disease)
-beta hemolytic
Term
S. pneumoniae
Definition
-meningitis
Term
S. mutans
Definition
dental caries (tooth decay)
Term
S. agalactiae
Definition
neonatal sepsis(blood infection)
beta hemolytic
Term
S. thermophilus
Definition
-some cheeses and yogurts
Term
beta hemolytic streptococci
Definition
-produce hemolysin to lyse RBC
Term
non beta hemolytic streptococci
Definition
-gamma-no color
-alpha- green (H2O2)
Term
Enterococcus
Definition
-found in gastrointestinal tract, vagina and oral cavity
-large numbers in human stool
-leading cause of nosocomial(hospital) infections
Term
E. faecalis and E. faecium
Definition
-infections of surgical wounds and urinary tract
Term
Listeria
Definition
-contaminate food especially dairy
Term
L. monocytogenes
Definition
-cryophile (likes cold)
-can survive in phagocytic cells
-can cause still birth or damage to fetus
Term
Mycoplasma
Definition
-smallest organism that can independently grow on a cell free medium
-only prokaryotes that lack cell wall and contain sterols
-highly pleomorphic
-chronic diseases
-fibromyalgia syndrome, gulf war syndrome, rheumatoid arthritis
Term
Actinobacteria
Definition
-high GC
-include pleomorphic
-important pathogens
-filamentous bacteria
Term
Types of Actinobacteria (9)
Definition
-Mycobacterium
-Corynebacterium
-Propionibacterium
-Actinomyces
-Streptomyces
Term
mycobacterium
Definition
-do not retain crystal violet
-acid fast G+ (no outer membrane)
-thick cell wall of mycolic acids
-very slow growth
Term
M. tuberculosis
Definition
-tuberculosis
Term
M. leprae
Definition
leprosy
Term
Corynebacterium
Definition
C. diphteriae causes diphteria
Term
Propionibacterium
Definition
-swiss cheese and acne
Term
P. freudenreichii
Definition
swiss cheese
Term
Actinomyces
Definition
-thermophiles found in throat and mouth of humans
-can form branched filamaents
-number of enzymes that degrade plant organic material
-many are opportunistic pathogens of humans in oral cavity
-can cause abcesses in mouth, lung, intestine
-farmers lung
Term
streptomyces
Definition
-very abundant in soil
-reproduce through asexual spores
-distinct earthy odor from production of geosmin
-produce many commercial antibiotics
Term
Planctomycetes
Definition
-Gram negative
-aquatic
-budding
-no peptidoglycan
-Gemmata obscuriglobus has a double membrane around its DNA
Term
Chlamidiae
Definition
-small coccoid bacteria
-no peptidoglycan in cell wall
-obligate intracellular paracites of vertebrates unable to make own ATP
-unique pattern of replication
-most common STD
-4 million in US each yr
-humans are only natural host
-leading causes of female infertility
Term
C. trachomatis
Definition
-major infectious cause of human eye (may lead
to blindness – trachoma) and genital disease
Term
Spirochetes
Definition
-coiled
-move by axial filaments
-many found in human oral cavity
-some found on protazoa in termites
Term
Spirochete types
Definition
-Treponema
-Borrelia
-Leptospira
Term
Treponema
Definition
-Many pathogens
-T. pallidum causes syphilis (sexual contact or through placenta)
Term
Borrelia
Definition
lyme disease (tick/lice)
Term
Leptospira
Definition
-excreted in the urine of dogs,rates, swine
-part of domestic cats and dogs vaccination
Term
Bacteriodetes types
Definition
-Bacteroides
-Prevotella
Term
-Bacteroides
Definition
-anaerobes
-human intestine
-gingival crevice and deep tissue infections
Term
Prevotella
Definition
-periodontal and tooth problems
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