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Bacteria
All Lectures
63
Microbiology
Graduate
09/20/2009

Additional Microbiology Flashcards

 


 

Cards

Term
Streptococcus pneumoniae
Definition
Gram (+) diplococci, alpha-hemolytic, opt sensitive, capsular, catalase (-)

Disease:
1. Causes 60% of pneumonia cases
2. Most common cause of meningitis in adults (over 30 years)

Vaccine: polyvalent and conjugated
Term
Moraxella catarrhalis
Definition
Typical pneumonia

Gm -

Commensal in 1/2 children and elderly
Term
Legionella pneumophila
Definition

Severe pneumonia

Pontiac fever (less severe)

Gm -, Opportunistic, amoeba or macrophages

 

Grow on charcoal yeast extract culture

 

Environmental water source

 

Treat w/ erythromycin

 

 

Term
Klebsiella pneumoniae
Definition
Enterobacteraceae gm -, lac +, facultative anaerobe pneumonia in hospitals and alcoholics
Term
Pseudomonas aeruginosa
Definition
Gm -

Pneumonia in CF patients
Nosocomial
Term
Haemophilus influenzae type b
Definition
Pneumonia (opportunistic) and meningitis in children 6 m - 4 yrs

Hib Vaccine: Hib-PrP capsular antigen

Diagnosis: NAD and Hemin (X, V factor respectively), chocolate agar
Term
Mycoplasma pneumoniae
Definition

Atypical pneumonia no cell walls, sterols treat w/ antibiotics that don't attack cell walls

 

Sequela: Guillan Barre Syndrome

Term
Chlamydia pneumoniae
Definition
Gm (-), obligate intracellular pathogen
Atypical walking pneumonia
EB/RB forms
Term
Chlamydia psitacci
Definition
Gm (-), obligate intracellular pathogen
Atypical walking pneumonia
Parrot fever
Term
Mycobacterium tuberculosis
Definition
Acid-fast, 40% lipid wall, mycolic acids, aerobic, catalase (+), slow growth rate, facultative intracellular growth in macrophages

Nonmotile, no capuse, no pili, no exotoxin/endotoxin

Causes Primary (Ghon complex) and/or Secondary TB disease (pulmonary or extrapulmonary)
Term
Mycobacterium leprae
Definition

Acid-fast, slow growing, obligatory intracellular parasite, cat (+) Contagious after prolonged contact Clinical: Tuberculoid (granulomas) when CMI active Lepromatous: (skin lesions, leonine facies deformations) when CMI defective

 

Tx: oral dapson (toxicity - hemolysis and methemoglobinemia)

Term
M. avium-Intracellular Complex (MAC)
Definition
TB-like disease in immunocompromised
Systemic in AIDS patients
Term
Mycobacterium Kansasii
Definition
Photo-chromogenic mycobacterium
Pulmonary TB
Term
Actinomyces Israelii
Definition
Type of Antinomycosis: opportunistic, branched filamentous growth

Anearobic, Gm (+), not acid fast
Facial and neck sulfur granules
Term
Nocardiosis spp.
Definition
Type of Antinomycosis: opportunistic, branched filamentous growth

Acid-fast, aerobic
Term
Vibrio cholerae
Definition

Vibrionaceae family lacatose (-), oxidase (+), Hektoen (-) In contaminated water (seafood)

Toxin - ADP ribosylation of G protein --> AC --> Cl- into lumen of gut, decreasing Na+ absorption --> H2O --> severe diahrrhea

Term
E. coli species
Definition
Gm (-), oxidase (-), Hektoen (+), MacConkey agar, motile

ETEC (traveller's), EHEC (Hemorrhagic), EIEC, EPEC (pediatric)

Family enterobacteriaceae
Term
EHEC
Definition
SMAC (-), 0157:H7, shiga toxin

Dysentery, HUS, renal & CNS complications, hemolytic anemia

Family enterobacteriaceae
Term
Shigella dysenteriae
Definition

Gm (-), lactose (-), oxidase (-),  no H2S

Shiga-toxin, O-antigen Cause dysentery Family enterobacteriaceae

 

Term
Camylobacter jejuni
Definition
Family vibrionaceae Gm -, campy agar, urease - (if +, H. pylori), found in birds (poultry, eggs) Cause dysentery
Term
Salmonella
Definition
spp. tyhpi (survive in macrophage) and enteritidis lactose -, oxidase -, H2S +, dysentery Contaminated food/water Typhoid fever: systemic, rash Gastroenteritis: most common cause of food poisoning Family enterobacteriaceae
Term
Vibrio spp.
Definition
spp. parahemolyticus, vulnificus

Dysentery

In shell fish

oxidase +
Term
Yersinia enterocolitica
Definition
Dysentery

zoonotic (daycares)

pseudoappendicitis
Term
Bacillus cereus
Definition

Gram (+) aerobic, spore-forming rod

Food poisoning: Emetic and colonizing (GI)

Term
Clostridium difficile
Definition
Gram (+) spore-forming rod (toxigenic)

Opportunistic with/after antibiotic use: toxin causes dysentery
Term
H. pylori
Definition

family vibrionaceae Gm - rod, urease +

ability to survive in acidic stomach (creates alkaline environment)- causes peptic and duodenal ulcers

Tx: triple therapy: metronidazole, omeprazole, clarithromycin

Term
Neisseria Gonorrhea
Definition

Gm (-), cat (+), maltose non-fermenter, Thayer-martin media

Urethritis, penile discharge (often cryptic in females) (STD) Phage (pilE) and Antigenic (pilS) variation)

Term
Chlamydia trachomatis
Definition
Gm (-) obligate intracellular pathogen

Cause: urethritis and lymphogranuloma venereum

EB/RB phase cycle

Diagnosis by PCR or LCR from DNA from cervical specimen (female)/ first streem urine (male)
Term
Treponema pallidum
Definition
Syphilis

Gm (-) spirochete-helical protoplasmic cylinder, motile, grown in rabbit testicles

Syphilis: spirochetes can be detected in chancre fluid (non-specific followed by specific Ab tests)

Primary, Secondary, tertiary, latent, and congenital forms
Term
Neisseria Meningitidis
Definition
1. Meningococcemia, (2) Waterhouse-Friederichsen syndrome (hemorrhage) (3) sequela: hearing loss and mental retardation

Affects closed groups, c5-c9 deficiencies, sub-saharan africa (neonates IgG immune)

Gm - diplococci, chocolate agar
Term
Streptococcus Agalactide (GBS)
Definition
Found in Genitourinary tract and lower GI Neonatal sepsis, meningitis, post-partum sepsis Other causes of neonatal meningitis: Listeria monocytogenes, E coli, staph A, Enterococcus
Term
Yersinia pestis
Definition
Bubonic plague

Gm - coccobacilli

Rat flea (coagulase)

Death in 7-10 days
Term
Francisella tularensis
Definition
Tularemia- deerfly fever

gm- coccobacilli

don't play with dead mammals/birds!
insect bites
Term
Brucella melitensis, abortus
Definition
Brucellosis-Malta fever

Gm - coccobacilli

milk from cows (vaccinate cows and pasteurize milk to prevent)
Term
Pasteurella multocida
Definition
Gm - coccobacilli

dog bite
Term
Borrelia burgdorferi
Definition
Lyme disease, deer tick
-Early localized, early disseminated (CNS), and Late (chronic) stage
-sequela due to antigenic switching

Spirochete

Doxycilin
Term
Bacillus anthracis
Definition
Gram positive spore-forming rod

In sheep
Term
Listeria monocytogenes
Definition
Gram positive non-spore forming rod

Neonatal meningitis

In fertilizer
Term
Bartonella hanselae
Definition
Cat scratch disease
Term
Bartonella quintana
Definition
Trench fever
Term
Rickettsia ricketsii
Definition
Rocky Mountain Spotted fever
Wood/dog tick
Rash starts from periphery and migrate to the trunk
Gm- obligate intracellular pathogen
Term
Rickettsia prowazeki
Definition
Endemic Louse-borne Typhus
(Brill-zinsser disease- relapse)

Gm- obligate intracellular pathogen
Term
Rickettsia typhi
Definition
Endemic Murine Typhus (rat tick)

Gm- obligate intracellular pathogen
Term
Rickettsia tsusugamushi
Definition
Scrub typhus (mites)
Gm- obligate intracellular pathogen
Term
Rickettsia akari
Definition
Rickettsia Pox
Gm- obligate intracellular pathogen
Term
Ehlrichia chaffeensins
Definition
Ehlrichiosis (multiplies in WBCs)

Lymes-like
Term
Coxiella burnetti
Definition
Q fever
Term
Corneybacterium diptheriae
Definition
Gm + non-spore forming rod

Diptheria toxin: Simple A-B (ADP-ribosylates EF, repressed by iron)

Mucoid coat in throat (can spread to heart and peripheral nerves)

D(PT) vaccine

Diagnosis: potassium tellurite agar
Term
Bordatella pertussis
Definition
Gm- coccoid

Pertussis toxin: complex A-B (ADP ribosylates Gi ==> increases cAMP)

Whooping cough

(D)P(T) vaccine
Term
Pseudomonas aeruginosa
Definition
Opportunistic (Pneumonia in CF patients)

Gm - rod, lac-, ox+

Toxin: ExoS-ADP ribosylates G proteins
ExoA-simple A-B-ribosylates EF2
Term
Pseudomonas aeruginosa
Definition
Opportunistic (Pneumonia in CF patients)

Gm - rod, lac-, ox+

Toxin: ExoS-ADP ribosylates G proteins
ExoA-simple A-B-ribosylates EF2
Term
Clostridium tetani
Definition
Gm + spore forming rod

Toxin: enzymes cleaves secretory proteins in inhibitory neurons blocking NT release

CNS, lock jaw
Term
Clostridium botulinum
Definition
Gm + spore forming rod

Toxin: endopeptidase blocks release of Ach (paralysis)

Food intoxication, infant/wound

Antitoxin
Term
Clostridium pefringens
Definition
Gas Gangrene (muscle necrosis)

Gm + spore forming rod (anaerobe)

Toxins: lecithinase, enterotoxin, degredative enzymes
Term
Staph Aureus
Definition
Gm+, cat +, coagulase +, beta-hemolytic,

Virulence: Protein A, clumping factor (antiphagocytic)

Infections: suppurulent skin, toxigenic (TSS, SSSS, food poisoning intoxication)
Term
Staph epidermidis
Definition
Gm +, cat +, coagulase -, novobiocin sensitive (NO StRES)

endocarditis, septicemia
Term
Staph saprophyticus
Definition
gm +, cat +, coagulase -, novobiocin resistant (NO StRES)

UTIs
Term
Streptococcus Pyogenes
Definition
Gm +, cat-, Beta-hemolytic, Group A

Virulence factors: M protein, enzymes (invade and spread), SPE (A,B,C,E)

Infections:
1.Pharyngitis (can lead to ARF)
2. Skin (can lead to AGN, TSLS)
3. Toxigenic (Scarlet fever, TSLS)
4. Necrotizing fasciitis + pneumonia

Sequela: ARF, AGN
Term
Streptococcus Agalictiae
Definition
Gm +, cat-, Beta hemolytic, Group B (GBS)

lower GI and Genitourinary tract

Neonatal sepsis, meningitis, post partum sepsis
Term
Streptococcus Bovis
Definition
Gm +, cat-, alpha/non hemolytic, Group D, sodium -

Endocarditis, bacteremia
Term
Enterococcus faecalis/faecium
Definition
Gm +, cat-, alpha/non hemolytic, Group D, sodium +

UTIs

TGEs --> antibiotic resistance
Term
Streptococcus pnuemoniae
Definition
Gm +, cat-, alpha hemolytic, opt sensitive (OVRPS)

pneumonia, otitis media, meningitis
Term
Viridian Streptococcus
Definition
Gm +, cat-, alpha hemolytic, opt resistant (OVRPS)

Dental caries, heart problems

Treat dental pt prophylactically if heart problems exist
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