Bacteria Micro Flashcards
All cocci G+ except
GNC: Meningococci Gonococci Veilonella Moraxella
All bacilli G- except
GPB: MACDoNALD Mycobacterium Anthrax Clostridium Diphtheria o Nocardia Actinomycetes Listeria Diphtheroids
Grams staining
Methyl violet 1•
Grams I2
Acetone x 5s (alcohol)
Safranin (carbol or malachite green)
Bipolar stain SAFETY PIN
Yersinia pestis Burkholderia mallei/psedomonas B. psudomallei H ducreyi C. Granulomatis/Kelbsiella V parahemolyticus (7-8%) sea food Fransiella
Burkholderia mallei
Glanders
NON Motile
B pseudomallei
Meliodosis
MOTILE
Motility
Melli
Pseudomallei
Mallei- NON
Pseudo - MOTILE
Donovanosis
GRANULOMA INGUINALE
Calymatobacter granulomatis
Capsulated
PAKIY BMC V Pneumococcus Anthrax Kleb Influenza Yersinia Bordetella Meningo C welchii/ perfringens. Cryptococcosis V PARAhemolyticus 7-8%
Monotrichous
Amphi
Lopho
Peri
Mono- Vibrio cholera
Amphi - Alcaligens fecalis (enterobac)
Lopho~ SPIRILLUM MINUS (rat bite fever)
Peri - Enterobwcteriacea fam, Listeria
Differential motility
37 NON
20-25 MOTILE
Listeria
Yersinia enterocolytica
Swarming
Proteus
Shooting
Darting
V cholera
Tumbling
Listeria
Stately
Clostridium
Cork screw
T palladium spirochetes
ENDOFLAGELLA (periplasmic space)
Lashing
Borrelia
Gliding
Mycoplasma
Falling leaf
Giardia
Twitching
T vaginalis
Rotatory
B coli CILIATA
Hanging drop
Semi solid MMAgar (0.5-1.5%)
Cragies tube
Motility
Blood
Chocolate
Enriched.
Chocolate
Hemophilus
Neisseria
X and V in Chocolate
X - hemin
V - NAD
Eggs for solidification
Green (malachite)
Ruf tuf buff
LJ
Malachite - selective for TB #staph,strep
6-8wks
Mac Conkey
PLANT Peptone Lactose Agar Neutral red Taurocholate sodium (selective)
Name the only 3 LF
E Coli
Clebsiella
Shigella sonnei (LLF)
Differential
Indicator
1. Selective
2. Non selective
1 selective - Mac Conkey
2 non selective- CLED
CLED
Inhibits proteus swarming
Dx
UTI
Sugar media
Sugar
Andrades indicator
Peptone
Cx
Transport for Vibrio cholera 2 Gono&Meningo S pyogenes Shigella
Cholera - VR, Cary Blair
Neisseria - Amies and Stuart
Pyogenes - PIKES
Shigella - SACHS buffered glycerol saline
Obligate aerobe
MTB
Pseudomonas
Obligate anaerobes
ABC
Actinomycetes
Bacteroids
Clostridium
Microaerophilic
H pylori
C jejuni
Capnophilic
Brucella abortus
Pneumococcus
Gull wing at 42*C
C jejuni
GPC catalase
Staph + (bubbles on H2O2)
Strep -
Staph Coagulase
Patho staph +
CONS -
CONS Novobiocin testing MHA
Staph epidermis-sensitive
S saprophyticus - resistant
Mc
Antibiotic sensitivity agar
Method
Mc Muller Hinton > Nutrient
Mc Kirby baur disc diffusion < Stokes (controls, better)
Biofilm
Early prosthetic valve endocarditis <1y
Novobiocin sensitive
Staph epidermis
Young female UTI
Novobiocin resistant
Mc GPC - staph saprophyticus
Mc overall - E. coli
Gram + cocci
Coagulase +
Catalase +
SA
Golden yellow on NA enchanced on milk
Beta hemolytic on blood
SA
Blood beta hemolysis
PIN HEAD
PIN POINT
Head - Staph aureus
Pin - strep
MSA
Salt milk ludlam
Staph aureus
Coagglutination test
STAPH AUREUS: Protein A - Cowan 1 strain
Fc of Ig binds and co agglutinates MENINGOCOCCUS
Staph
Alpha hemolysin
Beta
Alpha - PARADOXICAL action
Inactive at 40. Active at 100
Beta- HOT AND COLD phenomenon
Usually hemolysis better at 37 deg but in staph better at 4*C
Leucocidin toxin by SA
Penton Valentine toxin
Most potent in SA DNAase Thermonuclease Coagulase Hyaluronidase Lipase Phosphatase
Coagulase
Staph food poisoning
Preformed ENTEROTOXIN A
SSSS toxin
Causes TEN adults and Reiters in children
Exfoliative toxin A & B
TSS toxin
Contaminated vaginal tampons
ENTEROTOXIN F
PYROGENIC EXOTOXIN C
Super antigen (lateral aspect of VB domain of T cell receptor) ——> >20% lymphocytes active and release lymphokines and shock
Doc for TSS staph
toxin rather than bacteria
Clindamycin
Reiters by Chlamydia
See pee dance
Conjunctivitis
Urethritis
Arthritis
Rx
Doxy
Cellulitis Impetigo Uncles BOTRYOMYCOSIS Tropical PYOMYOSITIS Post op parotitis Acute mastitis Acute OM NATIVE VALVE ENDOCARDITITS IVDA endocarditis
Staph aereus
MRSA MOA
PBP2a ——> Mec A gene
Via Bacteriophage TRANSDUCTION (others - conjugation)
Mec A 1-3 : nosocomial >48h
Mec A 4 : community
MRSA screening tests
Cefoxitin at 37 deg with NaCl 4% to enrich MRSA growth»_space;> oxacilin
Staph phage typing
Mc 80/81A
23 total sets
Strawberry tongue
Kawasaki
Strep Scarlet fever
Strep hemolysis
Alpha
Beta
Gamma
Alpha - PARTIAL HEMOLYSIS
Beta - COMPELTE
Gamma - NO
Alpha hemolysis strep
S pneumonia
S viridans
Beta hemolysis strep
Group AV-IJ of LanCefield classification Carbo C
⬇️
80-100 M protein of Griffith
Gamma hemolysis of strep
E fecalis
E faecium
Beta hemolysis strep
Group A
Gp B
Gp D
A - S pyogenes
B - S agalactiae
D - Enterococci ( beta + gamma )
Gp A vs Gp B Strep
- Bacitracin testing
- CAMP test
- Hippurate hydrolysis test
Bacitracin - Gp B resistant
Camp - ✅Gp B
Hippurate - ✅ Gp B
All 3 Gp B ⚠️ ie Agalactiae
Pyogenes ❎
Bacitracin done in which agar
Blood agar
GAS/GABHS
Pyogenes
Longest chain of strep in grams
S salivarius
Crystal violet blood agar
S pyogenes
Triad
Cellulitis
Impetigo
Erysepelas
S pyogenes
Mc acute pharyngitis
NF flesh eating bacteria
Puerperal sepsis
GABHS/ pyogenes
Super antigen of GABHS
Scarlet fever toxin
PYROGENIC toxin
Erthrogenic toxin A&C
Hi recurrent sore throat
Marked IMMUNE response
Complement normal
ASO >200
ARF
Life long penicillin Px
Ho pyodermic infection Mild to mod immune response Low complement ———> normal Anti DNAase B >300-350 Spontaneously comes and goes
AGN
GBS
S agalactiae
Normal commensalism of birth canal
⬇️
Early or late neonatal meningitis
GBS
Overall mc cause neonatal meningitis
E. coli ⬇️ Klebsiella ⬇️ GBS
CAMP test on blood agar
GBS enhances Staph aureus due to CAMP factor
Butterfly zone of HEMOLYSIS ➕
Can grow in 6.5% NaCl 40% bile 9.4 ph Resist temp of 45🌡 for minutes
Enterococci
E fecalis
E faecium
Black colonies in bile aescullin agar
Enterococci
Gram stain
Spectacle shape
Violet G+
Enterococci
Doc Enterococci
Penicillin + AG ⬇️ Resistant ⬇️ Vanco
VRE
Van A gene
(D ala ⏩ D lactate)
A most resistant
⬇️
H least resistant
Doc VRE
Linezolid
Dental caries strep
Mutans
SABE strep
Late onset prosthetic valve endocarditis >1y
Viridans
GPC
Lanceolate 🔥 flame shape
Draughtsman (carrom coin 🪙 on blood 🩸 and chocolate 🍫 agar))
Pneumococcus
Pneumococcus capsular polysaccharide Ag method of typing
90 types
SSS typing: Specific Soluble Substance
Quellung reaction
SEROLOGICAL (capsular Ag-Ab)
Capsule swelling and delineation
✅Pneumococcus
✅H influenza
Pneumococcus BIOchemical reaction
BIO
Bile soluble ✅
Optochin sensitivity ✅
Inulin fermenter ✅
Optochin - 2 ethyl hydrocupriene
COMPS Conjunctivitis Otitis media Meningitis Pneumonia Sinusitis
Pneumococcus
PCV in splenectomised
23 valent polysaccharide
7 valent vaccine
<2y children post Sx
- Cochlear implant
- CSF shunt
Doc for pneumococcus
Penicillin
Capsulated cocci Pink on Grams ➖ Lens shape 👀 Ferments GLU AND MALTOSE Intra and Extra cellular ✅✅
Meningococcus
NO plasmid 🧬 recruitment for resistance
Non capsulated coccus Pink on grams ➖ Kidney shape Ferments only GLU (RCUT) Plasmid 🧬 recruitment for resistance ✅ INTRAcellular mc
GONO coccus
Meningo based on capsular polysaccharide
13 sero groups
ABC YWE9&
Virulence factor GONO AND MENINGO 👯♀️
- Capsular polysaccharide
- LOS (endotoxic shock - meningicoccemia)
- OMP
- Pilli
- IgA1 protease (destroys surface IgA immunity)
Only GONO ♐️ LACTOFERRIN/TRANSFERRIN extra
Meningo nasopharyngeal carriers
5-15% NORMAL/healthy ppl
Via droplet ➡️ lungs ➡️ blood ➡️ meninges
Fever Headache Vomiting NECK RIGIDITY RASH / PETECHIAE 🤒
Meningococcal meningitis
Theyer Martin
Muller Hinton agar
Meningococcus
Recurrent neisserial infection
C5-9 def
Mc dreadful complication of meningococcus
Waterhouse fredrichson
Adrenal hemorrhagic syndrome
Meningo vaccine
MCV4 (ACYW)
Sero B ➖ WASTE no immunogenicity
Doc for meningo nasal carriers
Doc for cases
Carriers- Rifampicin
Ciprofloxacin
Cases - 3rd gen cephalo
Auxotyping (nutrient needed)
Pili based typing
GONO
Ophthalmia neonatarum
Urethritis males
Cervicitis females
Gono
GONO Cervicitis diagnosis swab
Endocervical
NOT HIGH VAG
Theyer Martin
Modified New York agar
Gono
Water can perinium in males
Gonococcus complication.
Multiple fistulas
Fitz hugh curtis
Perihepatitis
- Gono
- chlamydia
Suppurative arthritis & polyarthritis which GNC
Gono
Resistance in Gono
Plasmid recruitment
Oxidase positive
• Organisms
• Test
• Reagent
Organisms - Gono and pseudomonas
Test - WHITE disk turns BLUE 💙 in 10 sec
Reagent - TetraMethyl p phenylene diamine dihydrochloride
Kleb loefflers bacilli
C diph
Babes earnst granules
C diph
Energy deposits
Ponders
Albert’s
Neisser
(PAN)
C diph
Chinese letter pattern
Cuneiform
C diph bio types
Gravis
Intermedius
Mitis
GIM 🏋🏻♀️
GIM - Colony shape on PTA
Daisys frog eggs are poached
G- Daisy head
I- frog eggs
M - poached eggs
Leffler serum slope
PTA
HMT - Hoyles, Macleod, tinsdale
C diphtheria
PTA - best and most confirmatory
Toxins inhibiting PROTEIN SYNTHESIS
⬇️
#ADP ribosylation of EF2
DPS
Diptheria
Pseudomonas
Shigella
Toxin need IRON for its action (0.1mg/L)
C diph is made pathogenic by
Beta phage that injects a Tox gene
Via LYSOGENIC conversion
DPT vaccine strain
Park William 8 strain i op
Eleks gel ppt
PCR
ELISA
C diph Toxin demonstration for DIAGNOSIS (CDE)
Toxaemia not bacteremia
Shicks test
NEUTRALISATION TEST
C diph (dick)
➕person is susceptible and needs to be immunised
➖ immune
Trench mouth
Vincent’s angina
White membrane ➕
Pseudomembrane of Diph
Mc
Most dangerous
Mc Faucial or tonsil
Md laryngeal 😳
Bull neck in diphtheria due to
Edema and lymphedema
Chronic complications of diphtheria
Myocarditis
Polyneuropathies
Non corynebacterium
Parvum
Minutessimum
Pseudo TB
Jeikum
Non c diph
Immunomodulator
Parvum
Non c diph
Erythresma ➡️ Skin Bx on Wood lamp ➡️ coral red flurorescence 🩸
Minutessimum
Preizz nocard bacillus ➡️ lymphadenopathy
Pseudo TB
Non c diph
MDR isolate
Jeikum
Gram pos bacillus
Non motile
SPORES ➕
Cat A BIOTERRORIST
B anthracis
Capsule of Anthrax
Polypeptide (polyGlutamate)
Mc Feydan reaction
Capsule of B anthracis
Leffler methylene blue
Staining capsule of B anthrax
Bamboo stick on Grams
Medusa head on Agar
String of Pearls on Penicillin agar
Inverted fir 🌲 tree on Gelatin stab cx
Bacillus anthracis
Best selective media for B anthrax
PLET Polymyxin Lysozyme EDTA Thallus acetate
Tripartite toxin
Anthrax PLEase (don’t kill me bro) Protective factor Lethal factor Edema factor
Hide Porter
Cutaneous Anthrax
Dockyard shipyard
ESCHAR ➡️ malig PUSTULE ➡️ VESICLE
Wool sorter
Pulmonary anthrax
10-12y
MEDIASTINAL HEMORRHAGIC NECROSIS
Rx Duckering (dip in formalin to kill spores)
Ascolis thermoppt test
Lab Dx Anthrax
B cereus toxins
Emetic 1-6h (Chinese fried rice 🍚) HEAT STABLE toxin of E. coli
cGMP
Diarrheal 8-16h
HEAT LABILE toxin of E. coli
cAMP
Cx of B cereus
MYPA Mannitol Yolk egg 🥚 Phenol red (polymixin) Agar
GPB
Obligate ANAEROBE
Non capsule (except?)
Stately motility
Clostridium
Except- B perfeingens
Drum stick spores
Terminal spore in Clost
Tetani
Central spore of Clostridium
C. Bifermentans
Anerobiosis techniques
Mac Intosh (old) Mc GAS PAK Biological method (obligate aerobe Pseudomonas)
Cx media for Clostridium
RCM:
Meat 🍖 becomes Pink —— Saccharolytic
Black —— Proteolytic
Thioglycollate broth
Toxins of c perfeingens
Perfeingens has 13 toxins Alpha beta gamma theta etc ⬇️ A-E types Mc - Type A, alpha