Micro Flashcards
Where is Lipoteichoic acid found
Cell wall/cell membrane
Lipoteichoic acid induces
TNF and IL-1
What is found in the outer membrane (Gram -)
Endotoxins (LPS)
Lipd A induces
TNF and IL-1
Periplasm is
Space between the cytoplasmic membrane and outer membrane in Gram- bacteria
Site of Lacatmase
What part of cell wall is unique to Gram+
Lipoteichoic acid
What part of cell wall is unique to Gram-
LPS
Periplasm
These Microbes May Lack Real Color are bugs that don’t stain well
- Treponema (too thin)
- Mycobacteria (High lipid content)
- Mycoplasma (no cell wall)
- Legionella (Intracellular)
- Rickettsia (Intracellular)
- Chlamydia (Intracellular)
Dark field and fluorescent antibody staining used for
Treponema
Silver stain used for
- Legionella
- Fungi
- H. Pylori
Giemsa stains what
- Chlamydia
- Borrelia
- Rickettsiae
- Trypanosomes
- Plasmodium
PAS stains what
Glycogen
Mucopolysaccharides
used for Whipple
Ziehl-Neelsen stains
Acid-fast organisms
- Nocardia
- Mycobacterium
Inida ink stains
Cryptococcus neoformans
Chocolate agar with factor 5 and 10 used to grow
H. influenzae
Thayer-Martin media has VPN
Vancomycin
Polymyxin
Nystatin
Thayer-Martin media grows
Neisseria
Bordet-Genou agar grows
B. pertussis
What does C. diphtheriae grow on
Tellurite agar
Löffler medium
Löwenstein-Jensen agar grows
M. tuberculosis
Eaton agar grows
M. pneumoniae because it requires cholesterol
Charcol yeast extract agar grows
Legionella
Fungi grow on
Sabouraud agar
Nagging Pests Must Breathe need oxygen to grow
Nocardia
Pseudomonas
MycoBacterium tuberculosis
Anaerobes that Can’t Breathe Air or will die
Clostridium
Bacteroides
Actinomyces
SHiNE SKiS are encapsulated bacteria
- S. pneumoniae
- H. influenzae
- N. meningitides
- E. coli
- Salmonella
- Klebsiella
- group B Strep
Catalase-positive organisms
PLACESS for CATs
- Pseudomonas
- Listeria
- Aspergillus
- Candida
- E. coli
- S. aureus
- Serratia
Urease-positive bugs
CHuck Norris hates PUNKSS
- Cryptococcus
- H. pylori
- Proteu
- Ureaplasma
- Nocardia
- Kelbsiella
- S. epidermidis
- S. saprophyticus
Bacterial virulence factors promote
Evasion of host immune response
Bacterial virulence factors
- Protein A (S. aureus)
- IgA protease (SHiN)
- M protein (Group A Strep)
Protein A binds to
Fc region of IgG preventing opsonization and phagocytosis
M protein helps
Prevent phagocytosis
Clinical effects of endotoxins
Fever, shock (hypotension), DIC
What exotoxins inhibit protein synthesis
- Diphtheria toxin (C. diphtheriae)
- Exotoxin A (Pseudomonas)
- Shiga toxin (Shigella)
- Shiga-like toxin (EHEC)
What exotoxins inactivate EF-2
Diphtheria toxin (C. diphtheria)
Exotoxin A (Pseudomonas)
What exotoxins inactivate 60S robosome by removing adenine from rRNA
Shiga toxin
Shiga-like toxin
What exotoxins increase fluid secretion
- Heat-Labile toxin [LT] (ETEC)
- Heat-Stable toxin [ST] (ETEC)
- Edema factor (Anthracis)
- Cholera toxin (Cholerae)
Heat-labile toxin mechanism of action
Increase activity of cAMP
Heat-Stable toxin mechanism of action
Increase activity of cGMP
How does Cholera toxin increase activity of cAMP
Permanently activating Gs
What exotoxins inhibit phagocytic ability
Pertussis toxin
Mechanism of Pertussis toxin
Overactivates cAMP by diabling Gi impairing phagocytosis to permit survival of microbes
What exotoxins lyse cell membrane
Alpha toxin (Clostridium perfringens)
Streptolysin O (S. pyogenes)
Catalase + Coagulase + Gram + cocci
S. aureus
Novobiocin Sensitive, Catalase +, Coagulase -, Gram + cocci
S. epidermidis
Novobiocin Resistant, Catalase +, Coagulase -, Gram + cocci
S. saprophyticus
Optochin Sensitive, α-hemolytic, Catalase -, Gram +, capsulated cocci
S. pneumoniae
Optochin Resistant, α-hemolytic, Catalase -, Gram +, cocci
Viridans
Bacitracin Sensitive, β-hemolytic, Catalase -, Gram +, Group A cocci
S. pyogenes
Bacitracin Resistant, β-hemolytic, Catalase -, Gram +, Group B cocci
S. agalactiae
S. pneumoniae ause MOPS
- Meningitis
- Otitis media in children
- Pneumonia
- Sinusitis
Pyogenic aspect of S. pyogenes (Group A strep)
- Pharyngitis
- Cellulitis
- Impetigo (Honey Crusted lesions)
Toxigenic aspect of S. pyogenes (Group A strep)
- Scarlet fever
- Toxic Shock-like syndrome
- Necrotizing fasciitis
Immunologic aspect of S. pyogenes (Group A strep)
RF
Acute glomerulonephritis
Scarlet fever is
- Due to S. pyogenes (Group A strep)
- Sandpaper-like texture
- Strawberry tongue
- Circumoral pallor
Gram + Rods
- Clostridium (anaerobe)
- Cornybacterium
- Listeria
- Bacillus (Aerobe)
- Mycobacterium (Acid-fast)
Symptoms of C. diphtheriae
- Pseudomembranous pharyngitis (grayish-white membrane)
- Lymphadenopathy (Bull neck)
- Myocarditis
- Arrhythmias
ABCDEFG of C. diphtheriae
- ADP-ribosylation
- Beta-prophage
- Cornyebacterium
- Diphtheriae
- EF2
- Granules
Gram +, spore-forming, obligate anaerobic bacilli
Clostridia
Listeria monocytogenes are found in
Unpasteruized diary products and deli meats
Lepromatous is due to
Th2 response causing Lion-like face, diffused over skin and communicable
Tuberculoid is
Due to Th1 response
Few hairless skin plaques
Lepromatous Rx.
Dapsone + Rifampin + Clofazimine for 2-5 yrs
Tuberculoid Rx.
Dapose + Rifampin for 6 month
Maltos fermenting, Gram - Diplococci
N. meningitidis
Maltose nonfermenter, Gram -, Diplococci
N. gonorrhoeae
Gram -, Coccoid rods
- H. influenzae
- Pasteurella
- Brucella
- B. pertussis
Fast lactose fermenting (pink on MaCkonkey) Gram -, Rods
- Klebsiella
- E. coli
- Enterobacter
Slow Lactose fermenting (pink on MaCkonkey) Gram -, Rods
- Citrobacter
- Serratia
Oxidase -, Non-lactose fermenter, Gram -, Rods
- Shigella
- Salmonella
- Proteus
- Yersinia
Oxidase +, Non-lactose fermenting Gram -, Rods
Pseduomonas
Urease producing, Oxidase +, Gram - comma shaped
H. pylori
Oxidase + Gram -
V. cholerae
Oxidase + grows in 420 C Gram -
C. jejuni
What does Legionella need to grow
Iron and cysteine
Legionnaires’ disease is
Severe pnemonia, fever, Gi and CNS due to Legionella
PSEUDOmonas causes
- Pneumonia
- Sepsis
- External Otitis
- UTI
- Drug use
- Diabetic Osteomyelitis
K capsule in E. coli causes
Pneumonia
Neonatal meningitis
Rice-water diarrhea caused by
V. Cholerae
Mesenteric adenitis
Caused by Y. enterocolitica
Mimic Crohn disease or appendicitis
Weil disease is
- Severe infection of Leptospira interrogans with jaundice and azotemia from liver and kidney dysfunction
- Fever
- Hemorrhage
- Anemia
Jarisch-Herxheimer reaction is
- Flu-like syndrome after AB are started
- Due to killed bacteria releasing pyrogens
Clue cells seen in
Gardnerella vaginalis
Diseases that lead to Bells Palsy
- Lyme
- HSV
- AIDs
- Sarcoidosis
- Tumors
- Diabetes
Palms and soles rash seen in
- Coxsackievirus A
- Rocky mountain spotted fever
- 2o Syphilis
What subtype of Chlamydia causes blindness due to follicular conjuntivitis in Arica
A, B, and C
Histoplasmosis found in what area
Mississippi and Ohio River valleys
Where is Histoplasma found
Bat and bird droppings
What does Histoplasma invade
Macrophages
Blastomycosis found in what area
East of Mississippi river and Central America
Granulomatous nodules involving skin and bone caused by
Blastomycosis
Spaghetti and Meatball appearance
Tinea versicolor
Candida appearance
Pseudohyphae and budding yeasts
Aspergillus appearance
Acute Angles, not Dimorphic
What is found in pigeon droppings and cause meningitis
Cryptococcus
What is used to stain Cryptococcus
India Ink and Mucicarmine
What is the appearance of the lesion in Cryptococcus
Soap bubble
Rose gardener’s disease is
Local pustule or ulcer with nodules along draining lymphatics caused by Sporothrix
Sporothrix appearance
Dimorphic, cigar-shaped budding yeast
Giardia causes
- Bloating
- Flatulence
- Foul-smelling, fatty diarrhea
What Protozoa causes brain abscess in HIV with ring-enhancing brain lesions
Toxoplasma gondii
Enterobius vermicularis AKA
Pinworm
Ascaris lumbricoides AKA
Gian roundworm
Ancylostoma duodenale AKA Necator americanus AKA
Hookworm
What intestinal nematode causes anemia
Ancylostoma duodenale AKA Necator americanus AKA hookworm
Worm in conjunctiva caused by
Loa Loa
What nematode causes elephantiasis
Wuchereria bancrofti
What parasite is associated with Biliary Tract disease and cholangiocarcinoma
Clonorchis sinensis
What parasite is associated with Brain cysts and seizures
Taenia solium
What parasite is associated with Hematuria and bladder cancer
Schistosoma haematobium
What parasite is associated with Liver cysts
Echinococcus granulosus
What parasite is associated with Microcytic anemia
Ancylostoma
Necator
What parasite is associated with Perianal pruritis
Enterobius
What parasite is associated with Portal HT
Schistosoma mansoni
Schistosoma japonicum
What parasite is associated with Vit B12 deficiency
Diphyllobothrium latum
Live attenuated vaccines are
- Smallpox
- Yellow fever
- Chickenpox
- Sabin
- MMR
- Intranasal Influenza
Killed vacines are RIP Always
- Rabies
- Injected Ifluenza
- Salk Polio
- HAV
All dNA viruses are dsDNA except
Parvovirdae ssDNA
All DNA viruses are linear excpet
Papilloma
Polyoma
Hepadnavirus
I went to a Retro Toga party where I drank flavored Corona and ate Hippy California pickles.
Positive-stranded RNA viruses
- Retrovirus
- Togavirus
- Flavivirus
- Coronavirus
- Hepevirus
- Calicivirus
- Picornavirus
All RNA virues are ssRNA except
Reoviridae
All DNA viruses replicate in nucleus except
Poxvirus
All RNA viruses replicate in cytoplasm except
Ifluenza and retrovirus
Naked DNA viruses
PAPP
- Papillomavirus
- Adenovirus
- Parvovirus
- Polyomovarius
Naked RNA viruses
- Calicivirus
- Picornavirus
- Reovirus
- Hepevirus
Pardon PaPa As He Has Pox
DNA viruses
- Parvo
- Polyoma
- Papilloma
- Adeno
- Hepadna
- Herpes
- Pox
Adenovirus causes
- Pharyngitis
- Hemorrhagic cystitis
- Pnemonia
- Conjunctivitis
Colorado tick fever caused by
Coltivirus which is Reovirus
What is the #1 cause of fatal diarrhea in children during the winter
Rotavirus from Reovirus
PERCH are Picornaviruses
- Poliovirus
- Echovirus: Aseptic Meningitis
- Rhinovirus
- Coxsackieveirus
- HAV
Faviviurses consist of
- HCV
- Yellow fever
- Dengue
- St. Louis Encephalitis
- West Nile
Rubella is what viral family
Togavirus
PaRaMyxovirus’s:
- Parainfluenza: Croup
- RSV: bronchiolitis in babies
- Measles
- Mumps
Negative-stranded RNA viruses must transcribe
- strand to + strand with their own RNA-dependent RNA polymerase
BOAR are segmented viruses
Bunyavirus
Orthomyxovirus
Arenavirus
Reovirus
Genetic shifts cause
Pandemics because of Reassortment of viral genome
Genetic drifts cause
Epidemics because of minor changes on random mutation
Measles causes 3 C’s
Cough
Coryza
Conjunctivitis
Koplik spots are
Bright red spots with blue-white center on buccal mucosa seen in Measles
POM-poms in Mumps
Parotitis
Orchitis
Meningitis
Hepatitis is that RNA virus
- HAV (Picornavirus)
- HCV (Flavivirus)
- HDV
- HEV (Hepevirus)
Hepatitis that is DNA virus
HBV (Hepadnavirus)
Histoplasma capsulatum in HIV seen when CD4 drops to
<100 cells
Histoplasma capsulatum in HIV clinical
- Fever
- Cough
- Hepatosplenomegaly
- Tongue ulcer
Candida in HIV seen when CD4 drops to
<400 cells: Oral
<100 cells: esophageal
EBV in HIV clinical
Hairy leukoplakia
N-HL (Waldeyer ring)
Primary CNS lymphoma
Cryptosporidium in HIV seen when CD4 drops
<200 cells
Cryptosporidium in HIV clinical
Chronic, Watery Diarrhea
Toxoplasma gondii in HIV seen when CD4 drops
<100 cells
JC virus reactivation causing PML in HIV seen when CD4 drops
<200
Cryptococcus neoformans in HIV seen when CD4 drops
<50 cells
CMV in HIV seen when CD4 drops
<50 cells
CMV in HIV clinical
Retinitis with Cotton-wool spots
Interstitial pneumonia
Pneumocystis jirovecii (PCP) in HIV seen when CD4 drops
<200 cells
Pneumocystis jirovecii pneumonia in HIV appearance
Ground-glass
MAC in HIV seen when CD4 drops
<50
Bloody diarrhea with Day-care outbreak caused by
Y. enterocolitica
Bugs causing bloody diarrhea (7)
- Camplyobacter
- E. histolytica
- EHEC
- EIEC
- Salmonella
- Shigella
- Y. enterocolitica
Bugs causing watery diarrhea (6)
- C. difficle
- C. perfringens
- ETEC: travelers diarrhea
- Protozoa
- Giardia
- Cryptosporidium
- V. cholerae
- Rotavirus
Pneumonia in Neonates caused by
Group B strep
E. coli
Pneumonia in children caused by
Runts May Cough Chunky Sputum
- RSV
- Mycoplasma
- C. trachomatis
- C. pneumonia
- S. pneumonia
Meningitis in newborns caused by
Group B strep
E. coli
Listeria
Meningitis in children caused by
- S. pneumoniae
- N. meningitidis
- H. influenzae
- Enteroviruses
Meningities in teens and adults caused by
- S. pneumoniae
- N. meningitidis
- Enteroviruses
- HSV
Meningitis in elderley
- S. pneumoniae
- Gram- rods
- Listeria
ToRCHeS of newborns
- Toxoplasma gondii: cat
- Rubella
- CMV
- Herpes simplex 2
- Syphilis
Toxoplasm gondii neonatal manifestation
- Chorioretnitis
- Hydrocephalus
- Intracranial calcification
Rubella neonatal manifestations
- PDA
- Cataracts
- Deafness
- Blueberry muffin rash
CMV neonatal manifestation
- Hearing loss
- Seizures
- Bluberry muffin rash
Syphilis neonatal manifestions
- Hydropfetalis
- Notched teeth
- Saddle nose
- Short maxilla
- Saber shins
- CN8 deafness
Rash beginning at head and mves down in unimmunized children think
Rubella
Rash that begins at head and moves down preceded by cough, coryza, conjunctivits and blue-white (koplik) spots in unimmunized children think
Measles
Currant jelly sputum in
Klebsiella
Facial nerve palsy in
Borrelia burgdorferi (lyme disease)
Penicillin G, V used for
- Mostly Gram +:
- S. pneumoniae
- S. pyogenes
- Actinomyces
- N. meningitidis
- T. pallidum
Ampicillin and Amozicillin used for HELPSS
- H. influenzae
- E. coli
- Listeria
- Proteus
- Salmonella
- Shigella
Penicillinase-resistant pencillins:
Oxacillin
Nafcillin
Dicloxacillin
Antipseudomonal penicillins:
Ticarcillin
Piperacillin
Cefazolin what Cephalosporin generation
Generation 1
Cephalexin what Cephalosporin generation
Generation 1
Cefoxitin what generation Cephalosporin
Gen 2
Cefaclor what generation Cephalosporin
Gen 2
Cefuroxime what generation Cephalosporin
Gen 2
Ceftriaxone what generation Cephalosporin
Gen 3
Cefotaxime what generation Cephalosporin
Gen 3
Ceftrazidime what generation Cephalosporin
Gen 3
Cefepime what generation Cephalosporin
Gen 4
Ceftaroline what generation Cephalosporin
Gen 5
PEcK is
- Covered by Gen 1 cephalosporn
- Proteus
- E. coli
- Klebsiella
HEN PEcK covered by
- Gen 2 cephalosporn
- H. influenzae
- Enterobacter
- Neisseria
- Proteu
- E. coli
- Klebsiella
What cephalosporn used to treat meningitis and gonorrhea
Ceftriaxone
Anti-pseudomonal cephalosporin is
Ceftazidime
What is always administered with Carbapenems
Cilastatin to decrease inactivation of drug in renal tubules
Vanco used for
MRSA
C. difficile
Enterococci
Strep
Vanco toxicity
Nephro
Ototo
Thrombophlebitis
Aminoglycoside MOA
Inhibit formation of initiation complex and cause misreading of mRNA
Aminoglycoside toxicity
Nephro
NMJ blocker
Ototo
Teratogenic
Tetracycline MOA
Bind to 30S and prevents attachment of aminoacyl-tRNA
Macrolides MOA
inhibit protein synthesis by blocking translocation
Bind to the 23S rRNA of the 50S ribosomal subunit
MACROlide toxicity
- GI Motility issues
- Arrhythmia: Prolonged QT
- Cholestatic hepatitis
- Rash
- EOsinophilia
Chloramphenicol MOA
Blocks peptidyltransferase at 50S ribosomal subunit
Treat anaerobes above the diaphragm with
Clindamycin
Drugs causing phototoxicity
SAT
Sulfonamide
Amiodrone
Tetracycline
Avoid alcohol with Metronidazole due to
Disulfiram-like reacton
RIPE treatment of TB
- Rifampin
- INH
- Pyrazinamide
- Ethambutol
INH MOA
Decrease synthesis of Mycolic acid
INH of Isoniazid
Injuries Neurons and Hepatocytes
Rifamycin MOA
Inhibits DNA-dependent RNA polymerase
Rifampin’s 4 R’s
- RNA polymerase inhibitor
- Ramps up P-450
- Red/orange body fluid
- Rifampin ramps up P-450 but Rifabutin does not
Pyrazinamide toxicity
Hyperuricemia
Hepatotoxicity
Ethambutol blocks
Arbinosyltransferase
Ethambutol toxicity
Optic neuropathy (red-green color blindness)
Gonorrhea prophylaxis
Ceftriaxone
Pregnant woman with group B strep prophylaxis
Ampicillin
Prevention of postsurgical infection due to S. aureus
Cefazolin
Azoles MOA
Inhibit fungal sterol synthesis by inhibiting Cytochrome P-450 that converts Lanosterol to Ergosterol
Azole toxicity
- Testosterone synthesis inhibition
- Gynecomastia
- Increase with Ketoconazole
- Liver dysfunction
- Inhibition of P-450
Flucytosine MOA
Inhibits DNA and RNA biosynthesis by converstion to 5-FU
Echinocandins are
- Caspofungin
- Micafungin
- Anidulafungin
Echinocandins MOA
Inhibits cell wall synthesis by inhibiting synthesis of β-glucan
DOC for invasive aspergillosis and Candida
Caspofungin
Terbinafine inhibits
Squalene epoxidase
Chloroquine MOA
Blocks detoxification of heme into hemozoin
Build up of heme is toxic to Plasmodia
Chloroquine toxicity
Retinopathy
Pruritus
What drugs inhibit influenza neuraminidase leading to decrease the release of progeny virus
Zamamivir
Oseltamivir
Ribavirin used for
RSV
Chronic Hep C
Ribavirin toxicity
Hemolytic anemia
Teratogenic
-clovir MOA
Inhibits viral DNA polymerase by chain termination
Must be phosphorylated by Thymidine kinase
-clovir toxicity
Obstructive crystalline nephropathy
Acute renal failure
Given for CMV
Ganciclovir
Ganciclovir toxicity
- BM suppression
- Leukopenia
- Neutropenia
- Thrombocytopenia
- Renal toxicity
Foscarnet MOA
Viral DNA polymerase inhibitor that binds to the pyrophosphate-binding site
-navirs are
Protease inhibitor
NNRTIs
- Efavirenz
- Nevirapine
- Delavirdine
Integrase inhibitor
Raltegravir
SAFe Children Take Really Good Care are antibiotics to avoid in pregnancy
- Sulfa: Kernicterus
- AG: Ototoxicity
- Fluoroquinolones: Cartilage damage
- Clarithromycin: Embryotoxic
- Tetracyclines: Discolored teeth, inhibits bone growth
- Ribavarin
- Griseofluvin
- Chloramphenicol: Gray Baby