Infectious Diseases Flashcards
Malaria: Most important parasitic disease in man
Malaria
Malaria: 72 hour cycle
P. Malariae
Malaria: Only Malignant Tertian
P. Falciparum
Malaria: RBC Preference: All ages
P. Falciparum
Malaria: RBC Preference: Old
P. Malariae
Malaria: Highest Parasitemia
P. Falciparum
Malaria: Lowest Parasitemia
P. Malariae
Malaria: 0 Merozoites
P. Falciparum
Malaria: Banana-Shaped Gametocytes
P. Falciparum
Malaria: Large & Round Gametocytes
P. Vivax
Malaria: Compact Gametocytes
P. Malariae
Malaria: Small & Round Gametocytes
P. Ovale
Malaria: Recrudescence
P. Falciparum & P. Malariae
Malaria: Relapse
P. Vivax & P. Ovale
Malaria: Prone to Drug Resistance
P. Falciparum
Malaria: Recurrence of symptoms after 2-4 week abatement
Recrudescence
Malaria: Return of disease after apparent cessation (1-6 months) due to reactivation of hypnozoites
Relapse
Malaria: Screen for presence of Malarial organisms
Thick smears
Malaria: Species identificaction
Thin smears
Malaria: Highest yield of thick and thin smears (Timing)
During fever or 2-3 hours after peak
Malaria: What do you call the Punctate granulation present in RBCs invaded by P. Ovale and P. Vivax
Schuffner dots
Malaria: Coarse granulations present in RBCs invaded by P. Falciparum
Maurer dots
Malaria: Fine dots present in RBCs invaded by P. Malariae
Ziemann dots
Malaria: Malarial or Durck granulomas
Cerebral Malaria
Malaria: Acute Renal Failure in Malaria
Blackwater Fever
Malaria: Septic Shock in Malaria
Algid Malaria
Malaria: Endemic: Palawan?
Yes
Malaria: Endemic: Mindoro?
No
Malaria: Endemic: Cebu?
No
Malaria: Endemic: Quezon?
No
Malaria: Endemic: Abra?
No
Malaria: Endemic: Kalinga?
Yes
Malaria: Endemic: Apayao?
Yes
Malaria: Endemic: Nueva Ecija?
No
Malaria: Endemic: Agusal Del Sur?
Yes
Malaria: Endemic Provinces?
Palawan, Kalinga, Apayao, Ifugao, Agusan del Sur
Typhoid Fever: Stepwise Fever, Relative Bradycardia, Bacteremia, Anorexia, Malaise
Week 1
Typhoid Fever: Abdominal Symptoms, Rose Spots, Jaundice, Hepatosplenomegaly
Week 2
Typhoid Fever: Bleeding, Ileitis, Pneumonia
Week 3
Typhoid Fever: Recovery or Death
Week 4
Typhoid Fever: Week 1
Blood
Typhoid Fever: Week 2
Urine
Typhoid Fever: Rose Spots
Week 2
Typhoid Fever: Stool
Week 3
Typhoid Fever: Week 4
Bone Marrow (Always)
Typhoid Fever: Incubation period of Typhoid
5-21 days
Typhoid Fever: Week of Complications (Typhoid)
Week 3
Typhoid Fever: Antibiotics used in the Philippines
Ceftriaxone (resistant), Quinolones (susceptible)
Typhoid Fever: Eradice Salmonella carriage in the GB
Ampicillin
Leptospirosis : Most severe form
Weil Syndrome
Leptospirosis: Most common cause of death
Massive Pulmonary Hemorrhage
Schistosomiasis: Penetrates Skin
S. Japonicum
Schistosomiasis: Affects Liver
S. Japonicum, C. Sinensis
Schistosomiasis: Affects Lung
P. Westermani
Schistosomiasis: Raw Crab Ingestion
P. Westermani
Schistosomiasis: Raw Fish Ingestion
C. Sinensis
Schistosomiasis: Intermediate Host: S. Japonicum
Snail
Schistosomiasis: Intermediate Host: P. Westermani
Snail and Crab
Schistosomiasis: Intermediate Host: C. Sinensis
Snail and Fish
Schistosomiasis: Treatment
Praziquantel
Schistosomiasis: Systemic Hypersenstivity in Schistosomiasis
Katayama Fever
Schistosomiasis: Resembles Serum Sickness
Katayama Fever
Schistosomiasis: Endemic: Sorsogon
Yes
Schistosomiasis: Endemic: Samar
Yes
Schistosomiasis: Endemic: Leyte
Yes
Schistosomiasis: Endemic: Occidental Mindoro
No
Schistosomiasis: Endemic: Oriental Mindoro
Yes
Schistosomiasis: All of Mindanao Except
Misamis Oriental
Anaerobic, Gram-Positive, Spore-Forming Rod
C. Tetani
Resembles a Tennis Racket
C. Tetani
Negri Bodies
Rabies
Rabies Fatality
Early Brainstem Dysfunction
Presence of Microbes or Toxins in Blood
Septicemia
2 or more of the ff: Fever, Tachypnea, Tachycardia, Leukocytosis
SIRS
SIRS + Positive Blood Culture
Sepsis
Sepsis with hypotension despite ADEQUATE fluid resuscitation
Septic Shock
Sepsis that does not respont to fluids or pressors
Refractory Septic Shock
Dysfunction of more than one organ, requiring interention to maintain homeostasis
MODS
SIRS Criteria: Fever
> 38 or
SIRS Criteria: Tachypnea
> 24
SIRS Criteria: Tachycardia
> 90
SIRS Criteria: Leukocytosis
> 12 or 10% Bands
Vancomycin
Bactericidal
Fluoroquinolones
Bactericidal
Penicillins
Bactericidal
Aminoglycosides
Bactericidal
Metronidazole
Bacteriostatic
Erythromycin
Bacteriostatic
Clindamycin
Bacteriostatic
Sulfamethoxazole
Bacteriostatic
Trimethoprim
Bacteriostatic
Tetracycline
Bacteriostatic
Chloramphenicol
Bacteriostatic
Sulfamethoxazole
Bacteriostatic
Static + Static
Cidal
Side Effect: Pen G
Hypersensitivity
Side Effect: Methicillin
Interstitial Nephritis
Side Effect: Ampicillin
Pseudomembranous Colitis
Side Effect: Ticarcillin/Piperacillin/Cabenicillin
Hypertension, Hypervolemia, Bleeding
Drug Class: Methicillin
Penicillinase-Resistant
Drug Class: Ampicillin
Extended Spectrum
Drug Class: Pen G
Narrow Spectrum
Drug Class: Anti-pseudomonal
Ticarcillin/Piperacillin/Cabenicillin
Nafcillin
Staph Infections
Pen V
Oral (Vunganga)
Killed by Amoxicillin
H. Influenzae, E. Coli, L. Monocytogenes, P. Mirabilis, Salmonella, Enterococci (HELPS E)
Most effective Cephalosporin against Pseudomonas
Ceftazidime
Best Penetrance to BBB
Ceftriaxone
Disulfiram Reaction
Cefamandole, Cefoperazone, Cefmetazole, Cefotetan
High Bone Penetration
Cefazolin
Surgical Prophylaxis
Cefazolin
1st Gen. Cephalosporin Coverage
KEPs (Klebsiella, E. Coli, Proteus)
2nd Gen. Cephalosporin Coverage
HEN has KEPs (KEPs + H. Influenza, Enterobacter Aerogenes Neisseria)
Anti-Pseudomonal
Ceftazidime, Cefepime, Cefoperazone
Side Effect: Chloramphenicol
Gray Baby Syndrome, Aplastic Anemia
Side Effect: Tetracycline
Tooth Enamel Discoloration, Photosensitivity
Side Effect: Erythromycin
Diarrhea, Cholestatic Jaundice
Side Effect: Clindamycin
Pseudomembranous Colitis
DOC for Vancomycin Resistance
Linezolid
DOC for Resistant Gonorrhea
Spectinomycin
Prototype Aminoglycoside, 30s
Gentamicin
Aminoglycoside: Ocular Infections
Tobramycin
Aminoglycoside: Widest spectrum of activity, Narrow Therapeutic Window
Amikacin
Tx of Hepatic Encephalopathy
Neomycin
Important Points on Aminoglycosides
Requires O2, Doesn’t work in Anaerobic conditions
Sulfamethoxazole: MOA
Blocks Dihydropteroate Synthase
Trimethoprim: MOA
Blocks Dihydrofolate Reductase
Side Effect: TMP-SMX
SJS, TEN, Kernicterus
Side Effect: Ciprofloxacin
Tendinitis
Anaerobic Coverage: Quinolones
Moxifloxacin (Also for ocular infections)
Side Effect: Gatifloxacin
Diabetes Mellitus
Respiratory Quinolone
Levofloxacin
UTI and GIT Infections (Quinolone)
Ciprofloxacin
Isoniazid: MOA
Inhibits mycolic acid synthesis
Rifampicin: MOA
Inhibits DNA-dependent RNA polymerase
Ethambutol: MOA
Inhibits arabinoglactan synthesis
Static but Cidal on actively dividing MTB
Pyrazinamide (Most Hepatotoxic)
Side Effect: Streptomycin
Nephrotoxic, Ototoxic
Potent CYP450 Inhibitor (Anti-TB Drug)
Isoniazid
Side Effect: Drug-Induced Lupus
Isoniazid
Side Effect: Red-Orange Urine
Rifampicin
Potent CYP450 Inducer (Anti-TB Drug)
Rifampicin
Dapsone: MOA
Inhibits Folate Synthesis
Side Effect: Dapsone
Methemoglobinemia
Delays Onset of Dapsone Resistance
Rifampicin
Side Effect: Clofazimine
Skin Discoloration
Most Active Drug Against M. Leprae
Dapsone
Silver bullet against gram negative bacteria (Anti-Pseudomonal)
Aztreonam
Beta-Lactamase Inhibitor
Clavulanc Acid
Side Effect: Metronidazole
Disulfiram reaction, metallic taste, CNS toxicity
Side Effect: Nitrofurantoin
Pulmonary Fibrosis (UTI treatment)
Drugs of Last Resort
Imipenem, Amikacin, Meropenem, Linezolid, Streptogramins, Vancomycin (I AM your Last Shot at Victory)
Antifungal: Most Efficacious
Amphotericin B (Side Effect: Nephrotoxic)
Antifungal: Treatment of Dermatophyton
Ketoconazole (Side Effect: Gynecomastia, CYP450 inhibitor)
Antifungal: Treatment and Prophylaxis of Candidiasis and Cryptococcosis
Fluconazole
Griseofulvin: MOA
Interferes with fungal microtubules
Nystatin: Use
Candidiasis (Swish and Swallow or Suppository)
Treatment of HSV and VZV
Acyclovir (Side effect: Crystalluria)
CMV Treatment
Ganciclovir
Requires activation by Thymidine Kinase
Acyclovir, Gancyclovir
Treatment of HSV, VZV, and CMV
Foscarnet (Does not require activation)
Influenza A Coverage
Amantadine
Amantadine: MOA
Prevents viral uncoating
Side effect: Amantadine
Cerebellar dysfunction, Livedo reticularis
Oseltamivir: MOA
Neuraminidase inhibitor
DOC: Influenza
Oseltamivir
Treatment of Hepatitis B
Lamivudine
Treatment of Hepatitis C and RSV
Ribavirin
Pyrophosphate Analog
Foscarnet
NRTI, Requires phosphorylation, Primary drug for HIV, Prevents vertical transmission of HIV
Zidovudine
NNRTI, No phosphorylation required
Delavirdine
Protease inhibitor
Indinavir
Fusion inhibitor, Binds gp41 subunit
Enfuvirtide
Binding inhibitor, CCR5 antagonist
Maraviroc
Side Effect: Delavirdine
Hepatotoxicity
Side Effect: Zidovudine
Lactic Acidosis
Side Effect: Indinavir
Fat Redistribution Syndome, Hyperlipidemia, Insulin Resistance
NNRTIs
Nevirapine, Efavirenz, Delavirdine
Protease Inhibitor
All protease inhibitors end with-navir
Primary drug for malaria, Prevents heme polymerization into hemozoin
Cholorquine
Chloroquine-resistance, Severe malaria, DOC for pregnant patients with Malaria
Quinine
Eradication of hypnozoites of P. Vivax and P. Ovale
Primaquine
Chemoprophylaxis (Chloroquine-resistant)
Mefloquine, Malarone
Side Effect: Chloroquine
Retinal Damage, Hearing Loss
Side Effect: Quinine
Hypoglycemia, Blackwter Fever, Cinchonism
Chemoprophylaxis (Multi-drug resistant)
Doxycycline
DOC for malaria in the Philippines (P. Falciparum)
Co-artem
Antiprotozoal Drugs: Diloxanide Furoate
Asymptomatic Cyst Carriers of E. Histolytica
Antiprotozoal Drugs: Metronidazole
Amoebic Dysentery, Trichomoniasis, Bacterial Vaginosis
Antiprotozoal Drugs: Nitazoxanide
Cryptosporidium Parvum Infection
Antiprotozoal Drugs: TMP-SMX
Pneumocystis Jiroveci Pneumonia
Antiprotozoal Drugs: Pyrimethamine-Sulfadiazine
Toxoplasmosis
Antiprotozoal Drugs: Suramin + Melarsoprolol
African Sleeping Sickness
Antiprotozoal Drugs: Nifurtimox
Chagas Disease
Antiprotozoal Drugs: Stibogluconate
Leishmaniasis
Mebendazole
Inhibits helminthic microtubules, Ovicidal
Albendazole
Inhibits helminthic microtubules, Ovicidal and Larvicidal
DOC for hydatid disease
Albendazole
DOC for Filaria and Loa Loa SE: Filarial Fever
Diethylcarbamazine
DOC for Strongyloides and Onchocerca SE: Mazzoti reaction
Ivermectin
DOC for Enterobius
Pyrantel Pamoate
DOC for Trichinosis
Thiabendazole
DOC for Trematodes and Cestodes except echinococcosis
Praziquantel
Niclosamide
Back-up drug to Praziquantel
1 Primary Stain
Crystal Violet
2 Mordant
Iodine
3 Decolorizer
Acetone
4 Counterstain
Safranin
Acid Fast Stain
Mycobacteria (Too much Lipid)
Dark Field Microscopy
Spirochetes (Too thin)
None (Serologic Studies)
Mycoplasma (No cell wall)
Silver Stain
Legionella (Poor uptake of counterstain)
Inclusion Bodies
Chlamydiae (Intracellular)
Giemsa/Tissue Stains
Ricketssiae (Intracellular)
All bacteria have cell walls composed of Peptidoglycan Except
Mycoplasma Pneumoniae
All gram-positive bacteria have NO endotoxin Except
Listeria Monocytogenes
All bacterial capsules are composed of polysaccharide Except
Bacillus Anthracis
All exotoxins are heat-labile Except
Staphylococcal Enterotoxin
Obligate Aerobes
Nocardia, Bacillus Cereus, Neisseria, Pseudomonas, Bordetella, Legionelle, Brucella, Mycobacterium
Facultative Anaerobes
Staph, Bacillus Anthracis, Corynebacterium, Listeria, Actinomyces, Mycoplasma
Microaerophiles
Streptococcus, Spirochetes (Borellia, Leptospira Treponema), Campylobacter
Obligate Anaerobes
Clostridium, Bacteroides
Egg Yolk
Clostridium Perfringens
Corynebacterium Diphtheriae
Tellurite
Group D Streptococcus
Bile Esculin
Staphylococci
Mannitol Salts
N. Meningitidis, N. Gonorrhea (Sterile)
Chocolate Agar
N. Gonorrhea (Non-Sterile)
Thayer Martin
H Influenzae
Chocolate + X and V
Mycobacterium Tuberculosis
Lowenstein-Jensen
Vibrio Cholerae
Thiosulfate Citrate Bile Salts (TCBS)
Bordetella Pertussis
Bordet-Gengou
Legionella Pneumophila
Charcol-Yeast Extract
Campylobacteria Jejuni
Skirrows
Mycoplasma Pneumoniae
Eaton
P. Aeruginosa
Cetrimide
Slmonella, Shigella
XLD
Leptospira Interrogans
EMJH