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Gram-Negative Bacilli

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Microbiology | Registered Nurse (RN) School Study Aid

Gram-Negative Bacilli
18 Picmonics to Learn | 37 mins
Bacteroides Fragilis
Characteristics
Gram-Negative
Anaerobe
Normal Colonic Flora
Produces Vitamin K
Produces Gas in Tissue
Foul-Smelling
Signs and Symptoms
Gastrointestinal Abscess
Treatment
Penicillin-Resistant
Clindamycin
Metronidazole
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2 mins
Bartonella henselae
Characteristics
Gram-Negative
Pleomorphic
Bacillus
Signs and Symptoms
Cat Scratch Fever
Lymphadenopathy
Bacillary Angiomatosis
Patients with AIDS
Mimics Kaposi Sarcoma
Benign
Reactive Arthritis
Non-Caseating Granuloma
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2 mins
Klebsiella Disease
Signs and Symptoms
Aspiration Pneumonia
Alcoholics
Diabetics
Red Currant Jelly Sputum
Lung Abscess
Nosocomial Urinary Tract Infection
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2 mins
Klebsiella Characteristics
Characteristics
Gram-Negative
Bacilli
Oxidase-Negative
Intestinal Flora
Antiphagocytic Virulence Factor
Polysaccharide Capsule
Positive Quellung Reaction
Mucoid Colonies
Urease-Positive
Fast Lactose Fermenter
Pink on MacConkey Agar
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2 mins
E. coli Overview
Characteristics
Gram-Negative
Bacillus
Purple Colony with Metallic Green Sheen
Lactose-Fermenting
Pink on MacConkey Agar
Disease
Diarrhea
Lipid A Septic Shock
P Pili Pyelonephritis and Cystitis
K Capsule Neonatal Meningitis
K Capsule Pneumonia
H Antigen Flagella
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2 mins
Enterohemorrhagic E. Coli (EHEC)
Characteristics
O157:H7
Non-Sorbitol Fermenting
Hamburger Meat
Produces Shiga-like Toxin
Gram-negative
Lysogeny
Inactivates 60S Ribosome
Disease
Bloody Diarrhea
Hemolytic Uremic Syndrome (HUS)
Hemolytic Anemia
Acute Renal Failure
Thrombocytopenia
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2 mins
Shigella
Characteristics
Gram-Negative
Bacilli
Non Lactose Fermenting
White on Macconkey Agar
Oxidase Negative
Non H2S Producing
Day Care Centers
High Virulence
Replicates Intracellularly
Actin Rocket
Signs and Symptoms
Bloody Diarrhea
Shiga Toxin
Inhibits 60S Ribosome
Hemolytic Uremic Syndrome (HUS)
Hemolytic Anemia
Thrombocytopenia
Kidney Failure
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3 mins
Proteus Mirabilis
Characteristics
Gram-Negative
Bacillus
Oxidase Negative
Urease-Positive
Swarming Motility
Non-lactose Fermenting
Symptoms
Urinary Tract Infection
Struvite Crystals
Staghorn Kidney Stones
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2 mins
Pseudomonas Aeruginosa Disease
Signs and Symptoms
Pneumonia
Cystic Fibrosis
Burn Wounds
Hot tub folliculitis
Urinary Tract Infections
Osteomyelitis associated with IV drug use
Osteomyelitis from Shoe Puncture Wound
Diabetic Osteomyelitis
Corneal Infections in contact lens users
Endocarditis
Ecthyma Gangrenosum
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3 mins
Pseudomonas Aeruginosa Characteristics
Characteristics
Gram-Negative
Bacillus
Aerobic
Pyocyanin Pigment
Blue-green Pigment
Grape like odor
Non-lactose Fermenting
Polysaccharide Capsule
Catalase-Positive
Oxidase-Positive
Inactivates Elongation Factor 2
Exotoxin A
Endotoxin
Water sources
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3 mins
Rickettsia
Need CoA and NAD
Rocky Mountain spotted fever
Typhus
Ehrlichiosis
Q fever
Arthropod vector
Fever
Headache
Rash
Weil-Felix reaction
Treatment doxycycline
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1 min
Rocky Mountain Spotted Fever
Rickettsia rickettsii
Dermacentor Wood Tick
Endemic to East Coast
Fever
Headache
Rash Starts on Wrist and Ankle
Rash migrates towards the trunk
Thrombocytopenia
Hyponatremia
Elevated liver enzymes
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59 secs
Salmonella Overview
Pathophysiology
Gram-Negative Rod
Oxidase Negative
Non Lactose Fermenter
White on Macconkey Agar
H2S Producing
Flagella
Invades GI Tract
Peyer's Patches
Considerations
Osteomyelitis in Sickle Cell Patients
Reactive Arthritis
Antibiotics Prolong Fecal Excretion
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3 mins
Salmonella Typhi
Characteristics
Colonizes Gallbladder
Monocytic Immune Response
Symptoms
Typhoid Fever
Abdominal Pain
Rose Spots on Abdomen
Constipation Followed by Diarrhea
Treatments
Ceftriaxone
Fluoroquinolones
Considerations
Oral Vaccine - Live
IM Vaccine - Capsular Polysaccharide
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2 mins
Salmonella Enterica Spp.
Characteristics
Animal and Human Reservoir
Poultry and Eggs
Turtles
PMN Immune Response
Symptoms
Gastroenteritis
Diarrhea
Possibly Bloody
Treatments
No Antibiotics
No Vaccine Available
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2 mins
Yersinia Enterocolitica
Characteristics
Gram-Negative
Bacilli
Non-lactose Fermenting
Non-H2S Producing
Oxidase-Negative
Day Care Centers
Pork
Raw Milk
Pet (Puppy) Feces
Signs and Symptoms
Bloody Diarrhea
Mesenteric Adenitis
Granulomatous Microabscess in Mesenteric Lymph Nodes
Pseudoappendicitis (Mimics)
Reactive Arthritis
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2 mins
Burkholderia
Characteristics
Gram-Negative
Bacilli
Catalase-Positive
Oxidase Positive
Non-lactose Fermenting
Clinical Manifestations
Pneumonia
Associations
Cystic Fibrosis
Considerations
Often Multidrug Resistant
Contraindication
Contraindication to Undergo Lung Transplantation
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1 min
Escherichia coli Virotypes
EIEC
Enteroinvasive E. coli (EIEC)
Necrosis with Inflammation
Bloody Diarrhea
Clinical Presentation Similar to Shigella
ETEC
Enterotoxigenic E. coli (ETEC)
Heat Labile and Heat Stable Enterotoxin
Traveler with Watery Diarrhea
EPEC
Enteropathogenic E. coli (EPEC)
Blocks Absorption
Child with Watery Diarrhea
EHEC
Enterohemorrhagic E. coli (EHEC)
Produces Shiga-like Toxin
Ingestion of Undercooked Meat
Bloody Diarrhea
Hemolytic Uremic Syndrome (HUS)
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3 mins

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