11 results
Septic Arthritis - Pathogens and Clinical Clues

Staphylococcus aureus 
Streptococcal spp. 
Neisseria gonorrhoeae 
Aerobic/Anaerobic 
Gram-negative bacteria 
Brucellosis
Septic Arthritis - Pathogens ... Anaerobic Gram-negative ... bacteria Brucellosis ... Fungal spp. ... #Differential #
Microorganisms Responsible for Infective Endocarditis

Native valves:
 - Streptococcus viridans 
 - Enterococci 
 - Other streptococci
bacilli - Fungi ... bacilli - Fungi ... #Endocarditis #Bacteria ... #Pathogens #Diagnosis ... #Differential #
Infective endocarditis - etiology and sources of infection. 
 • Native and prosthetic 
valve endocarditis
 •
Native and ... Sources #Causes #Bacteria ... #Etiology #Differential ... #Microbiology # ... Diagnosis #Pathogens
Fungal Biomarkers: Beta-D-Glucan and Aspergillus Galactomannan
Beta-D-Glucan:
 • Polysaccharide cell wall component of many fungi
 • Pathogens:
Pathogens: Candida ... Coccidioides - Negative ... Cryptococcus - Negative ... BAL GM does not differentiate ... Galactomannan #diagnosis #comparison
Diarrhea Workup and Management Algorithm in Transplant Patients
First Tier Microbiologic-Testing:
1. C. difficile PCR (Stool)
2. CMV qPCR
Bacterial culture ... range of enteric pathogens ... Breath test for bacterial ... above testing negative ... Transplant #diagnosis #differential
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
blood culture negative ... Tropheryma whipplei, Fungi ... under BCNIE, these bacteria ... BCNIE #Causes #differential ... InfectiousDiseases #Microbiology
Prevalence (Mean Percentage of Positive Specimens) of Various Respiratory Pathogens From Sinus Aspirates in Patients With
Various Respiratory Pathogens ... Patients With Acute Bacterial ... aureus • Gram-negative ... #microbiology # ... differential #diagnosis
(1,3)-β-d-glucan
Abundant cell wall polysaccharide, found in most fungi, except cryptococci, zygomycetes (mucor, rhizophus) and blastomyces.
Sensitivity 64%-93%;
found in most fungi ... 87%-100% False Negatives ... Positives: • Bacteremia ... #diagnosis #laboratory ... #microbiology #
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
Blood Culture-Negative ... cultures remain negative ... or fungi (grows ... PCR for specific pathogens ... Endocarditis #diagnosis #differential
1,3-Beta-D-Glucan and Galactomannan Testing Sensitivity Specificity and False Positives
1,3-Beta-D-Glucan
 • Cell wall component of many fungi
component of many fungi ... Almost always negative ... Infections with certain bacteria ... in BAL does not differentiate ... FalsePositives #Laboratory