12 results
Microorganisms Responsible for Infective Endocarditis

Native valves:
 - Streptococcus viridans 
 - Enterococci 
 - Other streptococci
Histoplasma) - Culture ... streptococci - Culture ... Endocarditis #Bacteria #Pathogens ... #Diagnosis #Differential ... #InfectiousDiseases
Causes of blood culture negative infective endocarditis

Bartonella spp, Brucella spp, Coxiella burnetii, Chlamydia spp, Tropheryma whipplei,
negative infective ... nutritionally variant ... BCNIE #Causes #differential ... #negative #Endocarditis ... #InfectiousDiseases
Causes of Primary and Secondary Amenorrhea - Differential Diagnosis Algorithm
Primary Amenorrhea - No onset of menarche
Secondary Amenorrhea - Differential ... Normal FSH • Ovarian ... Hypothalamic - Negative ... Secondary #Amenorrhea #Differential ... Causes #OBGyn #Gynecology
Blood Culture-Negative Infective Endocarditis (BCNIE)
Definition: No etiology found after 3 separate blood cultures remain negative for
Blood Culture-Negative ... nutritionally variant ... PCR for specific pathogens ... Endocarditis #diagnosis #differential ... #workup #infectiousdiseases
Causes of Secondary Amenorrhea - Differential Diagnosis Algorithm
Absence of menses for more than 3 cycles or
Secondary Amenorrhea - Differential ... menstruating Ovarian ... Hypothalamic - Negative ... Secondary #Amenorrhea #Differential ... Causes #OBGyn #Gynecology
Causes of Culture Negative Abscess - Differential Diagnosis Framework
Consider prior antibiotics as a cause of a
Causes of Culture ... Negative Abscess ... - Differential ... #Differential # ... Diagnosis #InfectiousDiseases
Psittacosis 
Pathogen: Chlamydia psittaci - obligate intracellular gram negative
Transmission:
 • Birds are the primary reservoir
 •
Psittacosis Pathogen ... intracellular gram negative ... test • PCR • Culture ... management #treatment #infectiousdiseases
Capnocytophaga
Pathogen: Capnocytophaga
 • 9 species, C. canimorsus responsible for the majority of infections
 • Gram-negative rod,
Capnocytophaga Pathogen ... infections • Gram-negative ... microorganism (Culture ... fusiform gram-negative ... microbiology #zoonotic #infectiousdiseases
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 ... above testing negative ... Transplant #diagnosis #differential
Endocarditis Summary

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV substance use
• IV catheter
• Recent
Pancreas, Gastric & Ovarian ... 90% of IE cases Culture ... • Coagulase-negative ... Marantic (NTBE) Differential ... • Blood cultures