#scedosporium typically occurs in immunocompromised individuals or post trauma
-CNS infection in immunocompetent post near-drowing
-Found in soil, fresh water especially stagnant or polluted water
#scedosporium apiospermum is the most commont sp infecting humans. Identification typically by DNA sequencing. Dx: culture recovering from infected site. Because airway may be colonized, sputum cultures may not reflect infection
#scedosporium voriconazole likely the most effective agent
#scedosporium#prolificans disseminated (severely immunosuppressed)), B&J infection. May cause onychomycosis & infections of eye/wounds. Localized infections in immunocompetent post trauma. Organism in soil and can colonize respiratory tract. No effective tx. Consider vori+ampho
#idboardreview 2 kidney transplant recipients post day 20 present w/ altered mental status, neutrophilic pleocytosis, MRI ring enhancing lesion. No improvement on abx & antivirals. Same donor died w/ dx of ADEM/exposure to wading pool. Diagnosis? #medEd#idmesEd#idtwitter
#Balamuthia amebas can infect skin, brain & other organs of the body. Can begin with skin wound on face, trunk, or limbs & progress to granulomatous amebic encephalitis (GAE).
Diagnosis of Balamuthia GAE can be difficult because symptoms are not specific to GAE
#acanthamoeba rapidly progressive meningoencephalitis & uncontrollable cerebral edema, resulting in death from increased intracranial pressure w/in few days after presentation & no response to broad-spectrum abx, antiviral, antifungal, and immune-modulation therapies
#idboardreview 70 F presents w/ fever, myalgia, dyspnea: CXR RLL pneumonia/effusion, resp fail leading to death. Her dog recently died who was seen with rabbit caracass. Diagnosis? #medEd#idmedEd#idtwitter
#idboardreview 40 F multiple sclerosis on natalizumab presents w/ coordination difficulties and cognitive impairment. MRI non-enhancing subcortical white matter frontal lesions hyperintense on T2 & hypointense on T1. Diagnosis? #medEd#idmedEd#IDtwitter
#idboardreview 50 F recent dental infection presents 4d of fever, R headache, L weakness. MRI ring enhancing lesion & aspirate w/ GPC ‘balls of yarn’ 🧶 diagnosis? #medEd#idmedEd#IDtwitter
MRI demonstrate a ring enhancing lesion in R frontal lobe with vivid central restricted diffusion. The enhancing component has a complete low T2 rim #brain abscess Ref: radiopaedia.org/cases/cerebral…
#idboardreview 50 M unstable housing presents w/ fever, hip & knee pain and swelling. Knee aspirate shows gram negative rod in chains w/ lateral bulbar swelling. Diagnosis? #medEd#idmedEd#IDTwitter
#Streptobacillus moniliformis, the etiologic agent of rat-bite fever
#Streptobacillus moniliformis highly pleomorphic, filamentous GNR nonmotile, non–acid-fast; may be fusiform & develop lateral bulbar swellings. 2 variants: L form: cell wall deficient nonpathogenic. Spontaneous conversion between 2 forms may be responsible for clinical relapses