Microbiology: Fungal Infections/Anti-Fungals/Herpes Infections Flashcards
Fungal Infections
Who are particularly vulnerable to fingal infections?
Why can they be difficult to diagnose?
What is the classification of fungal infections?
Fungal Infections
What are the key superficial fungal infections and how are they diagnosed?
Fungal Infections
What are the key deep fungal infections and how are they diagnosed?
Diagnosed: clinical details, lab results and imaging
Main types:
- Candida
- Aspergillus
- Cryptococcus
Antifungals
What are the targets and indications of:
- Polyene
- Azole
- Terbinafine
- Flucytosine
- Echinocandin
Herpes Infections
What are the classifications of Herpes infections?
Herpes Infection Classifications:
-
Epitheliotropic
- CMV
- Infected cells swell (hence megavirus)
- Roseola virus
- CMV
-
Neurotropic
- HSV1 & HSV2: dsDNA. No animal reservoir. Persistent latent phase in DRG. Lytic infection of fibroblasts + epithelial cells. Transmitted via muco-cutaneous contact
-
VZV:dsDNA. Droplet spread. Viral replication in LNs, then in liver + spleen then vesicular rash (rash ~48hrs after infection). 14/7
- Shingles
- Chickenpox
-
Lymphocytic
- EBV
- HHV8
Herpes Infections
What are the symptoms of the following:
- Asymptomatic CMV
- Congenital CMV
Congential: LIMITED JHCC:
- Late progressive sensorineural deafness
- IUGR
- Microcephaly
- Impaired IQ
- Thrombocytopenia
- Encephalitis
- Death
- Jaundice
- Hepatosplenomegaly
- Chorioretinitis
- Cytomegalic inclusion disease (13%)
Herpes Infections
What are the symptoms of the following:
- CMV Mononucelosis
- Immunocompromised CMV
Immunocompromised CMV: “GRAPH/GRAF B”
- GI: colitis
- Retinitis (Retinitis=AIDS)/Radiculopathy
- Addisons disease
- Pneumonitis (in BMT patients)
- Hepatitis
- Fever
- Bone Marrow supression
Herpes Infections
What is/are the aetiology, investigations and treatment of Cytomegalovirus?
Investigtions: STICHH
-
Serology
- Immunocompromised: limited diagnostic value
- Immunocompitent: CMV IgM & IgG (IgG low avidity in first infection)
- Tissue
- Immunoflourescence
- Cell culture
- Histopathology
-
Heterphile Antibodies
- Paul Bunnel monospot: clumping of sheep RBCs
Herpes Infections
What are the symptoms investigations and management of Roseola infections?
Herpes Infections
What are the features of oral HSV1/HSV 2 infections?
Herpes Infections
What are the features of ocular HSV1/HSV 2 infections?
Herpes Infections
What are the features of genital HSV1/HSV 2 infections?
Herpes Infections
What are the symptoms of Encephalitis from HSV1/HSV2 infections?
Herpes Infections
What are the symptoms of skin infections from HSV1/HSV2 infections?
Herpes Infections
What are the CT/MRI findings in Encephalitis from HSV1/HSV2 infections?