Lecturer name dr ahmed m albarrag lecture date oct 2012
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Lecturer name: Dr. Ahmed M. Albarrag Lecture Date: Oct-2012. Lecture Title: Diversity of Fungi and Fungal Infections. (Foundation Block, Microbiology) . Mycotic Diseases. Hypersensitivity (Allergy) Mycotoxicoses Infections. Mycotic Diseases. How the infection is acquired?

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Lecturer name dr ahmed m albarrag lecture date oct 2012

Lecturer name:

Dr. Ahmed M. Albarrag

Lecture Date: Oct-2012

Lecture Title:

Diversity of Fungi and Fungal Infections

(Foundation Block, Microbiology)


Mycotic diseases

Mycotic Diseases

Hypersensitivity (Allergy)

Mycotoxicoses

Infections


Mycotic diseases1

Mycotic Diseases

How the infection is acquired?

Colonization (normal flora)

Inhalation (Airborne)

Contact

Ingestion

Trauma


Mycotic diseases2

Mycotic Diseases

Healthy host?

OR

Immunocompromised host?

(When, which type of infection)


Types of fungal infections mycoses

Types of fungal infections ( Mycoses)

  • Superficial mycoses

  • Cutaneous mycosis

  • Subcutaneous mycoses

  • Systemic mycoses

  • Opportunistic mycoses


Types of fungal infections mycoses1

Types of fungal infections ( Mycoses)

  • Healthy Host

  • Superficial mycoses

  • Cutaneous mycosis

  • Subcutaneous mycoses

  • Systemic mycoses

  • Immunocompromised Host

    • Superficial mycoses

    • Cutaneous mycosis

    • Subcutaneous mycoses

    • Systemic mycoses

    • Opportunistic mycoses


Types of fungal infections mycoses2

Types of fungal infections - Mycoses

  • Superficial Mycoses

    • Affect the outer layer of the skin or hair shaft

    • No immune response

  • Cutaneous Mycoses

    • Dermatophytosis

      • Infection of the skin, hair or nails caused by a group of keratinophilic fungi, called dermatophytes


Types of fungal infections mycoses3

Types of fungal infections - Mycoses

  • Cutaneous Mycoses

    • Dermatophytosis

      • Infection of the skin, hair or nails caused by a group of keratinophilic fungi, called dermatophytes


Types of fungal infections mycoses4

Types of fungal infections - Mycoses

  • Subcutaneous Mycoses

  • Fungal infections involving the dermis, subcutaneous

  • tissues, muscle and may extend to bone.

  • Usually they are initiated by trauma to the skin.


Types of fungal infections mycoses5

Types of fungal infections - Mycoses

  • Opportunistic fungal infections

  • Diseases in immunocompromised host

  • Risk factors

    • HIV/AIDS

    • Malignancies

    • Organs transplantation

    • Diabetes

    • Many others


Lecturer name dr ahmed m albarrag lecture date oct 2012

The Fungi

  • Primary Pathogens

    • Dermatophytes

  • Opportunistic Fungi

    • Normal flora

      • Candida spp.

      • Other yeast

  • • Endemic geographically restricted fungi

  • Ubiquitous in our environment

    • Aspergillus spp.

    • Zygomycetes spp.

    • Cryptococcus spp.

    • Many others


Diagnosis of fungal infection

Diagnosis of fungal infection

Clinical features (history, risk factors, etc)

Imaging

Good value in diagnosis and therapy monitoring

Lab Investigations

Histopathology

Microbiology


Lab diagnosis

Lab Diagnosis

Direct Microscopy

1. Potassium Hydroxide (10-20% KOH)

2. Fungal stains:

Giemsa Stain

Grocott’s Methenamine Silver stain (GMS)

India ink

Culture

Fungal media: Sabouraud Dextrose Agar (SDA), other media if needed.

Serology: (Detection of Antigen and/or Antibody)

PCR: (Detection of Fungal DNA)


Lecturer name dr ahmed m albarrag lecture date oct 2012

Clinical samples

Microscopy

Culture

Fungal hyphae or other fungal element

Yeast

Mold

Yeast

+/-

pseudohyphae

No growth

Negative


Antifungal agents

Antifungal agents


Dr ahmed m albarrag oct 2012

Dr. Ahmed M. Albarrag

Oct-2012

Thank You 

(Foundation Block, Microbiology)


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