Fungal Infections Flashcards

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1
Q

What are mycosis

A

Infections caused by fungi

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2
Q

What mycotoxicosis

A

Conditions resulting from the ingestion of food contaminated with metablic products of funcig

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3
Q

What are the srouces of fungal infections

A

Commensal
Envirnoment
Inhalation
Traumatic innoculation

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4
Q

List hte 3 types of superficial infetions

A

Dermatophtes –> keratophilic, affect the skin, hair and nails
Candida –> affects, skin, nails and mucous membranes
Malassezia –> lipolphilic affects the skin

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5
Q

What are the 3 types of dermatophytes

A

Anthrophilic
Zoophilic
Geophilic

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6
Q

What genus causes the majority of Dermatophye infetison

A

Trychophytan and Microsporum

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7
Q

Is candida a yeast of mould

A

YEAST!!!

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8
Q

Who does candida cause nail infetions

A

Genearlly only in uncontrolled diabetes or a secondary nail infection frollowing dermatophytes

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9
Q

Who can get chronic mucocutaneous candidosis

A

Those who are immune deficient or with a problem in T cell activation

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10
Q

Give the examples ot subcutaneous infections

A

Sporothrix

Mycemtoma fungi

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11
Q

What inflammatory response do you get mycetoma fungi

A

Generally get granulomatous inflammatory response

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12
Q

GIve the 4 example species of deep fungal infections

A

Mucoromycosis
Aspergillosis
Cyptotococcosis
Candidiosis

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13
Q

Give an example of Mucromycosis

A

Saksenia Vasiformis –> often infects wounds and cuts causing necrosis of tissue origin

Often associated with bomb blast victims

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14
Q

What are the characteristic hyphae is mucoromycosis

A

Have long hyphae with sacs containing spores on the end

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15
Q

What is the definiing feature of cytpotoccus

A

It is a eyars that has a large polysaccharide capsule that may help in its evasion of the eimmune sytsem

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16
Q

Can cryptococcus lyse macrophages

A

NO

17
Q

What is the most common invasive fungal infection

A

Invasive candidasis

18
Q

What are the symptoms of invasive candidiasis

A

Osteomyelitis
Disseminated Candidisois
Oesophageal infection
Endocarditis

19
Q

Why is C. Albicans the most pathogenic candida

A

Produces germ tubes

Can lyse macrophages

20
Q

What is the worryign spread of which type of candida that orginiated in Japan

A

C. Auris

21
Q

What infections was C. auris associated with

A
Chronic otitis media
Pneumonias
Diabetic foot infections
Vulvovaginits
Mucosal infections
22
Q

What are all isolates of C. Auris so far resistant to

A

FLuconazoel

23
Q

Is aspergillus a mould or yeast

A

Mould

24
Q

What infections can aspergilous cause

A
Aspergilloma
Invasive Aspergillosis
Oncomychosis (aka tinea unguum)
Otitis Externa
Keratitis
Cutaneous lesion
25
Q

Name the pathogenic fungi that causes Valley Fever

A

Coccidiodes immitis
Found in the soil
Can create a mass in the lung that can mimic a lung tumour

26
Q

Name the fungi that can casue invasive disaese and is native to Northern and Central America, Eastern and Southern Europe, Eastern Asia, Australia

A

Histplasma Capsulatum

27
Q

How can histoplasma capsulatum cause disease

A

Generally subclinicla infection but can reamin alive in scattered pulmonary calcifications and cause serious infection when the patient becomes immunocompromised

28
Q

What species responsible for the largest ever fungal meningitis outbreak

A

Due to Exserohium species

A fungus that contaminated injectable steroids !! –> was relatively resistant to antifungals and grew well in the steroids caused 64 deaths!