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Bacteriology I Final Review > Subcutaneous Mycoses > Flashcards

Subcutaneous Mycoses Flashcards

1
Q

Subcutaneous Mycoses

Habitat

A

Soil, plants, organic debris, etc

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2
Q

Subcutaneous Mycoses

Transmission

A

Contaminated thorns

Implantation into traumatized skin (spores)

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3
Q

Subcutaneous Mycoses

Lesions

A

Abscesses
Nonhealing ulcers
Draining sinus tracts

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4
Q

Sporothrix schenckii

Characteristics

A

Dimorphic fungus

Causes Sporotichosis

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5
Q

Sporothrix schenckii

Habitat

A

Soil, vegetation, and wood

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6
Q

Sporothrix schenckii

Host species

A

Humans, horses, dogs, and cats

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7
Q

Sporothrix schenckii

Pathogenesis

A

Infection of the extremities via trauma
Ulcerating nodules along the superficial lymphatic vessels
Lymphangitis—thickened and cordlike vessels
(skin and lymphatic vessels)

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8
Q

Equine SPorothricosis

A

Hard cutaneous nodules along the lymphatic, ulcerating and draining (cigar shaped yeasts cells)

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9
Q

Feline Sporothricosis

A

Mainly male cats, draining puncture wounds, head or tail base (cigar shaped yeasts cells)

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10
Q

Pythium insidiosum

A

Causes: Mycotic Swamp Cancer, Florida Horse Leeches
- Aquatic plant fungus
Host: humans, horses, dogs and cattle

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11
Q

Mycotic Swamp Cancer

Pathogenesis

A

Invasion of traumatized skin or intestinal mucosa by motile zoospores
Germination of zoospores to form aseptate hyphae
Pyogranulomatous lesions with fistulous tracts discharging purulent exudate

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12
Q

Myotic Swamp Cancer

Equine pythiosis

A

mostly cutaneous lesions
Ex: Draining mass on the rear leg of a horse
Ex: Granular, irregularly-shaped yellow “kunkers” w/n the mass

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13
Q

Myotic Swamp Cancer

Canine pythiosis

A

Mostly alimentary tract lesions

EX; Granulomatus Gastritis

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14
Q

Myotic Swamp Cancer

Laboratory Diagnosis

A

Lactophenol Cotton Blue Stain

Masses of hyphae

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15
Q

Aspergillus Species

Characteristics

A

aerobic,

Saprophytic moulds with septate hyaline hyphae. Unbranched conidiophores are formed from phialides borne on vesicles

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16
Q

Aspergillus funigatus

Pathogenesis

A

Inhalation or ingestion
Primary lesions occur in the respiratory tract
Possible dissemination via the bloodstream
Lesions: granulomatous lesions [yellowish-gray nodules]

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17
Q

Aspergillosis BIRDS

A

Brooder pneumonia and airsacculitis in Respiratory Tract

18
Q

Aspergillosis Horses

A

Guttural pouch mycosis, keratitis, intestinal aspergillosis

19
Q

Aspergillosis Cattle

A

Muycotic abortion, Mycotic penumonia, Mycotic mastitis

20
Q

Aspergillosis Dogs

A

Otitis externa
Chronic rhinks
Aspergilosis with thrombosis of vessels

21
Q

Aspergillosis

A

Immunocompromised humans with prolonged antibiotics involve the lungs and skin of inhalation of spores can lead to a hypersensitive state

22
Q

Avain Aspergillosis (Brooder Penumonia) Transmission

A

Inhalation

23
Q

Avain Aspergillosis (Brooder Penumonia) Clinical Findings

A

Acute: Gasping, loss of appetite, paralysis or convulsions
Chronic: Emaciation, cyanosis, etc

24
Q

Avain Aspergillosis (Brooder Penumonia) Pathology

A

Yellowish-grean granulomatous plaques

25
Q

Laboratory Diagnosis for Aspergillosis of

A

Conidophore and Conidiospores

26
Q

Fungal Dimorphism

A 
Mold Form (25C to 30C) 
Yeats or spherule form (35 to 37)
27
Q

Blastomyces dermatitidis

A

Causes: North American Blastomycosis in humans and dogs

28
Q

North American Blastomycosis in humans and dogs

Epidemiology

A

Found in acid soil enriched with manure and other organic matter
Inhalation of aerosolized conidia

29
Q

Blastomycosis

Pathogensis

A

Primary lesions: Lungs
Hematogenous dissemination
Eye, skin, liver, CNS, etc
Granulomatous lesions

30
Q

Blastomycosis Clinical Findings

A

Dogs: Fever, weight loss, chronic cough, dyspnea, etc

31
Q

Blastomycosis

Laboratory Diagnosis

A

FA stain: Fluorecing Budding Yeast Cells

32
Q

Coccidioides immitis

A

Causes Coccidioidomycosis in dogs, horses and humans [San Joachim Valley Fever]

33
Q

Coccidioidomycosis in dogs, horses and humans [San Joachim Valley Fever]
Epidemiology

A

Arid soils

Inhalation of arthrospores

34
Q

Coccidioidomycosis

Pathogenesis

A

Lungs: Primary lesions
Hematogenous dissemination
Lesions: Granulomatous nodules

35
Q

Coccidioidomycosis

Laboratory Diangnosis

A

Barrel-Shaped Arthrospores

PAS stain, Spherule

36
Q

Histoplasmosis capsulatumm

A

Causes: Histoplasmosis in humans, dogs and cats

37
Q

Histoplasmosis in humans, dogs and cats

Epidemiology

A

Found in soils enriched with bat or bird feces

Inhalation of airborne conidia

38
Q

Histoplasmosis

Pathogenesis

A

Intracellular fungus—replicates in monocytes and macrophages
Primary lesions: Lungs
Hematogenous spread
Infection of intestine, liver, etc

39
Q

Histoplasmosis

Clinical Presentations

A

Many infected dogs don’t get sick.
Some develop mild to severe respiratory and/or gastrointestinal disease,
with breathing difficulties, fever, weight loss, vomiting, muscle wasting, coughing and intractable diarrhea

40
Q

Feline Histoplasmosis

Transmission

A

Enters an animals intestinal tract after being ingested through contaminated soil or bird

41
Q

Feline Histoplasmosis

Clinical Presentations

A

Increased breathing effort and harsh lung sounds
Lameness
Eye discharge
Diarrhea
Fever, up to to 40 degrees Celsius (104.0 degrees Fahrenheit)
Pale gums and moist body tissues (mucous membrane)

42
Q

Histoplasmosis

Laboratory Diagnosis

A

Numerous Yeast Forms of H. capsula-tum in Alveolar Macrophages

Bacteriology I Final Review (12 decks)

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