Mycoses Of Veterinary Importance Flashcards
Thermally monomorphic mold is
Aspergillus
What do aspergillus colonies look like
- white at first
- then yellow, green, brown, or black
- velvety or cottony
Microscopic characteristics of aspergillus
- Septate hyphae and unbranched conidiophore that form a foot cell
- vesicles
What are often seen in culture preps of aspergillus
Chains of round conidia
Where does aspergillus affect K9s and horse?
- K9: nose
- horse: guttural pouch
Main type of aspergillus
A. fumigatus
Aspergillus infections
- by inhalation
- first airway infected (local inflamm. Resp)
- then potentially lethal invasive infection in immunocomp.
Yeast that is normal inhabitant of upper GIT and moist skin folds
Candida
Is candida local or systemic?
Both
A major nosocomial yeast is called
Candida
T or F: Candida can grow in the body as yeasts w/ pseudohyphae
True
Most common candida spp
C. albicans
Emerging spp of candida
C. auris
Candida auris
- drug resistant (multi)
- rapidly spreading, especially in healthcare facilities
- hard to ID
Pythium insidiosum causes what disease
Pythiosis
(Aka: swamp cancer, florida horse leeches, canckers, etc.)
2 forms of pythium insidiosum
- GIT
- Cutaneous
Areas where pythium insidiosum is common
Gulf coast & SE USA
Where do the spores of pythium insidiosum infect?
- lower extremities of exposed skin
- ingested w/ contaminated h2o
What is pythium insidiosum
Granulomatous ulcerative disease of skin and GIT
What zygomycetes cause zygomycosis
- mortierella
- absidia
Mucor
- rhizopus
T or F: Pythium insidiosum is motile
True
Characteristics of zygomycetes
- aseptate hyphae
- grow fast
What specific diseases can zycomycetes cause?
- gastritis in bovines
- mycotic abortion & placentitis in ruminants
- guttural pouch & cervico-uterine infections in horses
Why is the spread of zygomcyosis fatal
- angio-invasion
- thrombosis
