Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
VET 140 Week 7
Mycology
| Question | Answer |
|---|---|
| Heterotrophs | Non-photosythetic |
| All fungus are multicellular except _____. | Yeast |
| Saprophyes | Live off of dead/decaying things |
| Chitin | A hard substance found in things such as insect exoskeletons |
| Exoenzymes | Damage host cells |
| Mycelium | A branching web made of hyphae |
| What are the two main morphological forms of fungus? | Molds and Unicellular yeasts |
| _____ occur in both mold and yeast forms depending on environmental factors. | Dimorphic fungi |
| Anthropophilic | Confined to human beings |
| Zoophilic | Parasites of animals |
| Geophilic | Exist as free-living saprophytes in soil |
| Molds have ____ and _____ while yeast does not. | Hyphae; spores |
| Yeast only uses _______ reproduction via ______. | asexual; budding |
| Arthroconidia/Arthrospores | Formed and released during the process of hyphal fragmentation |
| Blastoconidia/Blastospores | Conidia which are produced by budding from a mother cell, from hyphae or from pseudohyphae. |
| Chlamydoconidia/Chlamydospores | Thick-walled, resistant spores which contain storage products |
| Macroconidia | Large multi-celled conidia which are produced by dermatophytes in culture |
| Microconidia | Small conidia which are produced by certain dermatophytes |
| Phialocondia | Conidia produced from phialides |
| Sporangiospores | Spores formed by zygomycetes which are released when a mature sporangium ruptures. |
| Sexual spore production is also called _______ while asexual is called __________. | Conidia; Sporangiospores |
| Sexual spores | Fusion of protoplasm and nuclei of two cells by meiosis |
| Asexual spores | For molds |
| Fungi can be differentiated by the structure of their _____ and the types of _____ | Hyphae; spores |
| Most fungal invasions of tissue result from _______, ________, and _______. | Inhalation, wound contamination, contact with infected tissue |
| Dermatophyte diseases are associated with _______, _______, and _____. | Immunosuppression, age, debilitation |
| Cats get the most infections from the form ______. | Microsporum canis |
| Miliary | Multiple tiny lesions |
| The most commonly isolated dermatophyte in both cats and dogs is Microsporum _____. | canis |
| T. verrucosum affects cattle and is most common in _____. | Winter |
| Horses get _______ from direct contact or fomite exposure. | T. equinum |
| Around ____ of Wood's Lamp tests used for Dermatophyte testing give false negatives. | 50% |
| When testing for dermatophytes with a KOH test the ____ and ____ will dissolve but not the ____. | skin, hair; hyphae |
| Colonies of Aspergillus species grown on ____ agar are often velvety, fluffy, green, black, yellowish, | Saboraud |
| ______ is the most common fungal infection in humans. | Aspergillus |
| Aspergillus causes ______ in horses. | Guttural pouch mycosis |
| Cats only contract Aspergillus if they are _______. | immunosuppressed |
| Immunosuppression or factors such as _______________ disturbs resident flora on mucosal surfaces may facilitate yeast overgrowth leading to tissue invasion. | antimicrobial therapy |
| Commensals on skin and mucous membranes | Yeast |
| Candida albicans | This causes mycotic stomatitis in pups, kittens, and foals |
| Cryptococcosis | This is caused by inhalation of yeast cells in contaminated dust, like to grow in pigeon droppings and is the most common systemic mycosis in cats. |
| Malassezia pachydermatis | Opportunistic skin commensals on birds and mammals particularly in areas that are rich in sebaceous gland. Causes Otitis externa and seborrheic dermatitis in dogs. |
| Environmental and cultured at 25 degrees Celsius, stable form of dimorphic fungi. | Mold form |
| In animal tissues and cultured at 37 degrees Celsius on brain-heart infusion agar | Yeast form |
| _______ infects dogs and humans through aerosol exposure to fungus after changing water levels. | Blastomycosis |
| Histoplasma capsulatum | Found in Mississippi and Ohio River valleys, likes soil enriched with bat/bird feces |
| Coccidioides immitis | Affects mostly young male dogs but can affect many species, found in arid regions of southwestern USA, also called "Valley Fever" |
| Sporotrichosis | Zoonotic, widely distributed in the environment, grows on dead vegetation, occurs sporadically in horses, cats, dogs, and humans. |
| Zygomycetes | Saprophytes in the environment, uncommon in healthy immuno-competent animals |
| Mycotoxin | A poisonous substance produced by a fungus. |
| Diseases are non-contagious, sporadic, seasonal and tend to be associated with certain batches of feed. | Mycotoxin diseases |
| Aspergillus flavus | Absorption from gastrointestinal tract, metabolized in liver into toxic products |
| Ergotism | Caused by Claviceps purpurea, found in ryegrasses, rye and other cereals, causes gangrene |
| Tremorgen intoxications | Also known as "Ryegrass Staggers" |
| Mycotoxic oestrogenism | The toxic product is a non-steroidal estrogen; associated with fusarium graminearum |
Created by:
Acraft02
Popular Veterinary sets