Eukaryotic Microbes Flashcards
Fungi
- Nonphotosynthetic
- Cell wall made up of CHITIN
Mycorrhize
-increases surface area for absorption of water and minerals
Yeasts
-single cells
Molds
-Filamentous
Hyphae/Septate/Aseptate
-Septa prevent movement of nuclei and other large structures on molds
Dimorphic
-2 forms (yeast/mold) depending on temp
Conidia
-Spores free on the ends/tips of fungi
Aspergillus
- Afro spores
- Asexual spores
Penicilluim
- Finger like spores
- Asexual spores
Sporangia
- Enclosed/Capsuled spores
- Asexual spores
Zygospores
- Fusion of nuclei from opposite mating types
- Sexual spores
Fungi life environment
- Grow at a pH 5
- Resistant to low water environment
- Grows at a high sugar/salt concentrations
- Heterotrophic metabolism: requires organic carbon source
Dermatomycoses
- Cutaneous infections
- Like keratin rich areas
Tinea
-Ringworm
Tinea Corporis
-Ringworm on the body
Tinea Capitis
-Ringworm on the head
Tinea Pedis
-Ringworm on the foot
Systemic Mycoses
-Inhale arthorospores
Arthospores
- Very primitive spore type, formed by the breaking up or disarticulation of fungal mycelia
- Treatment: amphotericin B
Coccidioidomycosis
- Coccidioidesimmitis
- “Valley Fever”
- Found: Dry alkaline soils
- Contracted by inhaling arhrospores
- Lung infection
- Treatment: amphotericin B
Hispoplasmosis
- Ennonsiella (Histoplasma) capsulata
- “Darling’s Disease
- Found: Rich, moist soils
- Inhaling spores
- Treatment: amphotericin B
Blastomycosis
- Cryptococccusneoformans
- Found: Bird droppings
- Opportunistic
- Causes meningitis
Candidiasis
- Candida albicans
- Human flora
- Opportunistic
Protists
- Unicellular
- Nonphotosyntghesizing
- Wall-less
Reproduction of a protists
- Fission: asexual mitosis
- Schizogony: multiple nuclei and fragmentation
- Sexual: gamatocytes
Transmission of protists to humans
- Ingestion
- Arthropod vector
Life Cycle of a protists
- Trophozite
- Cyst
- Definitive host
- Intermediate host
Trophozite stage
- Active
- Adult feeding
Cyst
- Resting state or resistant form
- NOT A REPRODUCTIVE STRUCTURE
Definitive host
-Houses sexual stage
Intermediate host
-All asexual stages
Amoebae
-Move and inquire food through pseudopods (extensions of the cytoplasm)
Flagellates
-Blood parasites transmitted by biting insects
Apicomplexa
-Nonmotile, obligate intracellular parasites and pathogens of animals
Plasmodium
- Causes: Malaria
- Transmitted: Mosquito bite
- Symptoms: Fever and chills
Giardia
Giardia lamblia
-Causes: Giardiasis
-Transmitted: *cyst are transmitted Oral-fecal route
* trophozites form in small intes. after
ingestion of cyst
-Symptoms: Diarrhea
-2 forms: trophozoites (feeding form) and cyst (dormant)
Trichomonas vaginalis
- Causes: trichomoniasis
- Transmitted: Sexual contact
- Symptoms: Profuse vaginal discharge
Tryponasomes
Trypanosoma cruzii
- Causes: Chagas disease (South American sleeping sickness)
- Transmitted: Kissing bug feces,
- Symptoms: Anemia, lethargy, heart & brain damage
- Parasite outside the RBC
Tryponasomes
Trypanosoma brucei
- Causes: African sleeping sickness
- Transmitted: Tse Tse Fly
- Symptoms: Anemia, lethargy, heart & brain damage
- Parasite outside the RBC
Entamoeba hystolyctica
- Causes: Amoebic dysentery
- Transmitted: Food/water contaminated with human waste in form of cyst
- Symptoms: Severe diarrhea, bloody stools
- Cyst & trophozoites
Helminths
- Multicellular
- Parasites
The two types of phyla
- Platyhelminths: flatworms
2. Nematodes: roundworms
The two types of helminths
- Platyhelminths
2. Ne
