Exam 5: Topic 25 Flashcards
Describe the basic body plan of a fungus. Name the major tissue type that is the site of infection for mycoses.
• Fungal cells tend to aggregate together into hypha. Hypha collect into mycelium.
• Hypha protrude upward into a fruting body in order to disperse their spores.
• Fungi infect skin and mucous membranes.
What organ system are parasitic fungi most commonly associated with?
• Skin and mucous membranes.
What organs or tissues harbors Candida albicans?
• Local: vagina, mouth, GI tract.
• Systemic: blood
Which of the following best characterizes Candida and why? Obligate parasite, aggressive opportunist, mild opportunist, commensal.
Is the consummate opportunistic pathogen thay can infect mucous membranes and the blood
. Briefly describe the disease manifestation when Candida colonizes the vaginal tract
and oral cavity/esophagus.
• Vagina: yeast clumps around cervix.
• Oral cavity: Oral thrush.
Describe forces that help prevent Candida overgrowth.
• Obergrowth is prevented by competing microflora.
Hormones: pregnant woman
- What groups (or risk factors) predispose someone to colonization of Candida in the
oral cavity and vaginal tract
Frequency of candida spores landing on esophagus–tissue macrophage phagocytosis
Candida sepsis mimics what type of sepsis?
• Bacterial sepsis. Clinical and laboratory signs are often similar.
Can Candida infections be controlled by antibiotics? Why or why not?
No, they can actually increase the risk. Antibiotics are used to treat bacteria, not fungus like candida
What is Tinea? Name two diseases associated with Tinea.
• Tinea corporis: causes ring-like lesions that scale over time.
• Tinea pedis: foot ringworm/athletes foot.
• Tinea cruris: groin ringworm.
• Tinea ungulum: ringworm of the nails
Describe the role of moisture and clothing in Tinea transmission.
• Example: athletes foot from public showers. Spores stay alive in standing water and when someone walks across water to shower, they pick up spores and infection spreads.
