Parasites Flashcards
Filamentous, present in mouth, and colonies have a molar-tooth appearance on agar.
Actinomyces
Actinomyces may occur as acute ___ infection
pyogenic
Actinomyces may occur more commonly as a ___ infection that is both ___ and ___.
chronic infection that is both suppurative and granulomatous
Actinomyces is characterized by multiple __ and interconnecting ___ ___.
abscesses and sinus tracts
Bacteria that has macroscopic masses known as sulfur granules due to their yellow/orange appearance = ?
Actinomyces
Chronic suppuration results in ___ formation and a fibrotic “walling off” of the lesion.
granuloma
Strictly aerobic, gram (+) rod that is in soil
Nocardia
Between Actinomyces and Nocardia, which is seen in the oral cavity?
Actinomyces
Between Actinomyces and Nocardia, which is seen in the environment?
Nocardia
Between Actinomyces and Nocardia, which is strictly anaerobic?
Actinomyces
Between Actinomyces and Nocardia, which is strictly aerobic?
Nocardia
What is the treatment for Actinomycosis?
Penicillin G
What is the treatment for Nocardia?
Sulfonamides
Gram (+) branching filaments, sulfur granules in pus are characteristics of?
Actinomyces
Gram (+) filaments, often acid-fast (like TB) are characteristics of?
Nocardia
What are the two kinds of vectors?
Mechanical and Biological
Major malaria parasite?
Sporozoa (doesn’t move; non-motile)
Worldwide incidence of malaria?
1 million children each year, each child dying every 30 seconds
What is the major plasmodium species in malaria?
P. falciparum
Pathology of malaria?
death due to RBC destruction (anemia), clots in brain and other organs (spleen and liver)
(most critical symptom - death within 3-4 days if not treated)
