Other

Question 1

Rhinosporidium

Answer 1

7-15 um diameter, mature brightly eosinophilic endospores with a 1-2 um bilamellar cell wall and containing multiple 2 um round internal esosinophilic globules. Can also see large (100-450 um) sporangia filled with immature endospores.

Question 2

Pneumocystis

Answer 2

5-10 um poorly staining to clear, spherical cysts containing 4-8 crescent shaped intracystic bodies each containing a single small, central, basophlic round to oval nucleus. (techinically classified as fungal)

Question 3

Conchiformibius (Simonsiella)

Answer 3

25-75 um bilobed oval to footprint shaped structures composed of 50+ thin, deeply basophlic rods arranged in parallel across the short axis of the aggregate

Question 4

Mycobacterium

Answer 4

short, negatively staining rods (1-3 um)

Question 5

Filamentous rods (Actinomyces, Nocardia)

Answer 5

long, slender, variably staining strands with intermittent pink to purple areas causing a beaded appearance. Often found in matted aggregates.

Question 6

Rhodococcus

Answer 6

variably shaped including cocci, cocobacilli, and short rod forms