Answer to Question 4


Question 4.
A. A saturated salt flotation was done on a fecal sample from a 4 month old Puppy which has been brought to you for its first check-up. The results of this test are shown under the microscope at Station #4. Identify the parasite egg (give Genus and species). (7 pts.)



Toxocara (5 pts.) canis (2pts.)


B. What other similar looking egg may be found the feces of a dog and how could you tell it apart from the egg you identified in part A? (3 pts.)



A similar egg is Toxascaris leonina (1 pt.). T. canis has a rough shell, and the center mass takes up most of the egg, which is round. T. leonina, in contrast, has a smooth shell, is oval, and there is more space around the central mass (2pts.).

 

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Faculty: Dr. Colin Johnstone
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Updated 9/29/00