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Photo courtesy of: Patrick Ma, M.D. Used with permission. Not to be reproduced.

A 7-year-old boy presents with decreased vision in the left eye over the past few weeks. On examination you see a posterior pole granuloma, and a dense vitritis in the left eye and a normal fundus examination of the right eye.  He was recently given a puppy and plays frequently with the dog outside.  You suspect Toxocariasis.

Which diagnostic tests should you first order and perform?

a. ELISA for T. canis and eosinophil count b. chest X-ray and urine analysis c. blood and sputum cultures d.  diagnostic vitrectomy

For answers to the above, click here on or after February 7, 2006.