Veterinary Medicine - February 2008 - (Page 86) ClinQuiz quick Q&As to boost your expertise Parasitology Test your knowledge of veterinary parasitology with this short quiz. But don’t worry, unlike the examinations you took in school, the answers, with complete explanations, are provided. Susan E. Little, DVM, PhD, DEVPC 1) roundworm, Baylisascaris procyonis, have been increasingly identified in domestic dogs. These infections are of particular concern because: Baylisascaris procyonis is an unusually large ascarid, so infections often result in intestinal impactions, particularly in small-breed dogs. When people, particularly children, ingest larvated B. procyonis eggs, the larvae may migrate extensively and induce severe neurologic disease. Adults of B. procyonis commonly migrate aberrantly in the lungs of the atypical canine host, resulting in severe respiratory disease. Infections with the raccoon 2) A 12-week-old puppy is presented with a three-week history of intermittent mucoid diarrhea. The puppy has been treated with sulfadimethoxine for the last two weeks, but the diarrhea Figure 1 400X persists. Fecal flotation by centrifugation reveals these parasites (Figure 1). What is the most effective treatment protocol? 50 mg/kg fenbendazole orally every 24 hours for five days 25 mg/kg albendazole orally every 12 hours for two days 30 mg/kg metronidazole orally every 12 hours for five days microfi µm 3) Numerous 310 µmlariae, each about 6onora7bloodwide and about long, were found smear from a 2-month-old puppy from Alabama. The puppy’s heartworm antigen test result was negative, and heartworm preventive therapy had not yet been started. How did this puppy most likely acquire this parasite? Mosquito bite Flea bite Transplacentally beagle because of a progres4) A 5-year-old spayed female sore onisitspresentednasale. Treatment with a sively enlarging, nonhealing planum topical antibiotic ointment had not been effective. These organisms are found on a Giemsa-stained impression smear of the affected tissue (Figure 2). The history reveals that this dog traveled extensively in Italy and Spain several months ago. How did this dog most likely become infected with this parasite? By inhaling infective cysts from the environment From the bite of an infective sandfly Through direct contact with an infected person 5) A 9-year-old boy developed severe pruritus associated with erythematous and tortuous tracks on his feet, the back of his thighs, and both hands. The boy’s pediatrician referred him to a dermatologist, who diagnosed cutaneous larva migrans and identified the pet dog, a 2-year-old bichon frise, as a potential source of the parasite. Diagnostic tests, treatment, and a review of the preventive program for what parasite, a causative agent of cutaneous larva migrans, are indicated in this dog? Ancylostoma caninum Toxocara canis Trichuris vulpis Figure 2 1,000X 86 February 2008 VETERINARY MEDICINE
For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.