NAVLE question with complete solution 2023 updated

NAVLE question with complete solution 2023 updatedE - 30-90% of adults in colonies are asymptomatic carriers - correct answer *Which of these statements about Pasteurella’s in rabbits is most accurate?* A - 2-week course of antimicrobials is effective in eliminating disease B - It is a gram-positive, nonmotile coccobacillus C - Every positive test result indicates a pathologic condition D - Most common presentation is chronic, insidious arthritis E - 30-90% of adults in colonies are asymptomatic carriers A - Treat all calves for lice - correct answer *In January you examine a group of dairy calves which range in age from 2 to 7 months, with a complaint of hair loss and pruritus. The calves are thin and mucous membranes are pale. One has developed bronchopneumonia, and is also febrile and depressed. You do a skin scraping and find the parasite shown in the image, which your technician identifies as Hematopinus sp. The CBC shows the calves to be severely anemic. What treatment recommendation should you now make to the dairy owner?* A - Treat all calves for lice B - Treat all calves with long acting tetracycline C - Treat all calves with hematinics D - Vaccinate all calves against Mannheimia hemolytica E - Treat all calves for mange C - Inguinal hernia - correct answer *A seven-week-old pot-bellied pig is presented with a posterior swelling that looks like this:* *Which one of the following is the most likely clinical diagnosis?* A - Perineal hernia B - Testicular torsion C - Inguinal hernia D - Cryptorchidism E - Intersex syndrome E - Sulfadimethoxine (Albon) - correct answer *An 8-week old Abyssinian cat recently obtained from a cattery presents to you for an examination and the owner reports that the cat has had diarrhea. On fecal float, you find multiple structures like the one shown in the photo (see image). What should you treat the cat with?* A - Praziquantel (Droncit) B - Metronidazole (Flagyl) C - Pyrantel (Strongid) D - Selamectin (Revolution) E - Sulfadimethoxine (Albon) F - Amoxicillin and clavulanate (Clavamox) B - 85% - correct answer *A 10-year old female spayed Siamese cat presents for a new lump the owner found a month ago. She was spayed last year before she was adopted from the shelter. The owner states that the lump has grown over the last month, and it doesn't seem to bother the cat. On exam, the 2 cm lump is located on the left 2nd mammary gland, and no other lumps are noted. The lump is freely moveable, and chest radiographs are clear. What is the chance that this tumor is malignant?* A - 20% B - 85% C - 50% D - 5% D - Hypothyroidism - correct answer *An obese 7-year-old Labrador Retriever is presented for annual vaccinations. The owners claim that they have restricted his diet and try to exercise him but he still keeps the weight on. There is alopecia on the dorsum of his tail and he has an unusual worried facial expression.* *Which one of the following choices is the most likely diagnosis?* A - Hyperadrenocorticism B - Male pattern alopecia C - Sarcoptic mange D - Hypothyroidism E - Hypoadrenocorticism *B - Retrobulbar abscess* Acute, painful exophthalmos is usually due to retrobulbar abscessation. These lesions are usually painful and may be swollen. These animals are frequently systemically ill with fever and leukocytosis. Causes of retrobulbar abscesses include penetrating wounds, foreign bodies, spread from dental or sinus infection, and hematogenous spread. Glaucoma does not cause exophthalmos, although, chronically it can cause buphthalmos which may appear similar. Anterior uveitis also does not cause exophthalmos. - correct answer *A 6-year old intact male domestic short haired cat presents with acute onset exophthalmos of the right eye in the past 2 days. He is painful on palpation around his eye and head. The eye can be retropulsed some, but there is resistance present. He has not been eating in the past day and has a rectal temperature of 103.4F (39.7 C). What is the most likely diagnosis?* A - Anterior uveitis B - Retrobulbar abscess C - Glaucoma D - Orbital neoplasia A - Cochliomyia hominivorax - correct answer *What organism is depicted in the images below?* A - Cochliomyia hominivorax B - Dermatobia hominis C - Onchocerca cervicalis D - Cuterebra spp. E - Coenurus cerebralis D - Moraxella bovis - correct answer *This is a corneal abscess secondary to infectious keratoconjunctivitis (pinkeye). What is the most commonly recognized organism that causes pinkeye in cows?* A - Colesiota conjunctivae B - Chlamydophila pecorum C - Mycoplasma spp. D - Moraxella bovis E - Neisseria spp. *D - Selenium deficiency* The pale muscle and clinical signs are classic for vitamin E and selenium deficiency. This is important to remember! Other things that should be on your differential list for this case include cardiotoxic plants. - correct answer *You are working with a farmer who is having trouble with calves between the age of 2 weeks and 6 months. They are alert, but weak, dyspneic and die suddenly. On necropsy they have pale cardiac and skeletal muscles. What is the farmer's problem?* A - Sorghum toxicity B - Lightning strike C - Copper deficiency D - Selenium deficiency *C - Coelom* This bird has a coelomic mass. - correct answer *A long eared owl with a history of wing amputation is presented with anorexia, lethargy, and ataxia. Based on the images shown below, which one of the following structures has pathology?* A - Cloaca B - Gizzard C - Coelom D - Ventriculus E - Proventriculus *A - Shedding of virus via saliva*