NAVLE Practice Questions 2023 with 100% correct answers

A male gerbil is presented with a distinct oval area of alopecia on the mid-ventral abdomen. The animal has been observed rubbing this area on objects around its terrarium. What is the most appropriate interpretation? A - Normal, do nothing B - Common site of mammary gland adenocarcinoma, biopsy can confirm C - Sarcoptic mange, do a skin scrape D - Trichophyton mentagrophytes, do a fungal culture E - Demodex merioni infestation, treat with ivermectin correct answersA - Normal, do nothing This is the normal location of the ventral marking gland (or pad) in gerbils. It is normal and more pronounced in males than females. Gerbils are often seen rubbing this area on things. This rubbing is thought to be a form of territorial marking. Demodex merioni occurs occasionally in older, debilitated gerbils. A 5-month old steer is presented that is unthrifty-looking and failing to gain weight. He appears somewhat lame, has a rough, light-colored hair coat and depigmented hair around his eyes like spectacles. The steer has a watery dark diarrhea full of gassy bubbles. What is the diagnosis? A - Selenium toxicity