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Welcome to the MSU Veterinary Diagnostic Laboratory

The Michigan State University Veterinary Diagnostic Laboratory (VDL) is a full-service veterinary diagnostic laboratory offering more than 800 tests in 11 service sections. In the more than 30 years since its inception, MSU VDL has become one of the country's premier veterinary diagnostic laboratories, handling more than 220,000 cases involving approximately 1.5 million tests annually.

The MSU Veterinary Diagnostic Laboratory is an invaluable professional resource, making quality, trusted, and comprehensive veterinary diagnostics widely available. Income from the laboratory is reinvested in teaching, research, and outreach for the purpose of protecting human and animal welfare domestically and around the world.

Winter 2018 Newsletter
News Archives

Each issue of Diagnostic News, the MSU VDL quarterly newsletter for clients, offers diagnostic- and disease-related information and articles for practitioners, as well as VDL business tips and updates for clinic staff.

Donít miss an issue! Subscribe today and change your preferences or unsubscribe at any time.

Archives of past newsletters are still available.

Demand for Vitamin D Testing Impacting Reagent Availability
Due to recent recalls of canine pet food, the MSU VDL is seeing an unprecedented increase in demand for 25-OH Vitamin D testing. The VDL is proactively working with our reagent supplier, but is currently experiencing delays in reagent availability which will cause a short-term delay in 25-OH vitamin D testing. We will be providing updates on status as they become available. For samples submitted for ionized calcium and PTH in addition to 25-OH Vitamin D during this shortage, ionized calcium and PTH assays will be performed and results provided. The remaining sample will be held and 25-OH Vitamin D results will be provided when reagents become available. Thank you for your patience and understanding as we work through this reagent shortage.

Excess Levels of Vitamin D in Dog Food
UPDATE, February 1, 2019 - In addition to the dry food recalls described below, Hill's Pet Nutrition has issued a voluntary recall of select canned dog food for excessive Vitamin D.

UPDATE, December 4, 2018 - The FDA has created a centralized Outbreaks and Advisories resource that contains information for pet owners and veterinarians. This will be updated as they have more information. Please see FDA Alerts Pet Owners about Potentially Toxic Levels of Vitamin D in Several Dry Pet Foods for more information and updates.

November 28, 2018 - Throughout the month of November, several brands of dog food have been recalled due to excess levels of Vitamin D. The most recent recall from November 27, 2018 involves three brands.

Dogs consuming elevated levels of Vitamin D can exhibit clinical signs that include loss of appetite, excessive thirst and/or urination, vomiting, drooling, and weight loss. Prolonged exposure and/or very high levels of Vitamin D in dogs can cause more serious health issues such as renal dysfunction.

The MSU VDL's Vitamin D Profile (test code 20035) includes an interpretation of results by a veterinary endocrinologist. When elevated levels of Vitamin D are reported, a potential dietary source should be considered.

Veterinarians who suspect that pet foods are contributing to animal illness should make a report to the Food and Drug Administration (FDA) through their Safety Reporting Portal or by calling their local FDA Consumer Complaint Coordinators. For more information, please see "Information for veterinarians on reporting suspected animal food issues," published in the September 1, 2018 issue of JAVMA.

Pet owners who think their dogs may be ill from eating food with excess levels of Vitamin D should contact their veterinarians.
AAVLD Fully accredited by the
American Association of Veterinary Laboratory Diagnosticians
through December 31, 2022
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