Ohio ADDL August 2020 Newsletter


Ohio Department of Agriculture   -   August 2020

In This Issue

- New test fees

- Shipping during the dog days of summer

- Lead toxicosis in a calf

- Discontinuation of aquaculture virus isolation

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Animal Disease Diagnostic Laboratory

8995 East Main Street Building #6

Reynoldsburg, OH 43068

Phone: (614) 728-6220

Fax: (614 ) 728-6310



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New Test Fees Go Into Effect August 1, 2020

ODA’s lab fees have remained the same for years. The need to increase these fees has become evident for a number of reasons, including the increased cost of reagents. With these proposed fee adjustments, our testing fees will now be on par with the average cost of tests in other states. 


We value you as a customer and hope you understand the necessity to make these changes. Attached you will find the new lab fees. These changes go into effect August 1, 2020.


Shipping During Hot Weather Months

Rose Blocker, RVT, Central Receiving 

The ‘dog days of summer’ are here! While the sunshine is perfect for lounging by the pool or firing up the grill for a backyard barbecue, the prolonged heat is not so great for some of our more temperature-sensitive samples. Before shipping samples to the laboratory, don’t forget to check the weather! Here are a few things to consider while packing up your samples this summer:

• It’s hot in those trucks! Add an extra ice pack or two for temperature-sensitive samples and ensure that they are packed close enough to the samples to keep them cold.

• Some occasional shipping delays have been observed due to COVID-19. Pack samples in insulated Styrofoam boxes with a cardboard outer box to keep samples safe and cool for longer in case your samples are delayed.

• Melting ice packs sweat – a lot! Be sure to include absorbent material in your packaging and protect submission forms inside a sealed plastic bag.

If you have any questions about shipping your samples, please call the Animal Disease Diagnostic Laboratory at 614-728-6220 and visit our Submission Information webpage for more information.

Lead Toxicosis in a 6 Months Old Heifer Calf 

Dr. Craig Sarver, DVM, MS, ADDL Pathologist

Dr. Diane Gerken, DVM, PhD, Diplomate, American Board of Veterinary Toxicology, Emeritus Professor, The Ohio State University College of Veterinary Medicine

The fresh brain of a 6 months old Angus heifer was submitted to Ohio Department of Agriculture’s ADDL. This calf exhibited the acute clinical signs of walking backwards and tremors which proceeded to recumbency and death within 2-4 hours. Portions of the brain were submitted to the Ohio Department of Health for rabies examination. Rabies testing was negative and further diagnostic testing revealed a mild eosinophilic meningoencephalitis on histopathology suggesting salt toxicity (sodium ion toxicosis – water deprivation) and/or parasitic infection. Fresh brain was submitted for the chemical analyses of sodium and lead. The brain sodium concentration was somewhat elevated (1800 ppm wet weight), but not sufficiently high to support sodium ion toxicosis - water deprivation (concentrations of 2000 ppm or greater are diagnostic). The lead concentration in the brain of this animal was reported to be 0.89 ppm wet weight. Brain lead concentrations of 0.7-1.4 ppm have been reported to be indicative of toxicity in the literature. Among the many sources for lead exposure in cattle have been automotive batteries, lead-based paint, old agricultural pesticides (lead arsenate) and construction materials. A thorough search for the source of lead is necessary to prevent further exposure of additional animals – in this case, the source was batteries within the enclosure of the grazing area and one other calf likely died from the exposure before the source was found.

Test Updates

Discontinuation of Aquaculture Virus Isolation Services

Effective August 1, 2020, the ADDL no longer offers aquaculture virus isolation services. We will continue to offer PCR-based detection methods for viral hemorrhagic septicemia virus (VHSV) and  infectious salmon anemia virus (ISAV).