The Louisiana Animal Disease Diagnostic Lab is a full-service AAVLD-accredited laboratory. Housed in the LSU School of Veterinary Medicine, LADDL services the people of Louisiana and surrounding states by providing animal disease diagnostic services to agricultural and general communities. LADDL enhances research development and adaptation of diagnostic tests and protocols, researches and investigates livestock and companion animal diseases impacting the health and wellbeing of the animals and citizens of Louisiana, and researches selective diseases impacting the economics on the animal industries of Louisiana. 
LADDL operates in partnership with Louisiana State University, the LSU School of Veterinary Medicine, Louisiana veterinarians, and livestock and poultry producers. LADDL also provide support for the teaching and research programs of the LSU SVM. 


Louisiana Animal Disease Diagnostic Laboratory (LADDL) is working with veterinarians and the Louisiana Department of Health to test dogs and cats for COVID-19 through December 31, 2021. This collaborative effort is being funded by the CDC. Please click the link below for details. 

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Submission policies for bacteriology specimens, clinical pathology, equine piroplasmosis, histopathology, molecular diagnostics, rabies testing, serology, toxicology, and tritrichomonas are available in the top navigation bar under Policies & Guidelines. Forms and fees are also available in the top navigation.


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We are excited for LADDL’s Drs. Come Thieulent, Mariano Carossino and Director Udeni B.R. Balasuriya for their contributions to the recently published article: “Development of a TaqMan® allelic discrimination PCR assay for rapid detection of equine CXCL16 allelic variants associated with the establishment of long-term equine arteritis virus carrier state in stallions.” This project began over 10 years ago in Dr. Balasuriya’s lab. Drs. Carossino and Thieulent completed the work here at LADDL. Congratulations to all!

View the online publication

LADDL confirms first case of CWD in Louisiana

New fees went into effect July 1, 2021.

Learn more about our Free Courier Service in the Baton Rouge and New Orleans areas.

We offer GlobalVetLINK for electronic submission and certificates for EIA (Coggins) testing.  They offer a 60 day free trial: see



River Road, Room 1043

Baton Rouge, LA 70803

Administration: 225-578-9777

Sample Receiving and Accessions: 225-578-9778

After hours emergency:

859-806-4775 or 225-892-6461 


Directions to LADDL

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