Colleen Almgren, DVM, PhD, DABT, DABVT

Veterinary Toxicologist

Dr. Colleen Almgren joined Pet Poison Helpline® (PPH) and SafetyCall International (SCI) in 2011. She received her BS in Biology (1982) and her Doctor of Veterinary Medicine (1987) from the University of Illinois. In 2005, she completed both a residency in anatomic pathology and PhD at the Ohio State University. She has many years experience in small, large and laboratory animal medicine and has worked in both private practice and institutional/educational facilities (including Northwestern Memorial Medical Center & the Veterans Administration in Chicago; Pathology Associates Inc.; and the State of Ohio, Department of Agriculture, Animal Disease Diagnostic Laboratory). Her strong interest in toxicology and mechanisms of disease led her to accept a position at another animal poison control center where she was employed as a consulting veterinarian in Clinical Toxicology from 2007-2011. Dr. Almgren has published several peer-reviewed, scientific, veterinary publications. Dr. Almgren is a Diplomate of The American Board of Toxicology (ABT) and the American Board of Veterinary Toxicology (ABVT). She currently resides in Eagan, MN.



Almgren CM, Lee JA. Serotonin Syndrome. Consultant on Call/Toxicology, Clinician’s Brief 2013; 11(10):11-16.

DePalatis L, Almgren CM, Patmastan J, et al. Structure and function of a new class of human prolactin antagonists. Protein Expr Purif. 2009;66(2):121-30.

Almgren CM, McClure DE. Granulomatous pneumonia in the opossum (Didelphis virginiana) associated with an intracellular fungal agent. Comp Med. 2000;50(3):323-8.

Almgren CM, Olson LE. Moderate hypoxia increases heat shock protein 90 expression in excised rat aorta. J Vasc Res 1999;36(5):363-71.

Book Chapters

Almgren CM. Diquat and Paraquat in Blackwell’s Five Minute Veterinary Consult – Small Animal Toxicology. Wiley-Blackwell, Ames IA.  (2016), 552-559

Almgren, CM. Herbal Toxicities Appendix in Blackwell’s Five Minute Veterinary Consult – Canine and Feline, 6th ed.  Wiley-Blackwell, Ames IA.  (2016), 1433-1434

Almgren, CM.  Anticoagulant Rodenticides. In: Murphy, L ed. Large Animal Toxicology. Wiley-Blackwell, Ames IA. (pending)

Almgren CM. Welch SL. Toxin Exposures in Small Animals. In: Bonagura JD, Twedt DC, eds. Kirk’s Current Veterinary Therapy XV. 15th ed. St. Louis, MO: Saunders Elsevier, 2014

Almgren CM. Welch SL. Toxin Exposures in Small Animals; Kirk’s Current Veterinary Therapy XV. St. Louis, MO: Elsevier; 2012