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Dr. Guillermo Couto

Dr. Guillermo Couto is a diplomate of the American College of Veterinary Internal Medicine in the specialties of Small Animal Internal Medicine and Oncology. He has coauthored the best-selling Small Animal Internal Medicine textbook, now on its sixth Edition, and has published over 175 scientific articles in peer-reviewed journals, and over 220 book chapters. He has almost 50 years of experience in clinical and comparative hematology, oncology, and clinical pathology, and is an expert in Greyhound and sighthound medicine. He has published over 40 peer-reviewed scientific articles on Greyhound, Galgo, and sighthound medicine.

Recent Articles

Bleeding and Clotting Issues in Greyhounds: Dos and Don’ts

Dr. Guillermo Couto
April 24, 2024

With the increasing popularity of retired racing Greyhounds and other sighthounds as pets, veterinarians are likely to evaluate dogs of...

Are Greyhounds Really Dogs?

Dr. Guillermo Couto
April 23, 2024

The dog was likely domesticated between 15,000 and as many as 30,000years ago. Due to both natural and human selection,...

Retrospective analysis of canine fecal flotation and coproantigen immunoassay hookworm positive results in Greyhounds and other dog breeds

Dr. Guillermo Couto
April 17, 2024

Haematological and biochemical values in North American Scottish deerhounds

Dr. Guillermo Couto
May 13, 2023

Sighthounds, including deerhounds, have unique physiological traits that result in laboratory test results that may lie outside reference intervals for...

Serum Symmetric Dimethylarginine Concentration in Greyhound Pups and Adults

Dr. Guillermo Couto
July 8, 2021

Greyhounds have developed numerous physiologic and hematologic adaptations specific to the breed. Adult Greyhounds have significantly higher serum creatinine (sCr)...

Outcome and treatments of dogs with aortic thrombosis:100 cases (1997-2014)

Dr. Guillermo Couto
July 30, 2020

Hyperkalemia during general anesthesia in two Greyhounds

Dr. Guillermo Couto
June 1, 2019

A 36-kg (79-lb) castrated male Greyhound (dog 1) and a 25-kg (55 lb) spayed female Greyhound (dog 2) underwent general...

Risk-modeling of dog osteosarcoma genome scans shows individuals with Mendelian-level polygenic risk are common

Dr. Guillermo Couto
March 19, 2019

Abstract Background Despite the tremendous therapeutic advances that have stemmed from somatic oncogenetics, survival of some cancers has not improved...

SETD2 Is Recurrently Mutated in Whole-Exome Sequenced Canine Osteosarcoma

Dr. Guillermo Couto
July 1, 2018

Abstract Osteosarcoma is a debilitating bone cancer that affects humans, especially children and adolescents. A homologous form of osteosarcoma spontaneously...

The Renin-Angiotensin-Aldosterone System in Greyhounds and Non-Greyhound Dogs

Dr. Guillermo Couto
May 9, 2017

The renin-angiotensin-aldosterone system (RAAS) regulates blood pressure, electrolyte homeostasis, and renal function. Blood pressure, serum sodium concentrations, and urinary albumin...

Comparative genomics of canine hemoglobin genes reveals primacy of beta subunit delta in adult carnivores

Dr. Guillermo Couto
February 8, 2017

Background The main function of hemoglobin (Hb) is to transport oxygen in the circulation. It is among the most highly...

Hyperhomocysteinemia in Greyhounds and its Association with Hypofolatemia and Other Clinicopathologic Variables

Dr. Guillermo Couto
November 19, 2016

Background Folate and cobalamin are essential cofactors for homocysteine (HCY) metabolism. Hyperhomocysteinemia, a multifactorial condition, may reflect B vitamin deficiency...