All Breeds
CYB5R3
Cardiovascular System
Swab, Blood EDTA, Blood Heparin, Semen, Tissue
Autosomal Recessive
10
2017
Methaemoglobinaemia is a disorder caused by an excess of methaemoglobin in the blood, which can cause lethargy, shallow breathing and increased heart rate. This variant, observed in a mixed-breed dog, is caused by a recessive mutation to the CYB5R3 gene. Another variant has been discovered in the Pomeranian.
Observed symptoms include coughing, shortness of breath, exercise intolerance, increased heart rate and cyanosis (blue coloration) of the membranes of the mouth and genitals. Affected dogs may also respond aggressively when touched on the head or neck. Increased methaemoglobin levels can be confirmed via blood analysis.
Pubmed ID: 28963729
Omia ID: 2131
