Shih Tzu — Prekallikrein deficiency (hereditary; OMIA-verified breed predisposition)
Source: first-hand OMIA (University of Sydney) breed-specific hereditary-disorder record, saved verbatim to source_file; every claim below is a C1 byte-substring of it.
Claims
Breed: Shih Tzu (Dog)Disorder:Mode of inheritance: Autosomal recessive- `Clin feat: Prekallikrein (PK) is a protein that is involved in the blood clotting process. As a result, dogs with a PK deficiency experience prolonged activated partial thromboplastin Time (aPPT) (Okawa et al., 2011). This disorder is often asymptomatic in the absence of other clotting factor deficiencies (Chin et al., 1986). Classical signs of haemostatic disorders such as haematuria and prolonged bleeding or healing times after surgery have been reported but are unlikely unless there is concurrent disease (Chinn et al. 1986). Gastrointestinal bleeding has also been reported in a dog with this disorder (Otto et al., 1991).