Seven genes are involved in dog hair color, and the hair color specific to a species of dog has a complicated control. By insertion of SINE (short interspersed element) to SILV (Pmel17) gene, marble hair color is usually manifested as a phenotype; the color is called merle. But this genetic modification often causes physical abnormalities such as ophthalmologic disorders and difficulty in hearing. There are also cryptic merle dogs we cannot judge by appearance. When puppies are born with such defects, we speculate that the creptic merle gene is due to an unfortunate mating. In this paper, we used funduscopy on a twelve-year-old mixed-breed female dog whose hair color was not merle. As we obtained peculiar findings to those of dogs with SINE insertion to SILV gene, we did a gene sampling and gene screening, which resulted in confirmation of SINE insertion to SILV gene. Therefore, combination of funduscopy and gene screening is considered to be a powerful diagnostic tool in confirming a merle gene, and useful for more desirable mating.
A dog with severe heart failure of patent ductus arteriosus showed regenerative anemia, thrombocytopenia, and splenomegaly with masses in the spleen, and also swellen lymph nodes in the abdominal cavity. After medication had alleviated the heart failure, splenectomy was performed, and the general condition improved temporarily, but on day nine after surgery the dog died of developing anemia, thrombocytopenia, hypoalbuminemia, hepatic insufficiency, and renal failure. Histopathological diagnosis was hemophagocytic histiocytic sarcoma. The cytopenia in this case was thought to have been caused by microangiopathic hemolytic anemia in the tumor tissues and/or hemophagocytosis by tumor cells; the latter was suspected to be a major cause, considering the postoperative course of the disease.
We have treated injured and/or diseased wild animals which were brought in to the Animal Clinical Research Foundation Hospital from the western and central parts of Tottori Prefecture. Among them we studied wild racoon dogs treated during 2000-2009. Many of them happened to be involved in a traffic accident, and were carried to us with bone fractures or injuries, and some of them were also suffering from infection with Sarcoptes scabiei. Since 2003, there were 14 raccoon dogs with sarcoptic mange, and the number of infected animals was highest in late spring and from autumn to winter although the total number of the racoon dogs which were brought to us was highest in March and September. The numerical changes in sarcoptic-mange- infected racoon dogs in a relevant institution in Gifu Prefecture were similar to ours until 2008.
The technique of tibial tuberosity advancement (TTA) is performed worldwide for repair of cranial cruciate ligament rupture (CCLR) in dogs, since it is easy to perform, and is known to have good results after surgery. The technique was to shift the tibial crest forward for the stability of the stifle joint in CCLR. Our clinic started TTA seven years before this method was established worldwide. In our clinic, we have had 106 successes and 3 failures. In two of the unsuccessful cases, the implant had to be removed. As post-surgery complications, there were tibial tuberosity fracture in four cases, one of which was so severe that it needed repeat, damage of part of implant in one case, patella luxation in two cases, and meniscus injury in four cases. In this paper, we listed the details, show how we improved our skills, discuss what we consider the reasons for failure and complications, and how to prevent such complications.
In a female ten-year-old golden retriever with a three-day history of anorexia, vomiting and acholic diarrhea, choledochal obstruction was suggested by various examinations. The dog was hospitalized and treated medically for three days, but the dog's condition was not improved. After computed tomography revealed the presence of gallstones in the neck of the gallbladder, the stones were removed surgically. At the same time, a choledochal stent was placed because there was stenosis due to inflammation at the major duodenal papilla. As jaundice disappeared rapidly, the stent was removed endoscopically 32 days after surgery. The dog was in good condition after the removal of the stent without recurrence of obstructive jaundice. She died from a different disease on postoperative day 1261. This report suggests that short-term placement of choledochal stent may be useful when a biliary outflow tract has been narrowed temporarily and needs expantion.