Gates is co-author, with Chuck Collins, of the book Wealth and Our Commonwealth: Why America Should Tax Accumulated Fortunes, a defense of the policies promoted by the estate tax. He married Mary Maxwell Gates, whom he met at UW, and who died in 1994. They had three children: Kristianne, Bill, and Libby.
Symptoms of heartworm disease may include loss of appetite, lethargy, exercise intolerance, weight loss, fever, dyspnea (difficult, labored breathing, shortness of breath), coughing, weakness, dull dry coat, and hemorrhage. There are no symptoms at all until the disease is advanced.
A heartworm test for dogs is helpful in detection of the parasites known as dirofilaria immitis, commonly referred to as heartworm. This parasite is detected in the bloodstream of dogs and is known to cause symptoms such as weight loss, appetite loss, coughing, breathing difficulties and heart disease.