Canine pythiosis--isolation and identification of Pythium insidiosum.

Pythium insidiosum was isolated from the subcutaneous tissue of a 1-year-old tan crossbreed dog and from the intestinal tract of an 18-month-old Samoyed male. Gomori's methenamine silver stain was superior to hematoxylin and eosin in demonstrating the organism in tissue sections. The agent was identified as P.

Eumycotic mycetoma caused by Pseudallescheria boydii in a dog.

Abdominal eumycotic mycetoma caused by Pseudallescheria boydii was diagnosed in a 3-year-old male Siberian Husky. The dog was examined because of weight loss and signs of depression. Initially, pyrexia was the only clinical finding.

Nasal rhinosporidiosis in two dogs.

Nasal rhinosporidiosis was diagnosed in 2 dogs. Cytologic criteria for diagnosis were the presence of 5- to 10-microns endospores and 50- to 1,000-microns sporangia. These findings made it easy to differentiate rhinosporidiosis from the more common nasal mycoses such as cryptococcosis.

Nutritional chloride deficiency in early lactation Holstein cows.

Beginning 1 wk postpartum, weekly changes of feed and water intake, body weight, milk production, and electrolyte concentrations in serum, saliva, urine, milk, and feces were observed for 8 to 11 wk. Three dietary treatments differing in sodium chloride and sodium bicarbonate supplementation but containing equal sodium concentrations were used. Dietary chloride percents were low .

Effects of dietary chloride restriction in lactating dairy cows.

Early-lactation Holstein cows fed a corn silage-based diet low in chloride and supplemented with sodium bicarbonate were observed for clinical, metabolic, and production alterations over the course of 8 to 11 weeks. In 3 of the more severely affected cows, metabolic derangements included a rapidly developing primary hypochloremic, secondary hypokalemic and hyponatremic metabolic alkalosis, and hemoconcentration. Clinical signs included severe hypophagia, weight loss, muscle weakness, hypogalactia, dehydration, constipation, cardiopulmonary depression, and a depraved appetite.