Riboflavin

Sources and Functions

• Riboflavin function:• Riboflavin is needed for energy metabolism,

building tissue, and helps maintain good vision.• Riboflavin sources:• Riboflavin is found in dairy products, lean

meats, poultry, fish, grains, broccoli, turnip greens, asparagus, spinach, and enriched food products.

Deficiency (in chickens)

• The hypovitaminosis B2 (riboflavin deficiency) is characterized with impaired oxidation processes and dystrophic changes in the peripheral nerves. The typical clinical sign are curled toes due to paralysis. In the beginning, the toes are slightly flexed and chickens tend to stand on their hocks. In moderate cases, a marked leg weakness and toe flexion in a different extent are observed.

• In severe cases, the toes are completely curled downward and inward and complete weakness of legs is present. A considerable improvement and relief could be expected if the treatment is initiated in the initial stage of the disease. Water soluble vitamins, that are easily utilized, are recommended.

Curled Toe Syndrome

Deficiency (in cats)• Clinical characteristics include anorexia, weight loss, hair loss,

conjunctivitis and corneal opacity, and even lead to cataracts. Incomplete paralysis of hind legs, testicular hypoplasia.

Riboflavin Toxicity

• No cases of riboflavin toxicity have been reported.

Sulfur

Sulfur Functions• It is necessary for formation of collagen, the protein found in

connective tissue in our bodies. • Sulfur is also present in keratin, which is necessary for the

maintenance of the skin, hair, and nails, helping to give strength, shape, and hardness to these protein tissues. Sulfur is also present in the fur and feathers of other animals.

• Sulfur, as cystine and methionine, is part of other important body chemicals: insulin, which helps regulate carbohydrate metabolism, and heparin, an anticoagulant.

• The sulfur-containing amino acids help form other substances as well, such as biotin, coenzyme A, lipoic acid, and glutathione. The mucopoly-saccharides may contain chondroitin sulfate, which is important to joint tissues.

Sulfur deficiency in cattle• Severe sulfur deficiency results in anorexia, weight loss, weakness,

dullness, emaciation, excessive salivation, and death. Marginal deficiencies of sulfur can reduce feed intake, digestibility, and microbial protein synthesis. A dietary limitation of sulfur can dramatically decrease microbial numbers as well as microbial digestion and protein synthesis. Impaired utilization of lactate by ruminal microorganisms, resulting in lactate accumulation in the rumen and blood, also can occur as a result of sulfur deficiency.

Sulfur Deficiency in Sheep

Sulfur toxicity in cattle• Acute sulfur toxicity is characterized by restlessness, diarrhea, muscular

twitching, dyspnea, and, in prolonged cases, inactivity followed by death. Concentrations of sulfur lower than those needed to cause clinical signs of toxicity can reduce feed intake and retard growth rate and decrease copper status. Consumption of water high in sulfate reduced feed and water intake. The maximum tolerable concentration of dietary sulfur has been estimated at 0.40 percent.

bibliography• http://www.health-writings.com/vitamin-deficiency-cats_7253/• http://www.thepoultrysite.com/publications/6/diseases-of-poultry/217/vi

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