. The pathology and differential diagnosis of infectious diseases of animals. Veterinary medicine -- Diagnosis; Communicable diseases in animals. 356 TEXAS FEVER from ticks they would not when kept together in small enclosures transfer the disease to susceptible animals, but that when susceptible cattle become infested with the ticks either by grazing in infested pastures or by having placed upon them young ticks hatched in the laboratory the disease appeared. The infection of northern cattle with Texas fever bv. Fig. 95. Photograph of animal sick with Texas fever. {Photo- graphed by Connaway)
. The pathology and differential diagnosis of infectious diseases of animals. Veterinary medicine -- Diagnosis; Communicable diseases in animals. 356 TEXAS FEVER from ticks they would not when kept together in small enclosures transfer the disease to susceptible animals, but that when susceptible cattle become infested with the ticks either by grazing in infested pastures or by having placed upon them young ticks hatched in the laboratory the disease appeared. The infection of northern cattle with Texas fever bv. Fig. 95. Photograph of animal sick with Texas fever. {Photo- graphed by Connaway). southern animals consists therefore in first infesting them with the cattle '- The number of ticks necessary to carr}' the disease is small so that frequently they will not be observ^ed unless the sick animals are carefully examined. The life *It is interesting to add the results of an experiment conducted by Dr. Cooper Curtice in the Bureau of Animal Industry which shows the necessity of the tick in inoculating cattle. In a tick infested district in the south, a field was cleared of ticks by fencing and keeping cattle off for a year. Susceptible northern cattle were transported to and placed in this field where they thrived for a season. The second year they were placed in a second cleared pasture where they kept well for an- other year. The third year they were placed in a tick infested pasture where they died promptly of Texas Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Moore, Veranus A. (Veranus Alva), 1859-1931. Ithaca, N. Y. , Taylor & Carpenter
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