Texas cattle fever

Definition

A severe, often fatal hemolytic disease of cattle caused by intraerythrocytic piroplasmid parasites, primarily Babesia bigemina and Babesia bovis (order Piroplasmida, phylum Apicomplexa), transmitted by ixodid ticks of the former genus Boophilus (now Rhipicephalus microplus and R. annulatus). Characterized by fever, anemia, hemoglobinuria ('redwater'), icterus, and high mortality in naive animals. Historically restricted the northern expansion of cattle ranching in North America until the 1906 federal tick eradication campaign; the disease remains endemic in tropical and subtropical regions worldwide where vector ticks persist.

Etymology

Named for the geographic association with Texas and the southern United States, where the disease was first recognized as a major cattle industry threat in the late 19th century; 'fever' refers to the persistent pyrexia in infected animals.

Example

The 1893 discovery by Theobald Smith and Fred Kilborne that Boophilus ticks transmitted Babesia bigemina established Texas cattle fever as the first documented arthropod-borne disease of livestock, laying groundwork for modern vector control and acaricide-based eradication programs.

Synonyms

• redwater
• cattle tick fever
• bovine babesiosis

Related Terms

• Babesia
• piroplasmid
• Rhipicephalus microplus
• tick-borne disease
• vector-borne parasite
• hemolysis
• acaricide
• tick eradication
• Zoonosis

Usage Notes

The term is primarily veterinary and historical; 'bovine babesiosis' is preferred in current international scientific literature. 'Redwater' emphasizes the hemoglobinuria sign but is also used for other hemolytic conditions (e.g., leptospirosis, copper toxicity). The disease is notifiable in many jurisdictions. Vector competence is restricted to one-host ticks of the R. microplus complex, unlike three-host ticks that transmit other Babesia species.