The development and morphology of Babesia bigemina in the gut of Boophilus microplus were studied during laboratory maintenance by: tick transmission in unsplenectomized (intact) calves; tick transmission in splenectomized calves; syringe passage at intervals of 5 days or less in splenectomized...

Pure strains of Babesia bovis, B. bigemina and Anaplasma marginale were isolated from cattle infected with all 3 species as well as a Theileria sp. and Eperythrozoon teganodes, using only transmission by the tick, Boophilus microplus. Unengorged adult ticks transferred to susceptible cattle...

Examples of Boophilus microplus (Can.) collected from calves in Queensland with patent infection by Anaplasma marginale were incubated at either 4--5, 14, 22, 27 or 37 deg C for up to 14 days. Extracts prepared from larvae, nymphs, immature females, adult males or mixtures of both sexes were...

Percentages of feeding ticks in which Babesia bigemina could be detected (infection rates) were determined following treatment of bovine hosts with each of 4 babesicides. Infection rates were suppresseed by imidocarb dipropionate, quinuronium sulphate and amicarbalide, reaching minimum levels 3-4...

Observations were made on the morphology and infectivity of Babesia bigemina in the gut of Boophilus microplus (Can.). The babesia parasites were derived from stabilates of a laboratory strain, prepared at intervals during several years of blood-passaging in cattle. Increased numbers of a...

Illustrated accounts are given of the life-cycle of Boophilus microplus and of the life-cycles and transmission of the parasites it transmits to cattle in Queensland, Australia -- Babesia bovis, B. bigemina and Anaplasma.ADDITIONAL ABSTRACT:In this article from Queensland, the life-cycles are...

In studies in Australia, 2 strains of Babesia bovis that had been serially blood passaged in splenectomised calves 27-33 times, a procedure known to have reduced their virulence for normal cattle, were shown to have low pathogenicity for replete females of Boophilus microplus (Can.). In comparison...

In 2 of 3 experiments, Boophilus microplus larvae infected with Babesia bigemina were released in a 2 to 4 g batch onto an artificially confined area (A) of a donor calf. A 2 g batch of uninfected larvae was released onto a confined area (B) on the other side of the calf. In experiment 1, the calf...

Percentages of larval ticks in which Babesia bovis and B. bigemina could be detected (infection rates) were determined after the larvae had been exposed to temperatures between 9 deg C and 27 deg C for periods of one to 35 days and then either fed on calves or heated at 37 deg C to stimulate...

Greater numbers of ticks were recovered from cattle experiencing initial tick-transmitted Babesia bovis infections than from comparably tick-infested cattle not infected with B. bovis.