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Boophilus microplus: digestion of hemoglobins by the engorged female tick
Authors:J E O'Hagan
Affiliation:Division of Entomology, CSIRO, Long Pocket Laboratories, Indooroopilly, Brisbane, Queensland, Australia 4068
Abstract:When the cattle tick Boophilus microplus, after dropping from its host, was maintained at 27 C, the digestion of hemoglobins in the gut proceeded at a steady rate and was virtually complete by the 13th day. The rate was essentially the same whether the ticks were strains susceptible (Yeerongpilly) or resistant (Biarra) to organophosphorous compounds or whether the hosts were British breed, Brahman or banteng cattle, or buffalo. Ferrihemoglobin appeared in the gut contents and hematin was deposited. About 10% of the hematin released from the hemoglobin was transferred to the eggs and from them to the larvae. Translucent ticks, sometimes found on heavily infested hosts and referred to as “serum” ticks, had about half the normal hemoglobin content.
Keywords:Hematin  Hemoglobin Digestion  Cattle  Buffalo  Tick strains  Tick eggs  Translucent ticks  Spectrophotometry  Electrophoresis
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