The Development of Theileria sergenti in the Salivary Glands of the Tick, Haemaphysalis longicornis

Abstract

The development of Theileria sergenti in the salivary glands of adult Haemaphysalis longicornis ticks was morphologically studied during 4 days of tick's feeding on rabbits. Theileria sergenti demonstrated three forms of development (primary, secondary and tertiary sporoblasts) in the process of budding into sporozoites in the glands for 1 to 4 days. It was clear that the sporozoites were formed in the acinar cells of those glands and that most of them were released from the hollow cytoplasmic area of these cells by the 4th day.