Developmental stages of Hepatozoon hemprichii sp. nov. infecting the skink Scincus hemprichii and the tick Hyalomma impeltatum from Saudi Arabia
| Autor: | Saleh Al-Quraishy, Kareem Morsy, Heinz Mehlhorn, Ali Al-Ghamdi, Abdel-Rahman Bashtar, Fathy A. Abdel-Ghaffar, Khaled Al-Rasheid |
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| Rok vydání: | 2011 |
| Předmět: |
Male
Erythrocytes Scincus Ixodidae Saudi Arabia Tick Parasitemia Apicomplexa Andrology Schizogony Eucoccidiida Parasite hosting Animals Lung Ecology Evolution Behavior and Systematics Life Cycle Stages biology Coccidiosis Lizards Anatomy biology.organism_classification Hepatozoon Liver Parasitology Arachnid Vectors Female Desert Climate Hyalomma Spleen |
| Zdroj: | The Journal of parasitology. 97(5) |
| ISSN: | 1937-2345 |
| Popis: | The life cycle of Hepatozoon hemprichi n. sp. is described; the vertebrate host is Scincus hemprichii and it is vectored by Hyalomma impeltatum. Erythrocytic stages of 18 ± 1.8 × 4 ± 0.8 µm developed in the hemocoel of ticks to sporozoites within 16-18 days. Schizogony occurred in the liver parenchyma and the endothelial cells of blood capillaries in lung and spleen. Mature schizonts measuring 27 ± 3.11 × 20.13 ± 3.0 µm produced 28 merozoites (on average). The merozoites were 13 ± 1.21 × 1.21 ± 0.72 µm with nuclei 5 ± 0.65 × 2.1 ± 0.51 µm. Syzygy and differentiation of gamonts took place in tick's hemocoel up to the third day post-infection (PI). The microgamont (16 ± 0.31 × 18 ± 0.42 µm) produced 4, uniflagellated microgametes at 4-5 days PI. The microgamete measured 15.2 ± 0.31 µm while the flagellum was always at least 26 µm. The macrogamete was very large in size (31 ± 3.11 µm) with a central nucleus. After fertilization, (5-6 days PI) zygotes developed into oocysts (55 ± 3.41 × 52 ± 4.11 µm) in which repeated mitotic divisions with centripetal invaginations occurred; each contained 18 banana-shaped sporozoites, 13.61 ± 0.8 × 1.2 ± 0.31 µm in size. Experimental transmission was successfully carried out by oral administration or by intra-peritoneal inoculation of the infective stages (sporozoites) to uninfected skinks and led to the appearance of blood stages after 5 wk and 4 wk, respectively. |
| Databáze: | OpenAIRE |
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