Haemogregarina bigemina (Protozoa: Apicomplexa: Adeleorina) - past, present and future

摘要: This paper reviews past, current and likely future research on the fish haemogregarine, Haemogregarina bigemina Laveran et Mesnil, 1901. Recorded from 96 species of fishes, across 70 genera 34 families, this broad distribution for H. is questioned. In its type hosts other parasite undergoes intraerythrocytic binary fission, finally forming mature paired gamonts. An intraleukocytic phase also reported, but not hosts. asks whether stages white cell series are truly bigemina. A aim should be to compare molecular constitution so-called a number locations determine all represent same species. The transmission between fishes considered. Past studies show that young acquire haemogregarine when close metamorphosis, vertical faecal-oral seem unlikely. Some haemogregarines leech-transmitted, where populations with have been studied, these annelids largely absent. However, haematophagous larval gnathiid isopods occur such may readily eaten by them. Sequential squashes gnathiids demonstrated development in isopods. Examination histological sections through now underway precise sites particularly merozoites invade salivary glands. To assist procedure clarify internal anatomy gnathiids, 3D visualisation stacked, serial being undertaken. Biological experiments follow processes.