Development of Paramphistomum sukari Dinnik, 1954 (Trematoda: Paramphistomidae) in a snail host

Abstract

The development of Paramphistomum sukari Dinnik in a snail host is described with the emphasis laid on the succession of redial generation.The sporocyst gives birth to about twenty to thirty rediae. These rediae of the first generation commence with the production of daughter rediae then enter the second phase of their productivity during which they produce cercariae. The daughter rediae, or the rediae of the second generation, repeat these two phases during their lives, commencing with redial production and after that changing to the production to cercariae. Both the first- and second-generation rediae are able to produce a few daughter rediae at the end of their life. There is evidence that the subsequent generations of rediae are also able to give birth to daughter rediae and cercariae.As a result the successive generations of rediae maintain the infection in an intermediate host for a long time, probably as long as the infected snail can survive.

A molecular approach for identification of paramphistomes from Africa and Asia

“…It is possible that C. microbothrium or other paramphistomes play the same role in increasing the susceptibility of some planorbid snails to other species of Schistosoma Weinland, 1858 including S. haematobium (Bilharz, 1852) Weinland, 1858 and S. mansoni Sambon, 1907, both significant human parasites. Infection of Biomphalaria pfeifferi Krauss, 1848, an important snail host of S. mansoni, with Paramphistomum sukari Dinnik, 1954was reported (Dinnik and Dinnik, 1954, 1957Dinnik, 1965;Graber and Daynes, 1974). Our finding of a paramphistome infection {P4} in Biomphalaria sudanica Martens, 1870, another important snail host of S. mansoni in Africa, is of interest in this regard.…”

The Epizootiology of Haemonchosis in Sheep

“…canforfu.~ takc three to five weeks to reach the infective stage at 50°F, and at 40'F development ceases altogether. Also Dinnik and Dinnik (1958) in Kenya found that no larvae were produced below the temperature range of a mean maximum of 70" and a mean minimum of 50°F.…”

Paramphistomosis of Ruminants: An Emerging Parasitic Disease in Europe

“…Despite their ubiquitous presence, our current knowledge of the fundamental molecular and developmental biology of rumen fluke is limited, particularly in comparison to other trematodes of veterinary significance such as the liver fluke, Fasciola hepatica. For instance, histochemical staining, as well as morphological and ultrastructural studies, have detailed the anatomy of several paramphistome species [3,5,28,29], but such work has largely focused on larval stages within the intermediate host or adult rumen-dwelling flukes that are easier to collect, mostly belonging to tropical and sub-tropical species of paramphistome to date. To our knowledge, the development of various organ systems (e.g.…”