The microsporidian Kabatana arthuri (Lom, Dyková et Shaharom, 1990) induced severe regressive changes in trunk muscles of Pangasius sutchi (Fowler) from Thailand. Necrotic changes developed in muscle fibres around the developmental stages and on the periphery of giant aggregates of spores. The main feature of the host defence reaction was the phagocytic activity of macrophages. Inflammatory reaction was only exceptionally observed. Spore-laden macrophages were found in various tissues and organs; their infiltration in epidermis including its outermost layers may effectively enhance the spread of infection while the hosts still live.
Recent observational results are reviewed, concerning circumstellar
disks, the structure of the flow in highly collimated jets, the nature of Herbig-Haro objects and the interrelation between jets, cometary reflection nebulae and bipolar molecular outflows.
Specimens of the recently established European round goby (Neogobius melanostomus Pallas, 1811) and, tubenose goby (Proterorhinus marmoratus Pallas, 1811) were collected from different locations in the St. Clair River and Lake St. Clair, USA and were examined for parasites. Parasites were observed in 76% of the round gobies and 35% of the tubenose gobies. Four species of parasites in the gobies occur in the Black Sea watershed. Two of them have been reported in North America for the first time: Sphaeromyxa sevastopoli Naidenova, 1970 and Ichthyocotylurus pileatus (Rudolphi, 1802). Three parasite species found in the gobies are endemic to North America and were most likely obtained locally.
In this paper, studies on zoonotic cutaneous leishmaniasis (ZCL) are reviewed that were performed during the last ten years largely by scientists of the Martsinovsky Institute of Medical Parasitology and Tropical Medicine. New data on the taxonomy of Leishmania circulating in populations of Rhombomys opimus, their main host, and the results of field and laboratory studies allowed revision of certain concepts generally accepted in epidemiology and epizootology of ZCL in Central Asia.