A new myxosporean species is described from the fish Semaprochilodus insignis captured from the Amazon River, near Manaus. Myxobolus insignis sp. n. was located in the gills of the host forming plasmodia inside the secondary gill lamellae. The spores had a thick wall (1.5-2 microm) all around their body, and the valves were symmetrical and smooth. The spores were a little longer than wide, with...

Myxozoan spores were detected in fecal samples from three patients presenting with abdominal pain and/or diarrhea. The spores were identical to those of Myxobolus plectroplites, a previously described pathogen from the freshwater fish Plectroplites ambiguus. All patients had recently eaten fish caught from local waters, and frozen fillets of such fish were found to be infected with M. plectropl...

1 Instituto Butantan, Secretaria de Estado da Saúde de São Paulo, São Paulo, Brazil, 2 Departamento de Ensino e Pesquisa, Fundação de Medicina Tropical Doutor Heitor Vieira Dourado, Manaus, Brazil, 3 Escola Superior de Ciências da Saúde, Universidade do Estado do Amazonas, Manaus, Brazil, 4 Instituto de Ciências Biológicas, Universidade Federal do Amazonas, Manaus, Brazil, 5 Centro de Pesquisas...

Addressing the needs of Japan's rapidly ageing population is a major challenge for policy-makers. Yuji Kuroiwa tells Andréia Azevedo Soares why that challenge is an opportunity to boost wellbeing and growth.

Two new species of Myxozoa from the brain of the green knife fish Eigemannia virescens are described: Myxobolus inaequus sp. n. has an unusually large spore body and extremely unequal polar capsules, and Henneguya theca sp. n. has an attenuated spore encased in a sheath not previously described in other Myxozoa . Only spores of the two species were observed, and infections caused no obvious pat...

A Myxobolus sp., morphologically resembling M. toyamai, M. longisporus, and M. koi, was isolated from the gills of a koi, Cyprinus carpio, that died in an ornamental pond. Large plasmodia were localized within lamellae, causing severe disruption of the normal branchial architecture, sufficient to compromise respiration. Although the case isolate shared several features with the aforementioned s...

Three new species of the Afrotropical Tuberepyris are described and illustrated, T. nihilus Azevedo et Mugrabi, sp. nov. (Madagascar), T. codex Azevedo et Mugrabi, sp. nov. (South Africa), and T. hamus Azevedo et Mugrabi, sp. nov. (Central African Republic). The male of Tuberepyris is described for the first time. T. basibrevis Lanes et Azevedo from Tanzania is evaluated and the genus is redefi...

Description of a new species of Diaptomidae (Crustacea, Copepoda, Calanoida) Notodiaptomus oliveirai is given from the material obtained at a reservoir at Barra Bonita, SP in 1992. The new species is very similar to Notodiaptomus henseni Dahl 1894 although both species can be found in the same locality, constituting two distinct populations. Notodiaptomus oliveirai seems to be endowed with grea...

The development of rainbow trout Oncorhynchus mykiss strains that are resistant to whirling disease has shown promise as a management tool for populations in areas where Myxobolus cerebralis is present. However, the physiological effects of the disease on characteristics necessary for fish survival in natural river conditions have not been tested in many of these strains. Five rainbow trout str...