Host–parasite–environment relationship, morphology and molecular analyses of Henneguya eirasi n. sp. parasite of two wild Pseudoplatystoma spp. in Pantanal Wetland, Brazil

Henneguya cuniculator sp. nov., a parasite of spotted sorubim Pseudoplatystoma corruscans in the São Francisco Basin, Brazil

“…nov. presented a conspicuous layer of slightly electrondense fibrous material spreading throughout the periphery. This material is similar to that observed in the periphery of H. pseudoplatystoma and H. eirasi (Naldoni et al 2009(Naldoni et al , 2011. According to Naldoni et al (2009), this electron-dense fibrous material corresponds to actin filaments and may play a role in the support of the plasmodium.…”

“…Henneguya pseudoplatystoma was found infecting gill filaments of pintado hybrids from fish farms, causing stretching and deformation of these structures, leading to a reduction of the functional area of the epithelium (Naldoni et al 2009). H. eirasi was found parasitizing gill filaments of P. corruscans and P. reticulatum from natural environments in the Brazilian Pantanal wetland, and produced only slight compression of the adjacent tissues (Naldoni et al 2011). H. corruscans was described infecting the gill lamellae from P. corruscans from natural environments in the Paraná River and caused hypertrophy of the infected lamella (Eiras et al 2009).…”

“…Since then, 5 other species have been described: H. pseudoplatystoma Naldoni et al, 2009, was found infecting hybrid pintado taken from fish farms in the states of São Paulo and Mato Grosso do Sul, and H. eirasi Naldoni et al, 2011, H. multiplasmodialis Adriano et al, 2012, Henneguya m. Carriero et al, 2013, and Myxobolus flavus Carriero et al, 2013, were found infecting both P. corruscans and P. reticulatum taken from natural environments in the Brazilian Pantanal wetland (Naldoni et al 2009, Carriero et al 2013). …”

Parasitofauna de cachara cultivado em tanque-rede no rio Paraguai

“…As informações disponíveis são restritas a peixes oriundos do ambiente natural (Santos et al, 2003;Barros et al, 2006Barros et al, , 2009Campos et al, 2008Campos et al, , 2009aNaldoni et al, 2011). Recentemente, Pádua et al (2013) observaram infestações por Epistylis sp.…”

“…taxas de prevalência com importantes lesões tissulares, especialmente em animais mantidos em cativeiro, como descrito para Henneguya pseudoplatystoma em surubim híbrido (Naldoni et al, 2009), e para H. eirasi em pintado e cachara (Naldoni et al, 2011). No presente trabalho, também foram registradas altas taxas de prevalência desses parasitos, possivelmente em razão da facilidade na transmissão horizontal com o adensamento populacional.…”