A new species of Hystrignathus (Nematoda: Thelastomatoidea: Hystrignathidae) associated with the Bess Beetle Passalus Interruptus Linnaeus (Coleoptera: Passalidae) from The Peruvian Amazonia.

Bess beetles (Passalidae) are known to maintain biological interactions with a diverse gut symbiotic community, which is far from being well described since these communities from most of the species of Passalidae have not been studied. In order to improve our knowledge of these communities, we describe a new species of Nematoda of the genus Hystrignathus (Hystrignathidae) associated with Passalus interruptus, a bess beetle species of the tribe Passalini collected in Hunuco, Peru, in the Peruvian Amazonia. Hystrignathus nunashae n.

Diversity and host assemblage of avian haemosporidians in different terrestrial ecoregions of Peru.

Characterizing the diversity and structure of host-parasite communities is crucial to understanding their eco-evolutionary dynamics. Malaria and related haemosporidian parasites are responsible for fitness loss and mortality in bird species worldwide. However, despite exhibiting the greatest ornithological biodiversity, avian haemosporidians from Neotropical regions are quite unexplored.

[Enteroparasitosis in Peru and its relation to the Human Development Index].

Background: Diseases related to enteroparasites are a serious public health problem.

Objective: To assess the prevalence of enteroparasites in Peru and its relationship with the Human Development Index (HDI).

Material And Methods: A coproparasitological study using the direct method from children and adults from the communities of Pamplona Alta in Lima, the province of San Sebastián de Quera, Castillo Grande, Pillco Marca and Puelles in Huánuco, Llupa-Huaraz in Ancash, and Machaguay in Arequipa, Peru, was carried out from 2012 to 2016.

Diminutive, degraded but dissimilar: genomes from filarial nematodes do not conform to a single paradigm.

are alpha-proteobacteria symbionts infecting a large range of arthropod species and two different families of nematodes. Interestingly, these endosymbionts are able to induce diverse phenotypes in their hosts: they are reproductive parasites within many arthropods, nutritional mutualists within some insects and obligate mutualists within their filarial nematode hosts. Defining 'species' is controversial and so they are commonly classified into 17 different phylogenetic lineages, termed supergroups, named A-F, H-Q and S.

Shaking the Tree: Multi-locus Sequence Typing Usurps Current Onchocercid (Filarial Nematode) Phylogeny.

During the past twenty years, a number of molecular analyses have been performed to determine the evolutionary relationships of Onchocercidae, a family of filarial nematodes encompassing several species of medical or veterinary importance. However, opportunities for broad taxonomic sampling have been scarce, and analyses were based mainly on 12S rDNA and coxI gene sequences. While being suitable for species differentiation, these mitochondrial genes cannot be used to infer phylogenetic hypotheses at higher taxonomic levels.

Eye trematode infection in small passerines in Peru caused by Philophthalmus lucipetus, an agent with a zoonotic potential spread by an invasive freshwater snail.

Until now, four species of eye trematodes have been found in South America. Of them, Philophthalmus lucipetus (synonymized with Philophthalmus gralli) displays a broad host spectrum, with at least 30 bird species (prevalently large water birds), five mammal species and humans serving as definitive hosts, and with snails Fagotia (Microcolpia) acicularis, Amphimelania holandri, Melanopsis praemorsa and Melanoides tuberculata serving as intermediate hosts. When examining a total of 50 birds of ten species in the wetland of Pantanos de Villa, Lima, Peru in July 2011, eye trematodes were identified visually in the edematous conjunctival sac of 11 (48%) out of 23 resident many-colored rush tyrants Tachuris rubrigastra.