This study provides the first investigation on acquisition of parasites in invasive O. niloticus by parasite species native Cichlidae from Igarapé Fortaleza basin, Northern Brazil. There were examined 576 specimens 16 cichlids and collected main channel floodplain area this tributary Amazon River. The was poorly parasitized having only Ichthyophthirius multifiliis, Trichodina centrostrigeata, Paratrichodina africana, nobilis (Protozoa) Cichlidogyrus tilapiae (Monogenoidea), host has not...

The zebrafish, Danio rerio, is an important vertebrate model organism across various scientific disciplines. current study reports the nematode larva, Eustrongylides sp., presence, in zebrafish from a pet shop, acquired by Fundação Oswaldo Cruz for toxicity studies. Morphological and molecular data this are given herein, contributing to understanding of helminth aiding future occurrence larva demonstrates importance controlling management D. since fish widely used as experimental model.

Achatina fulica or "giant African snail" is an exotic species, considered to be one of the world's hundred most invasive causing serious environmental damages. In present study we report, for first time, occurrence Aelurostrongylus abstrusus infecting A.fulica in Amazon region. This nematode described parasitizing mainly pulmonary system felines, which causes "aelurostrongilose", also known as feline cardio-pulmonary strongyloidosis. New morphometric data third stage larvae are presented...

Third-stage larvae (L3) of Hysterothylacium sp. were collected by the first time in juveniles pirarucu Arapaima gigas farmed Rio Preto da Eva, Amazonas state. Ninety-eight (98) out 100 examined fish showed to be parasitized. Five hundred and ninety from intestines, stomach pyloric caeca. The mean intensity parasite indexes was 6.02 (±5.75) ranging 1 40 per host abundance 5.9 (±5.76). A. is new record for Brazil, this (Nematoda: Anisakidae) with zoonotic potential South America.

Pseudorhabdosynochus jeanloui n. sp. (Monogenoidea, Diplectanidae) is described from specimens collected the gills of Pacific creolefish, Paranthias colonus (Perciformes, Serranidae) a fish market in Chorrillos, Lima, Peru. The new species differentiated other members genus by structure its sclerotized vagina, which has two spherical chambers similar diameter. This first coast America, third reported South America and member Paranthias.

The nematode Philometra katsuwoni Petter & Baudin-Laurencin, 1986, a gonad-infecting parasite of Katsuwonus pelamis (Linneaus 1758), originally described from the Gulf Guinea, is reported for first time coastal zone Rio de Janeiro State, Brazil. As compared with original description, males Brazilian material are generally somewhat larger and their right spicule gubernaculum longer. subgravid female time. It characterized by anterior inflation esophagus presence two distinct caudal lobes.

During a survey of the helminth fauna characiform fishes from Tocantins River, Brazil, 185 fish specimens 22 species were studied. Twelve Nematoda and nine Digenea collected. Some these reported for first time in their hosts, thus representing new host records: Procamallanus (Spirocamallanus) sp. Bivibranchia notata, Brycon pesu, Chalceus macrolepidotus, Hemiodus microlepis unimaculatus; inopinatus Triportheus elongatus; Goezia (larva) Boulengerella cuvieri; Rhabdochona acuminata pesu...

Pseudempleurosoma gibsoni n. sp. (Monogenea: Ancyrocephalidae) is described from the oesophagus of Paralonchurus brasiliensis (Steindachner) off coast Brazil. The type-species Yamaguti, 1965, P. carangis redescribed and diagnosis genus amended. Metadiplectanotrema Gerasev et al. 1987 considered synonym Pseudempleurosoma. This now contains four species, including carangis, caranxi al., comb., myripristi comb. one new species.

The objective of the present study was to analyze seasonality parasitic helminths Leporinus macrocephalus from fish farms in municipality Cruzeiro do Sul, Acre, Brazil, and their parasitism rates. Between June 2014 March 2015, 200 specimens were sampled two farms: one with a semi-intensive system other an extensive (100 each farm: 50 during dry season rainy season). Fifteen species parasites found, seasonal variations some according farming system. In farm, there greater prevalence infection...

ABSTRACT In the Amazon, growing demand for fish has been boosting expansion of farms. However, intensification cultivation can generate disequilibrium in parasite-host environment, predisposing to parasitic infections. The objective this study was evaluate community structure metazoan parasites systems piauçu, Leporinus macrocephalus, state Acre, Brazil. We examined 100 specimens from a semi-intensive system (earth tanks) and an extensive (dams). Overall 66.5% hosts were parasitized....

Between March and October 2008, 355 specimens of Pygocentrus nattereri were collected from the lowland lakes Central Amazonia, Brazil, to study their nematode fauna. A total 1.116 Nematoda collected, belonging six species. Procamallanus (Spirocamallanus) inopinatus was species with highest parasite indices. Larvae Anisakis sp. have zoonotic potential found parasitizing intestine liver nattereri. Some these new records for host P. The diversity nematodes that use as a indicates important role...

Larval stages and adults of Procamallanus (Spirocamallanus) pereirai Annereaux, 1946 are described from naturally infected Paralonchurus brasiliensis (Steindachner) (Sciaenidae) the coast State Rio de Janeiro, Brazil. The translucent first-stage larvae have a denticulate process at anterior end, no buccal capsule or esophagus undifferentiated into muscular posterior glandular parts an elongate tail; third-stage tail with three terminal projections, divided portion 12-20 ridges running to...

Procamallanus (Spirocamallanus) halitrophus Fusco and Overstreet, 1978 from the intestines of flounders (Syacium papillosum Citharichthys macrops) coast State Rio de Janeiro, Brazil, is redescribed. This study, which based on results obtained by light scanning electron microscopy, clarifies many morphological aspects this species. Some taxonomic features, such as cephalic structures, topography cuticle, vulva, localization caudal papillae males, excretory pore, are observed for first time....

A new oxyuroid nematode, Ichthyouris nunani n. sp., is described from the intestine of freshwater benthopelagic characiform fishes Laemolyta taeniata and Curimata acutirostris, both which were caught in Tocantins River, State Maranhão, Brazil. The species easily distinguished all other genus mainly because distribution male caudal papillae, morphology spicule, fact that eggs have an operculum many long, thread-like filaments at each pole. This first helminth hosts, this report contributes to...

A new species of Choricotyle parasitizing the marine fish Ctenosciaena gracilicirrhus (Teleostei: Sciaenidae) from Angra dos Reis, Rio de Janeiro, Brazil (23°00′24″S; 44°19′05″W) is proposed. rohdei n.sp. differs all other genus mainly by number genital spines, which varies 28 to 30, whereas others present 7 12 spines.

Opecoeloides Odhner, 1928, is represented by 19 valid species found in marine fish, of which five have been reported Brazil. Specimens pedicathedrae Travassos, Freitas & Bührnheim, 1966, were collected from the intestine smooth weakfish Cynoscion leiarchus, a new host record, off coast Rio de Janeiro, They examined using light and confocal laser microscopy. New partial sequences 18S 28S rDNA genes O. obtained. Bayesian inference analysis on dataset resulted phylogram formed...

Abstract Populations of freshwater species have been declining rapidly and are becoming extinct. Thus, understanding distribution, trends patterns is required. The Munim River basin situated in a region with phytogeographic interface between the Amazon Cerrado biomes. Although ichthyofauna currently relatively well-known, data on its helminth fauna scarce. present study aimed to characterize nematofauna Bryconops cf. affinis (Günther) Saxatilia brasiliensis (Bloch) from two different...

Abstract The genus Enenterum Linton, 1910 comprises species which parasitize herbivorous kyphosid fish. In the present study, a new is described based on fresh specimens collected from Kyphosus incisor Rio de Janeiro. characterized by having oral sucker infundibuliform with 10 lobes, prepharynx two times longer than pharynx, presence of oesophagus, testes slightly lobed, round ovary and rectum muscular sphincter connected to anus. New genetic sequences include partial 18S 28S rDNA...

Two species of nematodes belonging to the genus Ichthyouris Inglis, 1962 (I. ro and I. bursata), were collected from cichlid fish Mesonauta festivus in central Brazilian Amazon region. Both are reported thislocality for first time. bursata is a new host, M. festivus, this report parasitizing its type host Brazil. We provide more detailed description ro, including morphological aspects that not mentioned original description.