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Pavla Bartošová-Sojková, Alena Lövy, Cecile C Reed, Martina Lisnerová, Tereza Tomková, Astrid S Holzer, Ivan Fiala
INTRODUCTION: Intertidal rock pools where fish and invertebrates are in constant close contact due to limited space and water level fluctuations represent ideal conditions to promote life cycles in parasites using these two alternate hosts and to study speciation processes that could contribute to understanding the roles of parasitic species in such ecosystems. MATERIAL AND METHODS: Gall bladder and liver samples from five clinid fish species (Blenniiformes: Clinidae) were morphologically and molecularly examined to determine the diversity, prevalence, distribution and host specificity of Ceratomyxa parasites (Cnidaria: Myxozoa) in intertidal habitats along the coast of South Africa...
2018: PloS One
Patricia Santos Matos, Diehgo Tuloza da Silva, Igor Hamoy, Edilson Matos
Hoferellus azevedoi n. sp. was found in the urinary bladder of Chaetobranchus flavescens Heckel, 1840 from the Arari River on Marajó Island in Pará, Brazil. This is the first record of a species of the genus Hoferellus in a host from the Brazilian Amazon region. The new species has disporous and polysporous plasmodia, which vary in size and shape, with some being found adhered to the epithelium of the urinary bladder, and others floating in the liquid. The mature spores are sub-spherical in the sutural view, with a number of peripheral projections around the whole surface of the spore...
February 12, 2018: Parasitology Research
Diego Henrique Mirandola Dias Vieira, Vinícius Panciera Tagliavini, Vanessa Doro Abdallah, Rodney Kozlowiski de Azevedo
A new species of myxozoan, Myxobolus imparfinis n. sp. is described based on material from the gills of Imparfinis mirini (Haseman) (Heptapteridae). Mature myxospores are round, measuring 7.1-8.4 (7.9 ± 0.3) μm in length, 4.5-6.2 (5.5 ± 0.5) μm in width and 3.1-4.2 (3.7 ± 0.3) μm in thickness. The polar capsules are of unequal size, the larger polar capsule measuring 3.4-4.5 (3.9 ± 0.3) μm in length and 1.4-2.0 (1.7 ± 0.1) μm in width and the smaller capsule measuring 3.1-3.8 (3.4 ± 0.2) μm in length and 1...
February 1, 2018: Systematic Parasitology
C T Gürkanlı, S Okkay, Y Çiftçi, V Yurakhno, A Özer
Myxosporeans of the genus Ortholinea have a worldwide distribution and infect organs and tissues of exclusively marine fishes. Here we describe the morphological and molecular characteristics of Ortholinea mullusi sp. nov. parasitizing the urinary bladder and kidney tubules of red mullet Mullus barbatus collected from the coastal zone of Sinop in the Black Sea, Turkey. Polysporic plasmodia with immature spores were either elongate, 37.0 ± 4.5 SD (30-50) µm long and 45.0 ± 3.8 (40-55) µm wide, or were round, up to 100...
January 31, 2018: Diseases of Aquatic Organisms
Suellen Aparecida Zatti, Stephen D Atkinson, Antônio A M Maia, Jerri L Bartholomew, Edson A Adriano
We describe three new Henneguya spp. (Myxobolidae) found parasitizing two species of cichlid fish from the Amazon basin, Brazil: H. tucunarei n. sp. from gill filaments of Cichla monoculus and H. tapajoensis n. sp. from gill filaments of Cichla pinima, both from the Tapajós River, Pará State and H. jariensis n. sp. in the fins of Cichla monoculus from the Jari River, Amapá State. We based descriptions on myxospore morphology and small subunit ribosomal DNA sequences, and used a phylogenetic analysis to compare the new Henneguya species with known relatives...
January 27, 2018: Parasitology Research
Are Nylund, Haakon Hansen, Øyvind J Brevik, Håvard Hustoft, Turhan Markussen, Heidrun Plarre, Egil Karlsbakk
BACKGROUND: The myxosporean parasite Parvicapsula pseudobranchicola commonly infects farmed Atlantic salmon in northern Norway. Heavy infections are associated with pseudobranch lesions, runting and mortality in the salmon populations. The life-cycle of the parasite is unknown, preventing controlled challenge experiments. The infection dynamics, duration of sporogony, tissue tropism and ability to develop immunity to the parasite in farmed Atlantic salmon is poorly known. We conducted a field experiment, aiming at examining these aspects...
January 6, 2018: Parasites & Vectors
Harpreet Kaur, Aditya Gupta
A new myxobolid, Thelohanellus pathankotensis parasitizing gill lamellae and caudal fins of the Indian minor carp Labeo dero has been described using light microscopy, histopathology and molecular analyses. The fish host was collected from a cold water wetland, Ranjit Sagar Wetland, Punjab, India located 32 ̊ 26 ̍ 30 ̎ N Latitude and 75 ̊ 43 ̍ 30 ̎ E Longitude. The prevalence of infection was 30%. The plasmodia were located in the gill lamellae and the caudal fins were cylindrical and whitish, 0.8-1.0 mm in size containing about 150-300 myxospores...
November 22, 2017: Zootaxa
Carlos F Ruiz, Jacob M Rash, Cova R Arias, Doug A Besler, Raphael Orélis-Ribeiro, Matthew R Womble, Jackson R Roberts, Micah B Warren, Candis L Ray, Stacey Lafrentz, Stephen A Bullard
We used microscopy and molecular biology to provide the first documentation of infections of Myxobolus cerebralis (Myxozoa: Myxobolidae), the etiological agent of whirling disease, in trout (Salmonidae) from North Carolina (USA) river basins. A total of 1085 rainbow trout Oncorhynchus mykiss, 696 brown trout Salmo trutta, and 319 brook trout Salvelinus fontinalis from 43 localities across 9 river basins were screened. Myxospores were observed microscopically in pepsin-trypsin digested heads of rainbow and brown trout from the Watauga River Basin...
November 21, 2017: Diseases of Aquatic Organisms
B Sayyaf Dezfuli, G Castaldelli, L Giari
The histopathology and ultrastructure of the intestine of mullets, Liza ramada and Liza saliens, from Comacchio lagoons (northern Italy) naturally infected with myxozoans and helminths were investigated and described. Sixty-two (80.5%) of 77 mullets harboured one or more of the following parasites species: Myxobolus mugchelo (Myxozoa), Neoechinorhynchus agilis (Acanthocephala), Haplosplanchnus pachysomus and Dicrogaster contractus (Digenea). Co-occurrence of helminths with myxozoans was common. The main damage caused by digeneans was destruction of the mucosal epithelium of the villi, necrosis and degeneration of intestinal epithelial cells...
October 24, 2017: Journal of Fish Diseases
Diego Henrique Mirandola Dias Vieira, Gema Alama-Bermejo, Jerri Lee Bartholomew, Vanessa Doro Abdallah, Rodney Kozlowiski de Azevedo
Plasmodia containing myxospores belonging to the genus Myxobolus Bütschli, 1882 were found in the ovaries and liver of Salminus hilarii. Despite its economic value, this fish host has no previous reports of myxozoan infections. Herein, we describe Myxobolus batalhensis n. sp. using morphological and ultrastructural data, as well as histological and SSU rDNA molecular data. The mature myxospores were elongated, measuring in average 15.2 ± 0.8 μm in length, 8.4 ± 0.4 μm in width, and 5.1 ± 0.2 μm in thickness...
December 2017: Parasitology Research
Bo Zhang, Yanhua Zhai, Yang Liu, Zemao Gu
Two species of Myxobolus Bütschli, 1882 were found in yellow catfish Tachysurus fulvidraco (Richardson). A species of Myxobolus infecting the gills was morphologically identified as Myxobolus voremkhai (Akhmerov, 1960) and it was characterised here with additional morphological and molecular data. The other species of Myxobolus infecting the host's skin did not conform to any known myxosporean species. It is characterised by the presence of round, black or milky white plasmodia with black spots. Myxospores are pyriform in frontal view and lemon-shaped in lateral view, measuring 12...
September 27, 2017: Folia Parasitologica
Peng Li, Bing-Wen Xi, Xin Zhao, Jun Xie
In this report, a new myxosporean species, Myxobolus linzhiensis n. sp. (Cnidaria: Myxozoa: Bivalvulida), was described from the endemic cyprinid Schizothorax oconnori inhabiting the Yarlung Tsangpo River in the Tibetan plateau, China. The whitish ellipsoidal plasmodia of M. linzhiensis n. sp. grew under the epithelium of gill filaments, 1.7-mm long and 0.4-mm wide, and were found in the 3 of 8 examined S. oconnori (37.5%). Mature spores appeared suborbicular in frontal view, fusiform shaped in lateral view with tapering anterior, measuring 11...
November 2017: Parasitology Research
Aditya Gupta, Harpreet Kaur
The Indian major carp, Labeo rohita Hamilton, 1822 is a tropical freshwater cyprinid fish native to inland waters in Asia. Herein, we describe a novel myxozoan forming plasmodia in the gill lamellae of L. rohita from Ranjit Sagar Wetland in Punjab, India. Myxospores were consistent with the genus Myxobolus, round to elliptical in valvular view, lemon shaped in side view with a characteristic protrusion at the anterior end and a round posterior end; length 7.65 ± 0.07 μm, width 4.62 ± 0.09 μm. There were two polar capsules of equal length, pear shaped, length of polar capsule 2...
October 2017: Microbial Pathogenesis
Abdel-Azeem S Abdel-Baki, Hussain A Al-Qahtani, Saleh Al-Quraishy, Lamjed Mansour
A novel myxosporean species, Ceratomyxa azevedoi sp. n. is described from the gallbladder of the blackspot snapper, Lutjanus ehrenbergii (Peters), captured from the Arabian Gulf off Saudi Arabia. A total of 45 (26.8%) out of 168 fish specimens were found to be infected with Ceratomyxa azevedoi sp. n., the highest prevalence being observed in winter (42.9%, 18/42) and the lowest in autumn (11.9%, 5/42). Mature spores appeared as crescent to slightly elliptical-shaped, measuring 5-7 (6) μm in length and 12 (10-14) μm in thickness, with spherical polar capsules containing three polar filament coils...
October 2017: Parasitology Research
Gadi Piriatinskiy, Stephen D Atkinson, Sinwook Park, David Morgenstern, Vera Brekhman, Gilad Yossifon, Jerri L Bartholomew, Tamar Lotan
Myxozoa is a diverse, speciose group of microscopic parasites, recently placed within the phylum Cnidaria. Myxozoans are highly reduced in size and complexity relative to free-living cnidarians, yet they have retained specialized organelles known as polar capsules, akin to the nematocyst stinging capsules of free-living species. Whereas in free-living cnidarians the stinging capsules are used for prey capture or defense, in myxozoans they have the essential function of initiating the host infection process...
August 21, 2017: Scientific Reports
Graça Casal, Sérgio C São Clemente, Leila Lopes, Sónia Rocha, Nilza Felizardo, Elsa Oliveira, Saleh Al-Quraishy, Carlos Azevedo
This paper describes light and ultrastructural observations and molecular analysis of a fish-infecting myxosporean, Henneguya gilbert n. sp., which was found infecting the gill epithelium of the commercially important freshwater teleost fish Cyphocharax gilbert (Curimatidae) collected in the estuarine region of Guandu River, Rio de Janeiro State, Brazil. The parasite occurs in the gills, forming whitish spherical to ellipsoidal polysporic cysts measuring up to ~ 750 μm, and displaying asynchronous development...
October 2017: Parasitology Research
Eigo Kato, Akihiro Kasai, Hisayuki Tomochi, Ying-Chun Li, Hiroshi Sato
Approximately three dozen Myxobolus spp. (Myxozoa: Myxosporea: Bivalvulida) have been described to parasitize the gills of carp of the genera Cyprinus and Carassius. Hitherto, these fish were often introduced to temperate waters worldwide as food and ornamental fish from Asia, their place of origin. The present study examined the myxosporean infection of seven common carp (Cyprinus carpio) and seven Japanese silver crucian carp (Carassius langsdorfii) collected from the Fushinogawa River around the university in Yamaguchi City, Japan, during the period April 2015 to October 2016...
July 5, 2017: Parasitology Research
X H Liu, V N Voronin, A S Dudin, D A Morozova, J Y Zhang
Extensive sampling to get rich data is very important to resolve the current taxonomic problem of Chloromyxum genus and elucidate the nature phylogenetic relationships among congeneric species. During the parasitological survey of cyprinid fish in Gulf of Finland off the coast of St. Petersburg, a new Chloromyxum species, named as Chloromyxum peleci sp. n., was found to infect the gall bladder of sichel, Pelecus cultratus (L.). Here, we provided the morphological, ultrastructural, and molecular features to describe it...
August 2017: Parasitology Research
Harpreet Kaur, Ranjeet Singh, Anu Katoch, Rajni Attri, Shoaib Ali Dar, Aditya Gupta
A synopsis of 52 nominal species of the genus Thelohanellus Kudo, 1933 reported to infect freshwater fishes in India is presented. These species infect various organs such as gills, fins, scales, skin, muscles, gall bladder, kidney etc. The diagnostic features of the genus include tear-shaped myxospores with smooth shell valves and single polar capsule. The members are histozoic in their nature of parasitism infecting fresh water fishes. The present manuscript is aimed to compile the list of reported species in India along with essential information on morphometrics of vegetative stage, host, organ preference and pathogenic effects if any...
June 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
Sayef Laamiri
First parasitological surveys of Myxozoa are performed on the sparid saddled seabream Oblada melanura (Linnaeus, 1758) and the serranid painted comber Serranus scriba (Linnaeus, 1758) caught from the Bay of Bizerte and the Gulf of Tunis respectively in Northeast Tunisia, Western Mediterranean. In this study, 6 bivalvulid myxosporean species belonging to the 3 genera Ceratomyxa Thélohan, 1892, Myxodavisia Zhao, Zhou, Kent & Whipps, 2008 and Zschokkella Auerbach, 1910, are isolated infecting their hosts. Two species Ceratomyxa sp...
May 19, 2017: Zootaxa
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