Diversity and fluctuation in ciliate protozoan population in the rumen of cattle

2016 ◽  
Vol 87 (9) ◽  
pp. 1188-1192 ◽  
Author(s):  
Arfan Abrar ◽  
Haruki Watanabe ◽  
Tasuku Kitamura ◽  
Makoto Kondo ◽  
Tomomi Ban‐Tokuda ◽  
...  
Keyword(s):  
Ciliate Protozoan

scholarly journals Cryptocaryon irritans, a ciliate parasite of an ornamental reef fish yellowtail tang Zebrasoma xanthurum

2019 ◽  
Vol 28 (4) ◽  
pp. 750-753
Author(s):  
Pedro Henrique Magalhães Cardoso ◽  
Herbert Sousa Soares ◽  
Maurício Laterça Martins ◽  
Simone de Carvalho Balian
Keyword(s):  
Treatment Period ◽  
Reef Fish ◽  
Copper Concentration ◽  
Therapeutic Agent ◽  
Clinical Signs ◽  
Skin Scraping ◽  
White Spot Disease ◽  
Ciliate Protozoan ◽  
Cryptocaryon Irritans ◽  
White Spots

Abstract Cryptocaryon irritans is an obligate parasitic ciliate protozoan of wild and cultured marine fish. It causes white spot disease, and infections with this pathogen can cause significant losses for aquarists and commercial marine cultures worldwide. This study reports the occurrence of C. irritans parasitizing the ornamental reef fish, yellowtail tang, Zebrasoma xanthurum. Six days after being introduced to a new environment, 11 yellowtail tangs had white spots scattered across their bodies and fins. Suspicion of infection with C. irritans was evaluated by scraping the skin to confirm clinical diagnosis. After confirmation, the yellowtail tangs were transferred to a hospital aquarium and treated with the therapeutic agent Seachem Cupramine® for 15 days. During the treatment period, the copper concentration was monitored daily. At the end of the treatment, none of the yellowtail tangs showed clinical signs of white spots on their bodies, and skin scraping confirmed the yellowtail tangs were no longer infected. Subsequently, the yellowtail tangs were released for sale.

Influence of dietary docosahexaenoic acid supplementation on the overall rumen microbiota of dairy cows and linkages with production parameters

2014 ◽  
Vol 60 (5) ◽  
pp. 267-275 ◽  
Author(s):  
Valeria A. Torok ◽  
Nigel J. Percy ◽  
Peter J. Moate ◽  
Kathy Ophel-Keller
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Docosahexaenoic Acid ◽  
Dairy Cows ◽  
Bacterial Communities ◽  
Ciliate Protozoan ◽  
Rumen Microbiota ◽  
Production Parameters ◽  
Enteric Methane ◽  
Archaeal Communities

The rumen microbiota contributes to greenhouse gas emissions and has an impact on feed efficiency and ruminant product fatty acid composition. Dietary fat supplements have shown promise in reducing enteric methane production and in altering the fatty acid profiles of ruminant-derived products, yet in vivo studies on how these impact the rumen microbiota are limited. In this study, we investigated the rumen bacterial, archaeal, fungal, and ciliate protozoan communities of dairy cows fed diets supplemented with 4 levels of docosahexaenoic acid (DHA) (0, 25, 50, and 75 g·cow−1·day−1) and established linkages between microbial communities and production parameters. Supplementation with DHA significantly (P < 0.05) altered rumen bacterial and archaeal, including methanogenic archaeal, communities but had no significant (P > 0.05) effects on rumen fungal or ciliate protozoan communities. Rumen bacterial communities of cows receiving no DHA were correlated with increased saturated fatty acids (C18:0 and C11:0) in their milk. Furthermore, rumen bacterial communities of cows receiving a diet supplemented with 50 g DHA·cow−1·day−1 were correlated with increases in monounsaturated fatty acids (C20:1n-9) and polyunsaturated fatty acids (C22:5n-3; C22:6n-3; C18:2 cis-9, trans-11; C22:3n-6; and C18:2n-6 trans) in their milk. The significant diet-associated changes in rumen archaeal communities observed did not result in altered enteric methane outputs in these cows.

scholarly journals Monoculture of the ciliate protozoan Euplotes sp. (Ciliophora; Hypotrichia) fed with different diets

2013 ◽  
Vol 35 (1) ◽  
Author(s):  
Guilherme De Freitas Côrtes ◽  
Monica Yumi Tsuzuki ◽  
Emílio Mateus Costa Melo
Keyword(s):  
Ciliate Protozoan

scholarly journals An NAD+-dependent glutamate dehydrogenase cloned from the ruminal ciliate protozoan,Entodinium caudatum

2005 ◽  
Vol 247 (2) ◽  
pp. 113-121 ◽  
Author(s):  
C. James Newbold ◽  
Neil R. McEwan ◽  
Roger E. Calza ◽  
Emilie N. Chareyron ◽  
Stéphane M. Duval ◽  
...  
Keyword(s):  
Glutamate Dehydrogenase ◽  
Ciliate Protozoan

A new low cost microbiotest with the freshwater ciliate protozoan Spirostomum ambiguum

Hydrobiologia ◽  
1996 ◽  
Vol 325 (2) ◽  
pp. 121-130 ◽  
Author(s):  
A. Le Dû-Delepierrel ◽  
G. Persoone ◽  
C. A. Grolière
Keyword(s):  
Low Cost ◽  
Ciliate Protozoan ◽  
Spirostomum Ambiguum

scholarly journals THE EFFECT OF STRYCHNINE AND LIGHT ON PIGMENTATION IN BLEPHARISMA UNDULANS STEIN

1966 ◽  
Vol 28 (2) ◽  
pp. 145-153 ◽  
Author(s):  
John R. Kennedy
Keyword(s):  
Cell Surface ◽  
Artificial Light ◽  
Cell Organelles ◽  
Ciliate Protozoan ◽  
Pigment Granules

The effect of strychnine sulfate and light on pigmentation in the ciliate protozoan Blepharisma undulans has been determined. Upon exposure of cells to strychnine, the pigment granules become loosened from their surrounding membranes. Eventually these membranes break and the granules are simultaneously released from the cell. At the cell surface, a fusion occurs between adjacent membraneless granules with the incorporation of membrane fragments. This fusion of granules and membrane fragments results in the formation of a pigmented "capsule" around the organism. After elimination of the pigment, the granule membranes remaining in the cytoplasm fuse to form apparently empty vesicles. Other cell organelles are generally undisturbed. A similar situation occurs upon exposure of cells to artificial light for 12 to 18 hr, however, the slow elimination of granules from the cells under these conditions does not result in the formation of a pigmented "capsule." The possible mechanisms of these reactions are discussed.

Epibiosis and hyperepibiosis on Pagurus bernhardus (Crustacea: Decapoda) from the west Coast of Scotland

2012 ◽  
Vol 93 (5) ◽  
pp. 1351-1362 ◽  
Author(s):  
Gregorio Fernandez-Leborans ◽  
Patricia Dávila ◽  
Eva Cerezo ◽  
Cristina Contreras
Keyword(s):  
Spatial Distribution ◽  
West Coast ◽  
Sampling Area ◽  
The West ◽  
Diverse Range ◽  
Ciliate Protozoan ◽  
Invertebrate Species ◽  
Pagurus Bernhardus ◽  
First Time ◽  
Protozoan Species

The presence of a diverse range of epibionts was found on Pagurus bernhardus from the west coast of Scotland. The invertebrate species found on the shell inhabited by the crab were the hydrozoans Hydractinia echinata and Dycorine conferta, the cirripeds Balanus balanus and Balanus crenatus, the polychaetes Hydroides norvegica, Pomatoceros triqueter and Circeis armoricana, and the molluscs Hiatella arctica and Anomia ephippium. On the crab were observed the polychaete Circeis armoricana and the amphipod Podoceropsis nitida. In addition, on the gastropod shells occupied by P. bernhardus, ciliate protozoan species were found attached to the hydrozoan Dycorine conferta, this being hyperepibiosis. These ciliates were 6 suctorian (Conchacineta constricta, Corynophrya anisostyla, Actinocyathula homari, Actinocyathula crenata, Acineta sulcata and Acineta corophii), and one peritrich species (Zoothamnium sp.). This is the first time that this hyperepibiosis was observed. In contrast to the epibiont communities observed in previous surveys in the same sampling area, basibiont specimens without D. conferta did not show ciliate epibionts. The ciliate epibionts also were not present on the surface of the shell and crab in specimens with D. conferta; they only appeared in hyperepibiosis on the surface of the hydrozoan. The spatial distribution and abundance of the invertebrate epibiont species were analysed, as well as the morphology, taxonomy and distribution of the ciliate hyperepibionts.

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