scholarly journals Heterosporis finki, a microsporidian parasite of the angel fish Pterophyllum scalare: pathology and ultrastructure

1989 ◽  
Vol 7 ◽  
pp. 103-109 ◽  
Author(s):  
C Michel ◽  
J Maurand ◽  
C Loubès ◽  
S Chilmonczyk ◽  
P de Kinkelin
Keyword(s):  
Microsporidian Parasite ◽  
Pterophyllum Scalare

Efficacy of Terminalia catappa-AgNP nanocomposite towards Saprolegnia parasitica infection in angelfish (Pterophyllum scalare) eggs

Aquaculture ◽  
2021 ◽  
pp. 736914
Author(s):  
Juliana Oliveira Meneses ◽  
Izadora Cibely Alves da Silva ◽  
Ana Flávia Santos da Cunha ◽  
João Carlos Nunes de Souza ◽  
Victor Ruan Silva Nascimento ◽  
...  
Keyword(s):  
Saprolegnia Parasitica ◽  
Terminalia Catappa ◽  
Pterophyllum Scalare

scholarly journals Effects of Prebiotics and Probiotics on Honey Bees (Apis mellifera) Infected with the Microsporidian Parasite Nosema ceranae

2021 ◽  
Vol 9 (3) ◽  
pp. 481
Author(s):  
Daniel Borges ◽  
Ernesto Guzman-Novoa ◽  
Paul H. Goodwin
Keyword(s):  
Apis Mellifera ◽  
Honey Bees ◽  
Bifidobacterium Bifidum ◽  
Nosema Ceranae ◽  
Food Supplementation ◽  
Microsporidian Parasite ◽  
Single Strain ◽  
Acacia Gum ◽  
Bee Health ◽  
Commercial Probiotics

Nosema ceranae is a microsporidian fungus that parasitizes the midgut epithelial cells of honey bees, Apis mellifera. Due to the role that midgut microorganisms play in bee health and immunity, food supplementation with prebiotics and probiotics may assist in the control of N. ceranae. The dietary fiber prebiotics acacia gum, inulin, and fructooligosaccharides, as well as the commercial probiotics Vetafarm Probotic, Protexin Concentrate single-strain (Enterococcus faecium), and Protexin Concentrate multi-strain (Lactobacillus acidophilus, L. plantarum, L. rhamnosus, L. delbrueckii, Bifidobacterium bifidum, Streptococcus salivarius, and E. faecium) were tested for their effect on N. ceranae spore loads and honey bee survivorship. Bees kept in cages were inoculated with N. ceranae spores and single-dose treatments were administered in sugar syrup. Acacia gum caused the greatest reduction in N. ceranae spore numbers (67%) but also significantly increased bee mortality (62.2%). However, Protexin Concentrate single-strain gave similarly reduced spore numbers (59%) without affecting the mortality. In a second experiment, multiple doses of the probiotics revealed significantly reduced spore numbers with 2.50 mg/mL Vetafarm Probotic, and 0.25, 1.25, and 2.50 mg/mL Protexin Concentrate single-strain. Mortality was also significantly reduced with 1.25 mg/mL Protexin Concentrate single-strain. N. ceranae-inoculated bees fed 3.75 mg/mL Vetafarm Probotic had higher survival than N. ceranae-inoculated bees, which was similar to that of non-inoculated bees, while N. ceranae-inoculated bees fed 2.50 mg/mL Protexin Concentrate single-strain, had significantly higher survival than both N. ceranae-inoculated and non-inoculated bees. Protexin Concentrate single-strain is promising as it can reduce N. ceranae proliferation and increase bee survivorship of infected bees, even compared to healthy, non-infected bees.

Use of eugenol for the anaesthesia and transportation of freshwater angelfish (Pterophyllum scalare)

Aquaculture ◽  
2019 ◽  
Vol 513 ◽  
pp. 734409 ◽  
Author(s):  
Crislaine Palmeira Barbosa de Oliveira ◽  
Carlos Henrique da Paixão Lemos ◽  
Altiery Felix e Silva ◽  
Seldon Almeida de Souza ◽  
Ana Catarina Luscher Albinati ◽  
...  
Keyword(s):  
Pterophyllum Scalare

New insights on the genetic diversity of the honeybee parasiteNosema ceranaebased onmultilocussequence analysis

Parasitology ◽  
2013 ◽  
Vol 140 (11) ◽  
pp. 1346-1356 ◽  
Author(s):  
MATHIEU ROUDEL ◽  
JULIE AUFAUVRE ◽  
BRUNO CORBARA ◽  
FREDERIC DELBAC ◽  
NICOLAS BLOT
Keyword(s):  
Ribosomal Rna ◽  
Evolutionary History ◽  
Nucleotide Diversity ◽  
Selective Pressure ◽  
Population Divergence ◽  
Environmental Cues ◽  
Microsporidian Parasite ◽  
High Nucleotide Diversity ◽  
Single Host ◽  
Parasite Populations

SUMMARYThe microsporidian parasiteNosema ceranaeis a common pathogen of the Western honeybee (Apis mellifera) whose variable virulence could be related to its genetic polymorphism and/or its polyphenism responding to environmental cues. Since the genotyping ofN. ceranaebased on unique marker sequences had been unsuccessful, we tested whether amultilocusapproach, assessing the diversity of ten genetic markers – encoding nine proteins and the small ribosomal RNA subunit – allowed the discrimination betweenN. ceranaevariants isolated from singleA. melliferaindividuals in four distant locations. High nucleotide diversity and allele content were observed for all genes. Most importantly, the diversity was mainly present within parasite populations isolated from single honeybee individuals. In contrast the absence of isolate differentiation precluded anytaxadiscrimination, even through amultilocusapproach, but suggested that similar populations of parasites seem to infect honeybees in distant locations. As statistical evolutionary analyses showed that the allele frequency is under selective pressure, we discuss the origin and consequences ofN. ceranaeheterozygosity in a single host and lack of population divergence in the context of the parasite natural and evolutionary history.

Infection of American smelt in Lake Ontario and Lake Erie with the microsporidian parasite Glugea hertwigi (Weissenberg)

1972 ◽  
Vol 50 (9) ◽  
pp. 1183-1188 ◽  
Author(s):  
M. Chen ◽  
G. Power
Keyword(s):  
Digestive Tract ◽  
Lake Erie ◽  
Ovarian Tissue ◽  
Lake Ontario ◽  
Parasite Load ◽  
Sexual Differences ◽  
Striking Difference ◽  
Female Fish ◽  
Microsporidian Parasite ◽  
Male Fish

In samples taken monthly throughout the year the percentage of American smelt in Lake Ontario and Lake Erie containing cysts of Glugea hertwigi was 5.2% and 62.7% respectively. Sexual differences in incidence were observed, the significance of which was uncertain as results from the two lakes were contradictory.In male fish infection was almost entirely restricted to the digestive tract with few cysts in the liver, skin, and testes. In female fish the digestive tract and ovaries were similarly infected.Seasonal fluctuations in Glugea infection were obvious and seemed correlated with the gonadal cycle. In both sexes the highest parasite load corresponded with the onset of maturation.A striking difference in fecundity between the two smelt populations was attributed to the Glugea infection. In females parasite cysts replaced ovarian tissue, causing a reduction in the number of maturing eggs.

Spironucleus vortens N. Sp. from the Freshwater Angelfish Pterophyllum scalare: Morphology and Culture

1995 ◽  
Vol 42 (6) ◽  
pp. 731-742 ◽  
Author(s):  
SARAH L. POYNTON ◽  
WILLIAM FRASER ◽  
RUTH FRANCIS-FLOYD ◽  
PHILLIP RUTLEDGE ◽  
PEGGY REED ◽  
...  
Keyword(s):  
Pterophyllum Scalare

scholarly journals Description of the Microsporidian Parasite, Heterosporis sutherlandae n. sp., Infecting Fish in the Great Lakes Region, USA

PLoS ONE ◽  
2015 ◽  
Vol 10 (8) ◽  
pp. e0132027 ◽  
Author(s):  
Nicholas B. D. Phelps ◽  
Sunil K. Mor ◽  
Aníbal G. Armién ◽  
Katharine M. Pelican ◽  
Sagar M. Goyal
Keyword(s):  
Great Lakes ◽  
Great Lakes Region ◽  
Microsporidian Parasite

scholarly journals Early ontogenesis of the angelfish, Pterophyllum scalare Schultze, 1823 (Cichlidae)

2012 ◽  
Vol 10 (3) ◽  
pp. 567-576 ◽  
Author(s):  
Agata Korzelecka-Orkisz ◽  
Zuzanna Szalast ◽  
Dorota Pawlos ◽  
Izabella Smaruj ◽  
Adam Tañski ◽  
...  
Keyword(s):  
Developmental Stages ◽  
Artemia Salina ◽  
The Body ◽  
Pigment Cells ◽  
Alkaline Ph ◽  
Membrane Structures ◽  
Egg Membrane ◽  
Newly Hatched Larvae ◽  
Item Size ◽  
Pterophyllum Scalare

This study describes the egg membrane structures of angelfish (Pterophyllum scalare), morpho-physiological changes during angelfish embryogenesis from activation to hatching under optimal conditions (28°C; pH 6.8), the developing larvae and fry, the effect of alkaline pH on the early developmental stages of the species, the relationship between food item size and fry survival. Egg membranes (thin, transparent, 1.67-2.18 µm thick) are covered by a sticky substance. The amber-coloured angelfish eggs were oval in shape, with average diameters of 1.436 and 1.171 mm, i.e., a mean volume of 1.033 ± 0.095 mm³. The survival rate of embryos and larvae kept in water with an elevated, slightly alkaline pH was very low: as few as 2% of the embryos survived, while in the batch kept in optimal water conditions very few eggs died. The first larvae hatched after 1288 h of embryonic development. The newly hatched larvae measured on average 2.60 ± 0.093 mm and had large (0.64 ± 0.077 mm³) yolk sacs. They attached themselves to the substrate with a secretion of thin, viscous threads, which was released from glands situated on the top of the head. The glands vanished on day 5. The 1-day-old larvae showed the first pigment cells on the body and the eyes of the 2-day-olds were already fully pigmented. Between day 4 and 5 of larval life, the larvae began feeding on live food. The 23-day-old fry looked like a miniature versions of the adults. Mortality of the angelfish larvae during their first days after hatching was higher in those fed brine shrimp (Artemia salina) nauplii than those fed protozoans and rotifers.

Infection by a vertically-transmitted microsporidian parasite is associated with a female-biased sex ratio and survival advantage in the amphipod Gammarus roeseli

Parasitology ◽  
2007 ◽  
Vol 134 (10) ◽  
pp. 1363-1367 ◽  
Author(s):  
E. R. HAINE ◽  
S. MOTREUIL ◽  
T. RIGAUD
Keyword(s):  
Sex Ratio ◽  
Species Interactions ◽  
Negative Effects ◽  
Microsporidian Parasite ◽  
Host Fitness ◽  
Gammarus Roeseli ◽  
Ratio Distortion ◽  
Biased Sex Ratio ◽  
Host Parasite ◽  
Specific Virulence

SUMMARYVertically transmitted parasites may have positive, neutral or negative effects on host fitness, and are also predicted to exhibit sex-specific virulence to increase the proportion or fitness of the transmitting sex. We investigated these predictions in a study on the survival and sex ratio of offspring of the amphipod Gammarus roeseli from females infected by the vertically transmitted microsporidia Nosema granulosis. We found, to our knowledge, the first evidence for a positive relationship between N. granulosis infection and host survival. Infection was associated with sex ratio distortion, not by male-killing, but probably by parasite-induced feminization of putative G. roeseli males. This microsporidia also feminizes another amphipod host, Gammarus duebeni, which is phylogenetically and biogeographically distant from G. roeseli. Our study suggests that the reproductive system of gammarids is easily exploited by these vertically-transmitted parasites, although the effects of infections on host fitness may depend on specific host-parasite species interactions.

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