A Microsporidian Infection in Phoronids (Phylum Phoronida):Microsporidium phoronidin. sp. from aPhoronis embryolabi

2017 ◽  
Vol 65 (3) ◽  
pp. 427-431 ◽  
Author(s):  
Elena N. Temereva ◽  
Yuliya Y. Sokolova
Keyword(s):  
Microsporidian Infection

Microsporidian infection in Atlantic salmon, Salmo salar L.

1992 ◽  
Vol 15 (2) ◽  
pp. 211-214 ◽  
Author(s):  
E. M. DRINAN ◽  
H. D. RODGER ◽  
R. PALMER
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Atlantic Salmon Salmo Salar ◽  
Microsporidian Infection

Ecological applications of pheromone trapping of Malacosoma disstria and Choristoneura conflictana

2008 ◽  
Vol 140 (5) ◽  
pp. 573-581 ◽  
Author(s):  
Brad C. Jones ◽  
Maya L. Evenden
Keyword(s):  
Population Density ◽  
Populus Tremuloides ◽  
Geographic Region ◽  
Malacosoma Disstria ◽  
Flight Period ◽  
Wing Area ◽  
Pheromone Trapping ◽  
Microsporidian Infection ◽  
Collection Date ◽  
Choristoneura Conflictana

AbstractThe forest tent caterpillar, Malacosoma disstria Hübner (Lepidoptera: Lasiocampidae), and large aspen tortrix, Choristoneura conflictana (Walker) (Lepidoptera: Tortricidae), are important pests of trembling aspen, Populus tremuloides Michx. (Salicaceae), in western Canada. Populations of both species can be monitored with sex pheromone-baited traps as part of an integrated pest management program. Moths captured in pheromone traps can also be used for ecological studies. Captured males of each species were examined to test the effect of population density, geographic region, and collection date on moth quality. Moth quality was assessed on the basis of wing area and level of infection with microsporidian parasites. The level of microsporidian infection of M. disstria was strongly dependent on geographic region but not on population density. Male M. disstria from high-density populations had smaller wings than males from endemic populations. Wing area of male M. disstria decreased throughout the flight period. Neither collection date nor microsporidian infection level affected wing area of male C. conflictana. Collection date also did not affect the level of microsporidian infection of C. conflictana. These data support pheromone trapping as a tool to detect microsporidian infections and examine their temporal and density-dependent effects on wing size in M. disstria and C. conflictana populations.

scholarly journals Microsporidian Infection in a Free-Living Marine Nematode

2012 ◽  
Vol 11 (12) ◽  
pp. 1544-1551 ◽  
Author(s):  
A. M. Ardila-Garcia ◽  
N. M. Fast
Keyword(s):  
Marine Nematode ◽  
Free Living ◽  
Content Type ◽  
Infection Pattern ◽  
Transmission Electron ◽  
Muscle Tissues ◽  
Natural Hosts ◽  
In The Wild ◽  
Microsporidian Infection

ABSTRACT Microsporidia are unicellular fungi that are obligate endoparasites. Although nematodes are one of the most abundant and diverse animal groups, the only confirmed report of microsporidian infection was that of the “nematode killer” ( Nematocida parisii ). N. parisii was isolated from a wild Caenorhabditis sp. and causes an acute and lethal intestinal infection in a lab strain of Caenorhabditis elegans . We set out to characterize a microsporidian infection in a wild nematode to determine whether the infection pattern of N. parisii in the lab is typical of microsporidian infections in nematodes. We describe a novel microsporidian species named Sporanauta perivermis (marine spore of roundworms) and characterize its infection in its natural host, the free-living marine nematode Odontophora rectangula. S. perivermis is not closely related to N. parisii and differs strikingly in all aspects of infection. Examination by transmission electron microscopy (TEM) revealed that the infection was localized in the hypodermal and muscle tissues only and did not involve the intestines. Fluorescent in situ hybridization (FISH) confirmed infection in the muscle and hypodermis, and surprisingly, it also revealed that the parasite infects O. rectangula eggs, suggesting a vertical mode of transmission. Our observations highlight the importance of studying parasites in their natural hosts and indicate that not all nematode-infecting microsporidia are “nematode killers”; instead, microsporidiosis can be more versatile and chronic in the wild.

Encephalomyelitis associated with microsporidian infection in farmed greater amberjack, Seriola dumerili (Risso)

2011 ◽  
Vol 34 (12) ◽  
pp. 901-910 ◽  
Author(s):  
S Miwa ◽  
T Kamaishi ◽  
T Hirae ◽  
T Murase ◽  
T Nishioka
Keyword(s):  
Seriola Dumerili ◽  
Greater Amberjack ◽  
Microsporidian Infection

SENSIBILITÉ DE ARCHIPS CERASIVORANUS (LEPIDOPTERA-TORTRICIDAE) À L’INFECTION PAR BACILLUS THURINGIENSIS

1972 ◽  
Vol 104 (8) ◽  
pp. 1153-1159 ◽  
Author(s):  
W. A. Smirnoff
Keyword(s):  
Bacillus Thuringiensis ◽  
Bacillus Cereus ◽  
Iodine Number ◽  
Low Temperatures ◽  
Physiological Condition ◽  
Commercial Preparation ◽  
Energy Value ◽  
Unsaturated Lipids ◽  
Archips Cerasivoranus ◽  
Microsporidian Infection

AbstractInfectivity tests revealed that sensitivity of larvae of Archips cerasivoranus Fitch to infection by a commercial preparation of Bacillus thuringiensis Berliner depends on the physiological condition of the insects (determined by age and nutrition), and temperature, but mostly on the presence or absence of infection by the microsporidia Plisliphora sp. and Nosema cerasivoranus Thomson.Mortality attributable to the bacillus was 90, 40, and 30% for healthy third-, fifth-, and seventh-instar larvae after 20 days, mortality reached 90% after 3, 9, and 19 days for larvae of the same ages naturally infected by microsporidia. Also, low temperatures decreased the effect of the pathogen and starvation reduced the resistance of larvae to infection.The results obtained suggest the action of B. thuringiensis in this tortricid is to provoke generalized septicemia rather than toxemia.Other infectivity tests made with cultures of B. thuringiensis and Bacillus cereus Frankland and Frankland confirmed these results. The action of the two bacteria was similar, both provoking septicemia in the insect. This effect was considerably increased by the presence of protozoan diseases.Analyses of unsaturated lipids by the iodine number method showed that infection by a microsporidian or B. thuringiensis lowered considerably the energy value index. The index reached 13.0, 25.5, and 27.0 in healthy larvae of third-, fifth-, and seventh-instar, was reduced to 5.2, 17.0, and 15.0 by a microsporidian infection, and to 7.5, 18.0, and 22.5 by a B. thuringiensis infection. When an infection with both pathogens was induced, the value decreased to 4.0, 8.0, and 7.5.

scholarly journals DNA Detection and Genotypic Identification of Potentially Human-Pathogenic Microsporidia from Asymptomatic Pet Parrots in South Korea as a Risk Factor for Zoonotic Emergence

2011 ◽  
Vol 77 (23) ◽  
pp. 8442-8444 ◽  
Author(s):  
So-Young Lee ◽  
Sung-Seok Lee ◽  
Young S. Lyoo ◽  
Hee-Myung Park
Keyword(s):  
Risk Factor ◽  
South Korea ◽  
Dna Detection ◽  
Encephalitozoon Cuniculi ◽  
Fecal Samples ◽  
Content Type ◽  
Microsporidian Infection ◽  
Genotypic Identification ◽  
Genotype Ii

ABSTRACTWe detected and identified genotypes of human-pathogenic microsporidia in fecal samples from 51 asymptomatic captive-bred pet parrots in South Korea. Microsporidia were identified in 8 samples (15.7%); 7 parrots tested positive forEncephalitozoon hellem, and 1 parrot tested positive for bothE. hellemandEncephalitozoon cuniculi. In genotypic identifications,E. hellemwas present in genotypes 1A and 2B andE. cuniculiwas present in genotype II. Pet parrots might be a source of human microsporidian infection.

Microsporidian infection of a marine nematode, Metoncholaimus scissus

1970 ◽  
Vol 16 (3) ◽  
pp. 371-377 ◽  
Author(s):  
B.E. Hopper ◽  
S.P. Meyers ◽  
R. Cefalu
Keyword(s):  
Marine Nematode ◽  
Microsporidian Infection
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