Seasonal Occurrence and Host-Parasite Relationships of Neoechinorhynchus saginatus Van Cleave and Bangham 1949 in the Fallfish, Semotilus corporalis (Mitchill)

1978 ◽  
Vol 64 (5) ◽  
pp. 860 ◽  
Author(s):  
Patrick M. Muzzall ◽  
Wilbur L. Bullock
Keyword(s):  
Seasonal Occurrence ◽  
Semotilus Corporalis ◽  
Host Parasite

Seasonal occurrence, recruitment, and maturation of Allocreadium lobatum Wallin, 1909 (Digenea: Allocreadiidae) in the fallfish, Semotilus corporalis Mitchell, in a New Brunswick, Canada, lake system

1985 ◽  
Vol 63 (3) ◽  
pp. 612-616 ◽  
Author(s):  
Thomas G. Rand ◽  
Michael D. B. Burt
Keyword(s):  
New Brunswick ◽  
Annual Cycle ◽  
Parasite Population ◽  
Seasonal Occurrence ◽  
Intermediate Hosts ◽  
Temperature Changes ◽  
Mean Intensity ◽  
Host Diet ◽  
Low Prevalence ◽  
Semotilus Corporalis

The seasonal occurrence, recruitment, and maturation dynamics of Allocreadium lobatum (Digenea: Allocreadiidae) infecting the fallfish, Semotilus corporalis, from the Magaguadavic Lakes system, New Brunswick, Canada, were studied from May 1978 through July 1978 and from February 1979 through November 1980. Allocreadium lobatum has an annual cycle with both low mean intensity and low prevalence of infection occurring from July through September and increasing to high levels from November through May. Parasite recruitment, marked by the presence of a high percentage (≥ 58%) of immature and mature worms in fallfish, is greater from August through November but occurs intermittantly throughout the year. From February through July at least 60% of the parasite population is composed of gravid individuals which die after oviposition. The seasonality of parasite occurrence, recruitment, and maturation cycles is discussed in relation to temperature changes of the water, host diet, and trends in the occurrence of amphipods which are the second intermediate hosts of A. lobatum.

Host–parasite relations and seasonal occurrence of Paragordius tricuspidatus and Spinochordodes tellinii (Nematomorpha) in Southern France

2005 ◽  
Vol 244 (1) ◽  
pp. 51-57 ◽  
Author(s):  
Andreas Schmidt-Rhaesa ◽  
David G. Biron ◽  
Cécile Joly ◽  
Frédéric Thomas
Keyword(s):  
Seasonal Occurrence ◽  
Southern France ◽  
Host Parasite

The Pathogenesis of Experimental Mycotic Encephalitis

1969 ◽  
Vol 27 ◽  
pp. 356-357
Author(s):  
James A. Swenberg ◽  
Adalbert Koestner ◽  
R.P. Tewari
Keyword(s):  
Electron Microscopy ◽  
Pathogenetic Mechanisms ◽  
Host Parasite

Previous investigations of pathogenetic mechanisms in mycotic encephalitis have been restricted to light microscopic and mycologic approaches. In this study, electron microscopy was utilized to determine the mode of vascular penetration and the cellular and subcellular host-parasite interrelationships in brains of mice infected with Oidiodendron kalrai. This newly isolated fungus was selected because of its ability to consistently produce encephalitis with gross and microscopic lesions similar to those observed in naturally occuring mycoses.

Examination of Schistosome Cercariae and Schistosomules by Scanning Electron Microscopy

1969 ◽  
Vol 27 ◽  
pp. 50-51
Author(s):  
D. Johnson ◽  
P. Moriearty
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
High Resolution ◽  
Light Microscopy ◽  
Surface Structure ◽  
Extensive Study ◽  
Scanning Microscopy ◽  
Host Parasite ◽  
Conventional Electron Microscopy ◽  
Scanning Electron

Since several species of Schistosoma, or blood fluke, parasitize man, these trematodes have been subjected to extensive study. Light microscopy and conventional electron microscopy have yielded much information about the morphology of the various stages; however, scanning electron microscopy has been little utilized for this purpose. As the figures demonstrate, scanning microscopy is particularly helpful in studying at high resolution characteristics of surface structure, which are important in determining host-parasite relationships.

Seasonal occurrence and hatching of calanoid eggs in sediments of the northern Baltic Sea

1998 ◽  
Vol 171 ◽  
pp. 133-143 ◽  
Author(s):  
T Katajisto ◽  
M Viitasalo ◽  
M Koski
Keyword(s):  
Baltic Sea ◽  
Seasonal Occurrence

Birds eaten by King James V of Scotland in 1525–1533, and the prices decreed by his daughter Mary Queen of Scots in 1551

2006 ◽  
Vol 33 (1) ◽  
pp. 135-139
Author(s):  
W. R. P. Bourne
Keyword(s):  
Quantitative Information ◽  
Seasonal Occurrence ◽  
Household Accounts

The household accounts of King James V of Scotland provide the first quantitative information on the seasonal occurrence of birds there, and some first records.

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