Some Digenetic Trematodes of Fishes of Friday Harbor, Washington

1960 ◽  
Vol 46 (2) ◽  
pp. 241 ◽  
Author(s):  
Hilda Lei Ching
Keyword(s):  
Digenetic Trematodes ◽  
Friday Harbor

REDESCRIPTION OF THE DIGENETIC TREMATODES LEPIDAPEDON CALLI AND L. PUGETENSIS ACENA, AND NEW HOST RECORDS FOR L. CALLI AND EURYCREADIUM VITELLOSUM MANTER FROM FISHES OF WASHINGTON STATE

1961 ◽  
Vol 39 (5) ◽  
pp. 615-621 ◽  
Author(s):  
Hilda Lei Ching
Keyword(s):  
Washington State ◽  
New Host ◽  
Digenetic Trematodes ◽  
Excretory Bladder ◽  
Friday Harbor ◽  
New Host Records

Lepidapedon calli Acena, 1947 and L. pugetensis Acena, 1947 are redescribed from types and paratypes and from additional specimens of L. calli collected at Friday Harbor, Washington, U.S.A. L. pugetensis is synonymized with L. elongatum (Lebour, 1908) Nicoll, 1915. The pleuronectid fish Microstomus pacificus is a newly reported host for L. calli and for Eurycreadium vitellosum Manter, 1934. Steringotrema (Rhodotrema) quinquelobata. Layman, 1930 is transferred to the genus Eurycreadium, becoming E. quinquelobata (Layman, 1930), because of its tubelike excretory bladder, extensive vitellaria, and type of cirrus sac.

5′-Nucleotidase activity and substrate affinity in digenetic trematodes

1985 ◽  
Vol 59 (3) ◽  
pp. 263-266 ◽  
Author(s):  
Afzal A. Siddiqui ◽  
Wajih A. Nizami
Keyword(s):  
Enzyme Activities ◽  
Substrate Affinity ◽  
Nucleotidase Activity ◽  
Digenetic Trematodes

ABSTRACT5′-nucleotidases of eight species of digenetic trematodes were studied using five different substrates. All species showed the following preferential order of substrate affinity; AMP>CMP>GMP>TMP>UMP. It was observed that different species occupying similar habitats possessed closely related levels of enzyme activities. The function of 5′-nucleotidases in trematodes is also suggested.

scholarly journals Prevalence of Gastrointestinal Parasitic Infections and Assessment of Deworming Program among Cattle and Buffaloes in Gampaha District, Sri Lanka

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Nayana Gunathilaka ◽  
Dimuthu Niroshana ◽  
Deepika Amarasinghe ◽  
Lahiru Udayanga
Keyword(s):  
Parasitic Infection ◽  
Parasite Prevalence ◽  
Parasitic Infections ◽  
Infection Prevalence ◽  
Digenetic Trematodes ◽  
Linear Modelling ◽  
Cattle Management ◽  
Veterinary Surgeon ◽  
Effect Of Treatment ◽  
The Difference

Gastrointestinal (GI) parasitic infection is a serious issue in cattle management. The effects of GI parasites may vary with age, sex of cattle, nutritional condition, and severity of infection. Prevalence of GI parasites among cattle population in Gampaha District has not been studied and there is no published study available. A total of 45 farms rearing cattle were selected randomly in three areas, namely, Kelaniya, Ganemulla, and Welisara, under three Veterinary Surgeon Divisions (VSD) in Gampaha District (Mahara, Gampaha, and Welisara). Freshly voided cattle fecal samples were collected randomly from the selected farms during March 2017–December 2017. Out of 163 cattle and buffaloes examined, 13.39% (n=22) were positive for eggs of one or more species of GI parasites. The prevalence of parasitic infection was higher in buffaloes (31.25%, 5/16) as compared to that of cows (11.56%, 21/147), but the difference was not significant (P >0.05). Hookworms (Bunostomum spp.), whipworms (Trichuris spp.), digenetic trematodes (Paramphistomum spp.), cestodes (Moniezia spp.), and oocysts of protozoans (coccidians) were found during the study. The nontreated animals indicated the highest percentage of parasitic infections accounting for 46.67% (n= 14), followed by partially treated individuals (15.15%, n= 5). GI parasite prevalence in males was higher when compared to that of females, but the difference was nonsignificant (P >0.05). General Linear Modelling (GLM) revealed that the effect of treatment status was significantly associated with the prevalence of GI parasites. The calves and yearlings had the highest rate of GI parasitic infections. The highest infection rate was observed at Kelaniya, followed by Welisara. Future investigations are necessary to evaluate the economic impact of GI parasites in the study areas.

THE GERM CELL CYCLE OF THE DIGENETIC TREMATODES

Science ◽  
1928 ◽  
Vol 68 (1760) ◽  
pp. 277-278 ◽  
Author(s):  
F. G. Brooks
Keyword(s):  
Cell Cycle ◽  
Germ Cell ◽  
Digenetic Trematodes
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