Acanthoparyphium spinulosum (Trematoda: Echinostomatidae) in Oysters at Port Isabel, Texas

1966 ◽  
Vol 52 (4) ◽  
pp. 663 ◽  
Author(s):  
John W. Little ◽  
Sewell H. Hopkins ◽  
Frank G. Schlicht
Keyword(s):  
Acanthoparyphium Spinulosum

Life Cycle of Acanthoparyphium spinulosum Johnston, 1917 (Echinostomatidae: Trematoda)

1961 ◽  
Vol 47 (5) ◽  
pp. 777 ◽  
Author(s):  
W. E. Martin ◽  
J. E. Adams
Keyword(s):  
Life Cycle ◽  
Acanthoparyphium Spinulosum

Life history of Acanthoparyphium spinulosum Johnston, 1917 (Trematoda: Echinostomatidae).

1960 ◽  
Vol 8 (2) ◽  
pp. 217 ◽  
Author(s):  
AJ Bearup
Keyword(s):  
Life History ◽  
Single Row ◽  
Two Generations ◽  
History Of ◽  
Acanthoparyphium Spinulosum

A list is given of the trematode cercariae which are commonly found in the estuarine gastropod, Pyrazus australis Quoy & Gaimard. These include: cercariae of a schistosome, Austrobilharzia terrigalensis Johnston, 1917, and of a heterophyid, Stictodora sp.; a monostomate xiphidiocercaria, probably belonging to the Microphallidae; two megalurous cercariae, probably belonging to the Philophthalmidae; and one echinostome cercaria. The life history of the latter, Acanthoparyphium spinulosum Johnston, 1917, is described. No sporocysts were found. Two generations of rediae precede the cercariae, which have a collar with 23 spines in a single row, as in the adult. Cercariae encyst readily in Salinator fragilis (Lamarck), another gastropod living in the same habitat. Cysts were also found occasionally in P. australis and in small polychaetes of the Phanaerocephala group. Adults were obtained by feeding S. fragilis, which contained encysted cercariae, to the silver gull, Larus novae-hollandiae.

scholarly journals Acanthoparyphium shinanense n. sp. (Digenea: Echinostomatidae) from Experimental Chicks Infected with Metacercariae Encysted in Brackish Water Clams in the Republic of Korea

2021 ◽  
Vol 59 (4) ◽  
pp. 341-353
Author(s):  
Seungwan Ryoo ◽  
Bong-Kwang Jung ◽  
Taehee Chang ◽  
Sooji Hong ◽  
Hyejoo Shin ◽  
...  
Keyword(s):  
Brackish Water ◽  
Ruditapes Philippinarum ◽  
Republic Of Korea ◽  
28S Rrna ◽  
Closely Related Species ◽  
5.8S Rrna ◽  
Worm Recovery ◽  
The Republic ◽  
Acanthoparyphium Spinulosum ◽  
First Intermediate Host

Acanthoparyphium shinanense n. sp. (Digenea: Echinostomatidae) is described from chicks experimentally infected with the metacercariae encysted in 2 brackish water clam species, Ruditapes philippinarum and Coecella chinensis, in the Republic of Korea. The metacercariae were round to oval, armed with 23 collar spines, and 0.216 (0.203-0.226) mm in diameter. From 5 chicks experimentally infected each with 200 metacercariae, 34 juvenile (5-day-old worms) and 104 adult flukes (7-day-old worms) were harvested from their small intestines, with the average worm recovery rate of 13.8%. The adult flukes were 3.18 (2.89-3.55) mm long and 0.68 (0.61-0.85) mm wide, with an elongated, posteriorly tapering body, and a prominent head collar armed with 23 collar spines arranged in a single uninterrupted row. The posterior testis of A. shinanense was longitudinally elongated, which is similar to Acanthoparyphium spinulosum Johnston, 1917 but unique from the other closely related species, including Acanthoparyphium tyosenense Yamaguti, 1939, Acanthoparyphium kurogamo Yamaguti, 1939, and Acanthoparyphium marilae Yamaguti, 1934. The eggs of A. shinanense were larger than those of A. spinulosum, and the anterior extent of 2 lateral groups of vitellaria was slightly more limited in A. shinanense than in A. spinulosum. Molecular analysis of nuclear and mitochondrial genes revealed low homology with A. spinulosum from USA (96.1% in 5.8S rRNA) and Ukraine (97.9% in 28S rRNA), Acanthoparyphium n. sp. from USA (98.0% in 28S rRNA), and Acanthoparyphium sp. from Australia, Kuwait, and New Zealand. Biological characteristics, including its first intermediate host and natural definitive hosts, as well as its zoonotic capability, should be elucidated.

The excystment, growth and reproduction of Acanthoparyphiutn spinulosum Johnston, 1917 (Trematoda) in chicks fed various diets

Parasitology ◽  
1970 ◽  
Vol 60 (1) ◽  
pp. 61-78 ◽  
Author(s):  
John W. Little
Keyword(s):  
Vitamin D ◽  
Vitamin A ◽  
Public Health Service ◽  
Normal Diet ◽  
Protein Diet ◽  
New Haven ◽  
Carbohydrate Source ◽  
Complete Diet ◽  
Acanthoparyphium Spinulosum ◽  
Growth And Reproduction

Studies have been made of the growth and excystment of a trematode, Acanthoparyphium spinulosum, in chicks fed on various denned diets.Day-old chicks were fed metacercariae and maintained on deficient as well as complete rations for periods up to 20 days. The excystment rate was determined by the number of worms that were recovered from the metacercariae. The largest number of worms were recovered from chicks that received a normal diet with starch as the sole carbohydrate source. The smallest percentage of parasites was found in birds that had received a normal diet with sucrose serving as the carbohydrate source. About 25 % were recovered from chicks fed several other diets.The trematodes developed and grew well in vitamin A deficient chicks; there was a large number of intra-uterine ova observed in worms from these hosts. Acanthoparyphium spinulosum from chicks fed a ‘no vitamin D’ diet grew at a normal rate until the 6th day; after this they grew more slowly than 6-day-old worms in chicks fed the ‘no vitamin A’ diet.The lengths of worms from birds deprived of all vitamins differed little from those of the parasites recovered from the chicks deficient in vitamin D. The largest worms were obtained from chicks fed a complete diet with starch as the sole carbohydrate source.Parasites from chicks fed a diet 50 % deficient in carbohydrates (with sucrose as the carbohydrate) developed normally.Worms also developed in chicks fed a ‘no protein’ diet with starch and a ‘no protein’ diet with sucrose. A deleterious effect on ova production was observed in worms from both these groups.Metacercariae developed in chicks fed a ‘no carbohydrate’ diet, but no mature worms were recovered due to the reduced life of the host. Starvation of the hosts produced small worms containing few intra-uterine ova.The growth curve of A.spinulosum was plotted and compared with Echino-paryphium flexum.This investigation was supported in part by U.S. Public Health Service Grant UI-00202, and by a grant-in-aid of research by the Society of the Sigma Xi, New Haven, Connecticut.

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