The Life-history of a Marine Trematode, Hamacreadium Mutabile Linton, 1910

Parasitology ◽  
1929 ◽  
Vol 21 (1-2) ◽  
pp. 220-225 ◽  
Author(s):  
Oliver R. McCoy
Keyword(s):  
Life History ◽  
General Relationship ◽  
Small Fish ◽  
Intermediate Hosts ◽  
Marine Snail ◽  
Pyloric Caeca ◽  
The Family ◽  
History Of ◽  
Relationship Of ◽  
Gray Snapper

A cotylocercous cercaria occurring in the marine snail, Astraea americana, at Tortugas, Florida, was found to encyst in small fish as second intermediate hosts.Fish experimentally infested with the cysts were fed to the gray snapper, Neomaenis griseus, and adult worms developed in the intestine and pyloric caeca which were identified as Hamacreadium mutabile Linton, 1910, a member of the sub-family Allocreadiinae.A general relationship of the cotylocercous cercariae to the family Allocreadiidae is discussed.

On Crepidostomum farionis O. F. Müll. (= Stephanophiala laureata Zeder), a Distome Parasite of the Trout and Grayling. I. The Life History

Parasitology ◽  
1927 ◽  
Vol 19 (1) ◽  
pp. 86-99 ◽  
Author(s):  
F. J. Brown
Keyword(s):  
Life History ◽  
Gall Bladder ◽  
Excretory Vesicle ◽  
Intermediate Hosts ◽  
Larval Trematode ◽  
Sphaerium Corneum ◽  
Two Generations ◽  
History Of ◽  
Second Intermediate Host ◽  
Ephemera Danica

1. Crepidostomum farionis inhabits the gall bladder, as well as the intestine and pyloric caeca, of the trout and grayling.2. The life history of Crepidostomum farionis has been worked out and is based on the similarity of organisation of the cercaria, encysted larval trematode and the adult.3. The first intermediate hosts in the life history of this trematode are Pisidium amnicum (Müll.) and Sphaerium corneum (L.) though the latter is unusual.4. The second intermediate host is the larva of the mayfly, Ephemera danica (Müll.).5. There are two generations of rediae, the first gives rise to daughter rediae, which in turn produce cercariae.6. The rediae are characterised by the absence of ambulatory processes and a functional intestine.7. The cercaria (n.sp.) possesses “eye spots,” stylet and gland cells (salivary?), and the excretory vesicle is tube-shaped.8. The excretory system of the redia and the cercaria has been worked out in detail.9. The relation of the parasites to their respective hosts is discussed. On account of the need for further observations definite conclusions are held over for a later paper.

Taxonomic studies on Archigetes Leuckart, 1878 (Cestoda: Caryophyllaeidae)

Parasitology ◽  
1965 ◽  
Vol 55 (3) ◽  
pp. 439-451 ◽  
Author(s):  
C. R. Keneedy
Keyword(s):  
Life History ◽  
Experimental Work ◽  
Nature Conservancy ◽  
The Family ◽  
Single Genus ◽  
Biological Characters ◽  
Taxonomic Studies ◽  
Relationship Of ◽  
Recent Experimental Work ◽  
The Relationship

Recent experimental work has indicated that species of Archigetes are capable of infecting and maturing in fishes in addition to tubificids.The genus Archigetes is re-defined on the basis of morphological and biological characters, with particular emphasis on recent life history studies. All species capable of neotenic development have been re-united in a single genus.A description of all species of Archigetes together with a key for their identification are included. New synonomies are discussed.The relationship of Archigetes to other genera of the family is briefly considered, and it is concluded that it forms the terminal stage in a series showing the attainment of neotenic development.I wish to thank Professor R. J. Pumphrey in whose Department the work was carried out, and Dr J. C. Chubb for advice and help in the preparation of this manuscript. I am also grateful to Professor K. Berg and Dr R. L. Calentine for the loan of specimens. The work was carried out during the tenure of a Nature Conservancy Research Studentship.

scholarly journals Life history of Xenodexia ctenolepis: implications for life history evolution in the family Poeciliidae

2007 ◽  
Vol 92 (1) ◽  
pp. 77-85 ◽  
Author(s):  
DAVID REZNICK ◽  
TOMAS HRBEK ◽  
SUNNY CAURA ◽  
JAAP DE GREEF ◽  
DEREK ROFF
Keyword(s):  
Life History ◽  
Life History Evolution ◽  
The Family ◽  
History Of ◽  
History Evolution

Studies on the life history of Hymenolepis farciminosa (Goeze, 1782) (Cestoda: Hymenolepididae)

Parasitology ◽  
1962 ◽  
Vol 52 (3-4) ◽  
pp. 397-400
Author(s):  
S. C. Dutt ◽  
K. N. Mehra
Keyword(s):  
Life History ◽  
Zoological Survey ◽  
Research Centre ◽  
Intermediate Hosts ◽  
History Of ◽  
Adult Tapeworm

1. The life history of Hymenolepis farciminosa (Goeze), first reported in 1955, has been described.2. The grasshoppers Acrotylus humbertianus Sauss., Acrida exaltata Walk., Oedaleus abruptus Thunb., Crotogonus sp. and Aiolopus sp. were found, experimentally, to serve as intermediate hosts. The cysticercoid has been described and figured. A crow was experimentally infected with the cysticercoid and the adult tapeworm recovered.The authors wish to express their gratitude to Mr L. Sahai, M.Sc., M.R.C.V.S., the then Director of the Institute, for providing the requisite facilities, and to Dr H. D. Srivastava, M.Sc., D.Sc., F.N.I., Head of the Division of Parasitology, for valuable advice. They are grateful to Dr B. P. Uvarov, Director, Anti-Locust Research Centre, London, and to Dr A. P. Kapoor of the Zoological Survey of India for the identification of the insects.

Influence of tobacco Smoking on obstetric history of women during pregnancy

2020 ◽  
pp. 73-77
Author(s):  
A. Dzyubaylo ◽  
V. Lotkov
Keyword(s):  
Pregnant Women ◽  
Tobacco Smoking ◽  
Antenatal Clinic ◽  
Outpatient Clinics ◽  
The Family ◽  
History Of ◽  
Detection Of Smoking ◽  
Active Detection ◽  
Relationship Of ◽  
The Relationship

The article presents the results of the relationship of Smoking in women with a history of obstetric (OAA). The study is based on the results of a survey of 107 smokers and 136 non-Smoking women observed in the antenatal clinic for pregnancy. The study found an increase in the number of miscarriages and abortions in Smoking women compared to non-smokers. Detection of Smoking women of fertile age when attached to outpatient clinics, active detection of Smoking pregnant women, as well as Smoking relatives in the family, carrying out measures to reduce Smoking significantly reduce the likelihood of having children with chronic pathology.

Life History Studies on Trematodes of the Subfamily Reniferinae

Parasitology ◽  
1933 ◽  
Vol 25 (4) ◽  
pp. 518-545 ◽  
Author(s):  
S. Benton Talbot
Keyword(s):  
Life History ◽  
Life Cycle ◽  
Life Histories ◽  
Life Cycles ◽  
Small Fish ◽  
Intermediate Hosts ◽  
Natural Group ◽  
Remarkable Similarity ◽  
Physella Gyrina ◽  
Mother Sporocyst

1. The life histories of Lechriorchis primus Stafford, L. tygarti n.sp. and Caudorchis eurinus n.gen. et sp. have been experimentally completed in three hosts, the first complete life histories to be worked out for species of the subfamily Reniferinae.2. The definitive hosts of the three forms were found to be two species of garter snakes, Thamnophis sauritus and T. sirtalis.3. Three species of snails, Physella gyrina, P. parkeri, and P. ancillaria, have been found to serve as the first intermediate host in the life cycles of Lechriorchis primus and Caudorchis eurinus n.gen. et sp., and two species of snails, Physella gyrina and P. heterostropha, in the life cycle of Lechriorchis tygarti n.sp.4. The tadpoles of two species of frogs, Rana clamitans and R. pipiens, were found to serve as the second intermediate hosts in the life cycles of all three trematodes. The cercariae penetrate larvae of Triturus and small fish, but live only a short time in these animals.5. Every stage in the life history of Lechriorchis primus, including egg, miracidium, mother sporocyst, daughter sporocyst, cercaria, metacercaria, and developmental stages in the definitive host, has been described in detail.6. The mother sporocyst of forms having a stylet cercaria is described for the first time.7. The flame cell pattern of the cercariae of L. primus, L. tygarti n.sp., and Caudorchis eurinus n.gen. et sp. has been determined to be of the “2 × 6 × 3’ type. Also the adult stage of C. eurinus was determined to have the same type.8. It has been pointed out that the life histories of the members of the subfamily are uniform in that their life history stages display a remarkable similarity.9. It has been suggested that this uniform type of life cycle and remarkable similarity of larval stages offer the most logical basis for establishing the subfamily Reniferinae as a natural group.

A Contribution to the Life-history of a Gnathostome

Parasitology ◽  
1925 ◽  
Vol 17 (3) ◽  
pp. 237-244 ◽  
Author(s):  
Asa C. Chandler
Keyword(s):  
Life History ◽  
Intestinal Tract ◽  
The Body ◽  
Stomach Wall ◽  
Hollow Structures ◽  
Number Of Species ◽  
The Family ◽  
History Of

The family Gnathostomidae contains several genera and a fair number of species of nematodes of rather aberrant type and of uncertain affinities. As pointed out by Baylis and Lane (1920) in their excellent revision of the family, there is little doubt but that it should be included in the superfamily Spiruroidea. The subfamily Gnathostominae is characterised by the possession of a head bulb containing four closed membranous hollow structures, called ballonets by Baylis and Lane, connected posteriorly with four elongate sac-like structures designated cervical sacs. Three genera are recognised in this sub-family as follows: Tanqua, in which the head bulb is provided with transverse cuticular ridges, and Echinocephalus and Gnathostoma in which the head bulb is provided with rows of thorn-like spines. In Echinocephalus the body is smooth and destitute of cuticular spines, whereas in Gnathostoma all or a large part of the body has rows of cuticular spines on the posterior edges of the annulations. The first two genera are parasitic in the intestinal tract of cold-blooded vertebrates, whereas Gnathostoma apparently has its normal habitat in the stomach wall of mammals, as Baylis and Lane have pointed out.

Some Notes on Syringopais temperatella, Led., in Cyprus

1927 ◽  
Vol 17 (3) ◽  
pp. 313-314 ◽  
Author(s):  
D. S. Wilkinson
Keyword(s):  
Life History ◽  
Insect Pest ◽  
Early Summer ◽  
Cultural Methods ◽  
The Family ◽  
History Of ◽  
Major Pest ◽  
Hot Weather ◽  
Great Energy

It has just lately been reported to the writer that Syringopais (Nochelodes) temperatella, Led., a Microlepidopteron of the family Oecophoridae, has again in Cyprus begun to assume the rôle of a major pest. Little work seems to have been done on this insect anywhere, so that it may be worth while to give a few notes on one or two interesting points that have lately been brought to light with regard to it.On first appointment to the island, in 1923, the writer was given to understand that Nochelodes temperatella was the greatest insect pest with which the impoverished and struggling farmer had to deal ; but that this is indeed the whole truth was not entirely borne out by enquiries during the years 1924, 1925, and early 1926, for it was found that no serious endeavour to deal with the insect on the lines previously advocated by the Agricultural Department had ever been made, despite the fact that cultural methods only had been advocated, and in addition such as could easily have been carried out with the exercise of no great energy.Broadly, the life-history of the insect is as follows :—The adults are on the wing in the late spring or early summer, some little time before the wheat is cut. It is supposed that the eggs are laid in the soil—certainly they are to be found in the soil—and that they there persist through the hot weather, hatching some time during the winter, and the larvae immediately proceeding to attack the young wheat. The pest becomes really noticeable only towards the spring, when sometimes whole areas of wheat are virtually destroyed. Pupation takes place in the soil.

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