XXVI.—The Fresh-water Mollusca of the Tanganyika Territory and Zanzibar Protectorate, and their Relation to Human Schistosomiasis

1939 ◽  
Vol 59 (3) ◽  
pp. 687-744 ◽  
Author(s):  
Alan Mozley
Keyword(s):  
Fresh Water ◽  
Human Blood ◽  
Tropical Medicine ◽  
Biological Study ◽  
London School ◽  
Intermediate Hosts ◽  
Blood Flukes ◽  
Human Schistosomiasis ◽  
Molluscan Fauna

During a part of the years 1937 and 1938 a biological study of the fresh-water mollusca of the Tanganyika Territory and Zanzibar Protectorate was carried out with the aid of the grant of the Wandsworth Scholarship of the London School of Hygiene and Tropical Medicine. Up to the present little has been known about the molluscs of this part of Africa, although the importance of certain members of this group as the intermediate hosts of human blood flukes (Schistosoma spp.) has been widely recognized. The following account of the constitution and distribution of the molluscan fauna of this region may therefore be of interest and value.

scholarly journals Cercarial Dermatitis in Schleswig-Holstein Distribution of Cercariae in Public Swimming Lakes

2021 ◽  
Vol 2 (11) ◽  
pp. 1148-1153
Author(s):  
Frauke Elbnik ◽  
Regina Folster-Holst
Keyword(s):  
Spatial Distribution ◽  
Allergic Reaction ◽  
Fresh Water ◽  
Larval Stage ◽  
Water Samples ◽  
Intermediate Hosts ◽  
Time Saving ◽  
Cercarial Dermatitis ◽  
Blood Flukes ◽  
Northern State

Cercarial dermatitis is a neglected zoonotic disease with distribution all over the world’s temperate zones. It is caused by cercariae, a larval stage of parasitic blood flukes of the genus Trichobilharzia that is a parasite of waterfowl. When cercariae burry into human skin, they trigger an allergic reaction that leads to severely itching papules. Goal of this research was to get an overview over the distribution of cercariae in the bathing places of Schleswig-Holstein, the most northern state of Germany. Therefore, all public bathing places were visited and searched for fresh water snails that are the potential intermediate hosts of cercariae. Water snails of different families and genera were collected and examined for the presence of cercariae. Water samples were taken and examined for cercariae via a microscope. Additionally slime samples of the water snails were taken to test a new, time saving method of detection. In total 8 different kinds of water snails were collected and examined, of which the families of Lymnaeidae and Planorbidae proved to be the most common hosts of cercariae. In total, the results indicate a spatial distribution of cercariae shedding snails all over Schleswig-Holstein.

On a Collection of Parasitic Worms from East Africa

1932 ◽  
Vol 10 (4) ◽  
pp. 209-230 ◽  
Author(s):  
S. Gladstone Solomon
Keyword(s):  
East Africa ◽  
Major Part ◽  
Tropical Medicine ◽  
London School ◽  
Research Station ◽  
Veterinary Services ◽  
The Third ◽  
Veterinary Research ◽  
Parasitic Worms

The following material was sent to the Department of Helminthology of the London School of Hygiene and Tropical Medicine in three groups; two lots coming from Mr. Aneurin Lewis, of the Veterinary Research Station at Kabete, Kenya Colony, and the third lot from the Director of Veterinary Services, Uganda. For this latter, the writer is indebted to the Imperial Bureau of Agricultural Parasitology. The major part of the material was placed at his disposal by Professor R. T. Leiper, F.R.S., to whom he wishes to express his sincere thanks.

Transnationalism in Missionary Medicine

2017 ◽  
Vol 30 (1-2) ◽  
pp. 30-43
Author(s):  
Margo S. Gewurtz
Keyword(s):  
Formative Period ◽  
Tropical Medicine ◽  
Sand Fly ◽  
London School ◽  
The North ◽  
Kala Azar ◽  
Indian Medical ◽  
Medical Missionaries ◽  
The Subject ◽  
Missionary Medicine

Kala-azar is a parasitic disease that was endemic in India, parts of Africa and China. During the first half of the twentieth century, developing means of treatment and identification of the host and transmission vectors for this deadly disease would be the subject of transnational research and controversy. In the formative period for this research, two Canadian Medical missionaries, Drs. Jean Dow and Ernest Struthers, pioneered work on Kala-azar in the North Henan Mission. The great international prestige of the London School of Tropical Medicine and the Indian Medical Service would stand against recognition of the clinical discoveries of missionary doctors in remote North Henan. It was only after Struthers forged personal relations with Dr. Lionel. E. Napier and his colleagues at the Calcutta School of Tropical Medicine that there was a meeting of minds to promote the hypothesis that the sand fly was the transmission vector.

scholarly journals On a new Cestode parasite of an East African Rock Rabbit (Procavia sp.)

1924 ◽  
Vol 2 (2) ◽  
pp. 77-80
Author(s):  
Jean G. Baer
Keyword(s):  
Tropical Medicine ◽  
London School ◽  
East African ◽  
Cestode Parasite

Being engaged on a complete revision of the genus Inermicapsifer Janicki (1910), we had occasion to examine some material from the Helminthological Department of the London School of Tropical Medicine. This material was kindly placed at our disposal by Prof. R. T. Leiper, F.R.S., to whom we here tender our sincerest thanks. We are also indebted to Prof. O. Fuhrmann for his useful advice and criticisms.

scholarly journals Some new West African species of Anopheles (sensu lato), with notes on nomenclature

1911 ◽  
Vol 2 (2) ◽  
pp. 141-143 ◽  
Author(s):  
F. W. Edwards
Keyword(s):  
New Species ◽  
Natural History ◽  
West Africa ◽  
West African ◽  
Tropical Medicine ◽  
London School ◽  
African Species ◽  
New West

In describing the following new species from West Africa, some words of explanation are needed as to the generic names used. In the first place, it is necessary to say that the writer follows Messrs. Dyar and Knab in considering that most of the genera into which Meigen's genus Anopheles has recently been split up are not genera in any accepted sense, and should sink under the old name Anopheles. Provisionally, however, Stethomyia, Chagasia, Calvertina and Bironella are considered as distinct; as none of these genera are African, this will not affect the present paper. Lieut.-Col. A. Alcock, of the London School of Tropical Medicine, has kindly allowed me to see the manuscript of a paper on the classification of Anopheles, which he is about to publish in the Annals and Magazine of Natural History, and I have been able to concur entirely with his views; he recognises only five sub-genera of Anopheles, the sub-genus Nyssorhynchus including all those species with flat scales on thorax and abdomen, i.e., the genera Nyssorhynchus, Cellia and Neocellia of Theobald's Monograph.

scholarly journals Diseases of Gastropoda

2022 ◽  
Vol 12 ◽  
Author(s):  
Michelle F. O’Brien ◽  
Sarah Pellett
Keyword(s):  
Fresh Water ◽  
Food Source ◽  
Negative Impact ◽  
Animal Health ◽  
Etiological Agent ◽  
Human Consumption ◽  
Intermediate Hosts ◽  
The World ◽  
Herpesvirus 1 ◽  
World Organisation

Gastropods (class Gastropoda) form the largest of the classes in the phylum Mollusca and inhabit terrestrial, fresh water and marine environments. A large number of these species are of major conservation importance and are an essential component of ecosystems. Gastropods may be deemed as pests, having a negative impact in horticulture and agriculture, whereas others may be used as a food source for human consumption and therefore are beneficial. Gastropods are susceptible to primary diseases and also act as intermediate hosts for diseases which affect other animals, including humans. The diseases described include two that are notifiable to the World Organisation for Animal Health (OIE): Xenohaliotis californiensis and Abalone viral ganglioneuritis caused by Haliotid herpesvirus-1 (HaHV-1). Research into the diseases of gastropods has often focused on those species that act as intermediate disease hosts, those that are used in research or those cultured for food. In this paper we review the viral, bacterial, fungal, parasitic and miscellaneous conditions that have been reported in gastropods and mention some of the factors that appear to predispose them to disease. The pathogenicity of a number of these conditions has not been fully ascertained and more research is needed into specifying both the etiological agent and significance in some of the diseases reported.

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