scholarly journals Natural transmission of Trypanosomiasis (T. pecorum group) in the absence of Tsetse-fly

1917 ◽  
Vol 8 (1) ◽  
pp. 35-41 ◽  
Author(s):  
Rupert W. Jack
Keyword(s):  
Tsetse Fly ◽  
Blood Sucking ◽  
Domestic Stock

The opinion that trypanosomiasis of the T. pecorum type is, under favourable conditions, transmissible amongst domestic stock through the agency of blood-sucking flies other than Glossina has been expressed by several observers.

scholarly journals Surface Sialic Acids Taken from the Host Allow Trypanosome Survival in Tsetse Fly Vectors

2004 ◽  
Vol 199 (10) ◽  
pp. 1445-1450 ◽  
Author(s):  
Kisaburo Nagamune ◽  
Alvaro Acosta-Serrano ◽  
Haruki Uemura ◽  
Reto Brun ◽  
Christina Kunz-Renggli ◽  
...  
Keyword(s):  
Salivary Gland ◽  
Trypanosoma Brucei ◽  
Sialic Acids ◽  
Sleeping Sickness ◽  
Tsetse Fly ◽  
Mammalian Host ◽  
Tsetse Flies ◽  
African Trypanosome ◽  
Blood Sucking

The African trypanosome Trypanosoma brucei, which causes sleeping sickness in humans and Nagana disease in livestock, is spread via blood-sucking Tsetse flies. In the fly's intestine, the trypanosomes survive digestive and trypanocidal environments, proliferate, and translocate into the salivary gland, where they become infectious to the next mammalian host. Here, we show that for successful survival in Tsetse flies, the trypanosomes use trans-sialidase to transfer sialic acids that they cannot synthesize from host's glycoconjugates to the glycosylphosphatidylinositols (GPIs), which are abundantly expressed on their surface. Trypanosomes lacking sialic acids due to a defective generation of GPI-anchored trans-sialidase could not survive in the intestine, but regained the ability to survive when sialylated by means of soluble trans-sialidase. Thus, surface sialic acids appear to protect the parasites from the digestive and trypanocidal environments in the midgut of Tsetse flies.

scholarly journals Game and Tsetse Fly in Southern Rhodesia

Oryx ◽  
1956 ◽  
Vol 3 (5) ◽  
pp. 259-265
Keyword(s):  
Nineteenth Century ◽  
Sleeping Sickness ◽  
Tsetse Fly ◽  
Tsetse Flies ◽  
Blood Sucking ◽  
Southern Rhodesia

Until nearly the end of the nineteenth century about two-thirds of Southern Rhodesia was uninhabitable by domestic cattle, and thus, to a great extent, unusable by mankind whether European or native, because of the disease trypanosomiasis. In man this is called sleeping sickness, in cattle nagana. It is caused by trypanosomes, minute organisms which live in the blood of the victims of the disease. These trypanosomes are sucked up, with the blood of the infected man or beast, by blood-sucking tsetse flies, develop in the fly and may be transmitted to the next creature on which the fly feeds.

scholarly journals Explaining the Host-Finding Behavior of Blood-Sucking Insects: Computerized Simulation of the Effects of Habitat Geometry on Tsetse Fly Movement

2014 ◽  
Vol 8 (6) ◽  
pp. e2901 ◽  
Author(s):  
Glyn A. Vale ◽  
John W. Hargrove ◽  
Philippe Solano ◽  
Fabrice Courtin ◽  
Jean-Baptiste Rayaisse ◽  
...  
Keyword(s):  
Host Finding ◽  
Tsetse Fly ◽  
Blood Sucking ◽  
Computerized Simulation ◽  
Host Finding Behavior

scholarly journals Molecular screening for Anaplasmataceae in ticks and tsetse flies from Ethiopia

2016 ◽  
Vol 64 (1) ◽  
pp. 65-70 ◽  
Author(s):  
Sándor Hornok ◽  
Getachew Abichu ◽  
Nóra Takács ◽  
Miklós Gyuranecz ◽  
Róbert Farkas ◽  
...  
Keyword(s):  
Glossina Pallidipes ◽  
Tsetse Fly ◽  
Ixodid Ticks ◽  
Sub Saharan Africa ◽  
Tsetse Flies ◽  
Ehrlichia Ruminantium ◽  
Blood Sucking ◽  
Sub Saharan ◽  
Transmission Studies ◽  
First Time

Hard ticks and tsetse flies are regarded as the most important vectors of disease agents in Sub-Saharan Africa. With the aim of screening these blood-sucking arthropods for vector-borne pathogens belonging to the family Anaplasmataceae in South-Western Ethiopia, four species of tsetse flies (collected by traps) and seven species of ixodid ticks (removed from cattle) were molecularly analysed. DNA was extracted from 296 individual ticks and from 162 individuals or pools of tsetse flies. Besides known vector–pathogen associations, in Amblyomma cohaerens ticks sequences of Anaplasma marginale and A. phagocytophilum were detected, the latter for the first time in any ticks from cattle in Africa. In addition, part of the gltA gene of Ehrlichia ruminantium was successfully amplified from tsetse flies (Glossina pallidipes). First-time identification of sequences of the above pathogens in certain tick or tsetse fly species may serve as the basis of further epidemiological and transmission studies.

A new Tsetse-fly of the Glossina palpalis Group occurring in Belgian Congo

1929 ◽  
Vol 20 (1) ◽  
pp. 1-4 ◽  
Author(s):  
E. E. Austen
Keyword(s):  
Tsetse Fly ◽  
Blood Sucking ◽  
Small Collection ◽  
Fourth Species ◽  
Belgian Congo ◽  
Glossina Palpalis

In the autumn of 1928 Dr. J. Schwetz forwarded to the writer, from Stanleyville, a small collection of blood-sucking Diptera, the majority of which had been obtained by him in the region of the Lower Lomami River. The material sent included specimens of four species of Glossina, the determination of three of which (G. palpalis, Rob.-Desv., G. fusca, Walk., and G. tabaniformis, Westw.) presented no difficulty. The fourth species, however, which had evidently attracted the special attention of the sender, since specimens of it were received labelled “ ? G. pallicera,” proves to be new and is accordingly described below. Dr. Schwetz, who is already well known by reason of entomological investigations in Belgian Congo extending over a long series of years, is to be congratulated upon a discovery which brings the number of recognised species of Glossina up to twenty.

MONITORING STUDIES OF ARBOVIRUS INFECTIONS TRANSMITTED BY MOSQUITOES ON THE TERRITORY OF THE VOLGOGRAD REGION

2019 ◽  
pp. 60-66
Author(s):  
E.V. Molchanova ◽  
D.N. Luchinin ◽  
A.O. Negodenko ◽  
D.R. Prilepskaya ◽  
N.V. Boroday ◽  
...  
Keyword(s):  
Virus Antigen ◽  
Elisa Test ◽  
Serum Samples ◽  
Blood Sucking ◽  
Tick Borne Encephalitis ◽  
Volgograd Region ◽  
Two Samples ◽  
Probable Presence ◽  
California Serogroup ◽  
Tick Borne Encephalitis Virus

The paper presents data from the monitoring studies’ results of arbovirus infections transmitted by mosquitoes in the Volgograd region. West Nile virus antigen (WNV) in 9 samples, Tahyna virus in one sample, Batai virus in two samples were detected in the study of 110 samples of field material (blood-sucking mosquitoes) by ELISA test. Antibodies to WNV in 16.58 percent of the samples, to tick-borne encephalitis virus in 1.08 percent, to viruses of the California serogroup and Ukuniemi in 1.09 percent, to the virus Sindbis in 2.17 percent were detected as a result of the study of blood serum samples from donors in the Volgograd region. Thus, we obtained data on the probable presence of the Batai, Sindbis, Ukuniemi and Californian serogroup viruses along with the circulation of WNV on the territory of the Volgograd region.

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