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World Health Organization : Report on a European Syposium Convened by the Regional Office for Europe, World Health Organization Division of Vector Biology and Control, No. 72.845: The Simullum Damnosum Complex in the Republic of Sierra Leone, with Special Emphasis on its Geographical Distribution and Relation to Onchocerciasis

By R. W. Crosskey

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Title: World Health Organization : Report on a European Syposium Convened by the Regional Office for Europe, World Health Organization Division of Vector Biology and Control, No. 72.845: The Simullum Damnosum Complex in the Republic of Sierra Leone, with Special Emphasis on its Geographical Distribution and Relation to Onchocerciasis  
Author: R. W. Crosskey
Volume:
Language: English
Subject: Health., Public health, Wellness programs
Collections: Medical Library Collection, World Health Collection
Historic
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Publisher: World Health Organization

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Crosskey, R. W. (n.d.). World Health Organization : Report on a European Syposium Convened by the Regional Office for Europe, World Health Organization Division of Vector Biology and Control, No. 72.845. Retrieved from http://worldebookfair.com/


Description
Medical Reference Publication

Excerpt
INTRODUCTION The scantiness of the l i t e r a t u r e on human onchocerciasis and its Simulium damnonum complex vectors in S i e r r a Leone conveys an impression t h a t the disease i s not generally recognized there as p r e s e n t i n g a n important health problem, or even t h a t it is not s p e c i a l l y prevalent in the country. The impression is f a l s e . I n r e a l i t y onchocerciasis i s one of the most omnipresent p a r a s i t i c diseases of S i e r r a Leone, which, t h o u g h r a t h e r n e g l e c t e d i n t h e p a s t , i s now beginning t o receive the a t t e n t i o n it deserves a s an unpleasant and d e b i l i t a t i n g i n f e c t i o n . The increased concern about the disease i s r e f l e c t e d in the extent to which nodulcctomy and banocide treatment a r e r o u t i n e l y p r a c t i s e d in h o s p i t a l s and c l i n i c s , and to wtiicll oncllocerciasis - by Lts vernacular name of ' r i v e r - b l i n d n e s s ' - has become known to thc Rcncral cornunity throughout S i e r r a Leone.

Table of Contents
CONTENTS 1. TNTRODUCTION . . . . . . . . . . . . . . . . . . . * * * . . . . . . 2 2 . 1lTSMRIC.U BACKGROUND . . . . . . . . 3 2 . 1 The period from 1900 t o 1970 . . . . . . . . . . . . . . .&7. -. .::. , ,:: . . . 3 2 . 2 Recent and c o n t i n u i n g i n v e s t i g a t i o n s . . . . 5 3 . GEOGRAPHICAL DISTRIBUTION OF SIMULIUM DAMNOSUM s. l . . . . 5 3 The general p i c t u r e of d i s t r i b u t i o n . . . . . . . . . . . . . . . . . . . . . . . 5 3.2 D i s t r i b u t i o n i n r e l a t i o n t o t h e r i v e r systems . . . . . . . . . . . . . . . . . . 7 3.3 D i s t r i b u t i o n i n r e l a t i o n t o v e g e t a t i o n zones . . . . . . . . . . . . . . . . . 9 4. IDENTITY AND DISTRXBDTION OF CYTOSPECIES OF THE S. DAMNOSUMC OMPLEX . . . . . . . . . 1 1 4.1 Evidence from enzyme e l e c t r o p h o r e s i s . . . . . . . . . . . . . . . . . . . . . . 11 4 . 2 Evidence from morphology of a d u l t females . . . . . . . . . . . . . . . . . . . . 11 4.3 The i d e n t i t y o f t h e cytospecies i n S i e r r a Leone . . . . . . . . . . . . . . . . . 12 4 . 4 D i s t r i b u t i o n o f t h e c y t o s p e c i e s i n S i e r r a Leone . . . . . . . . . . . . . . . . . 12 'I. VECTOR DISTRIBUTION IN RELATION n ONCHOCERCA VOLWLUS INFECTION . . . . . . . . . . . 13 5 . 1 Epidemiological i d e n t i t y of human o n c h o c e r c i a r i s . . . . . . . . . . . . . . . . 13 5.2 Review f o r Northern Province . . . . . . . . . . . . . . . . . . . . . . . . . . 14 . . . . . . . . . . . . . . . . . . . . . . . . . . @ 5.3 R e v i e w f o r E a s t e r n P r o v i n c e . 15 5.4 Review f o r Western Area and Southern Province . . . . . . . . . . . . . . . . . . 16 ACKNOWLEDGEMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 MAPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 ANNEX 1, L i s t of l o c a l i t i e s at which t h e Simulium damnosum complex h a s been found i n S i e r r a Leone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 ANNEX 2. Wing-tuft colour of a d u l t female specimens of Simulium damnosum Srom S i e r r a Leone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ANNEX 3. L i s t o f t h e s p e c i e s o f Slmuliidae known i n S i e r r a Leone . . . . . . . . . . . . 2 9 ANNEX h. C o l l e c t i o n s o f Simuliidae made i n S i e r r a Leone by R. W. Crosskey and R. J. Post. L i s t of c o l l e c t i o n s i t e s and of s p e c i e s i d e n t i f i e d i n t h e m a t e r i a l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

 

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