thesis of mappiing of Rift Valley Fever by osman shiine farah 2011

7/30/2019 thesis of mappiing of Rift Valley Fever by osman shiine farah 2011

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Mapping of Rift valley fever risk areas in

Somaliland

Thesis

STVS

BY: Osman Abdulahi FarahRoll number: STVS/0087

Supervisor Dr. Ismail kan


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introduction

Rift Valley fever (RVF) is a per acute or acute disease

of domestic animals in Africa and Madagascar, caused

by a mosquito- borne virus and characterized hepatitis

and haemorrhagic state, but infection are frequently in

apparent or mild, RVF affect sheep, goat, cattle camel,

Wild ruminants, buffaloes and human.


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introduction

RVF is a member of the phlebovirus of the Family

Bunyaviriadae. It is spread by the bite of infected

mosquitoes, typically the Aedes or Culex genera.

The mode of RVF virus transmission may be vector-

borne, or from direct contact with body fluids of infectedanimals.

Signs of disease is anorexia, photophobia weakness and

excessive salivation, but Human, comma, muscle pain,

ocular discharge


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General and Specific

Objectives

The general objectives of this mini thesis is to show

areas of risk of rift valley fever in Somaliland

Specific is To indicate high risk areas in Somaliland

regions by using ArcGIS software.

To indicate prevalence of surveyed four regions


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Table 1: Structure of the different administrative levelsof sampling

Included in

the above

administrat

ive level

Region District Location Sites

Total

4

12

30

900

Mode Nill 164 30 313Average 225 75 30 331Range 198 134 5 38

Material and Methods


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Table 2: List of relevant variables included in the database

along with the number of observations available

Variable Number of samples for

which it was recorded

% of samples for which it

was recorded

LocalizationRegion 900 100%

District 900 100%

Location 900 100%

Site 900 100%

Species

Goat 456 51%

Sheep 444 49%

Age 1-5

Sex

Male 356 40%



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Data Collection

The input of data was obtained from SAHSP office in

Hargeisa, where relevant information was expected to

be available Data Management and Analysis

Data from SAHSP were managed and entered into

databases by using ArcGIS version 9.3.1 due to short

time of study. For the statistical analysis the softwareStata IC/11Also were used data input of excel

Microsoft.


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Administrative structure of

Somaliland The Somaliland administrative structure has

frequently been subject to Modification, to

this serological study of mapping RVF thereare 4 regions composed of (12) districts.

Each region composed 30 locations and out of

this four districts were collected 900 samples.


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RESULTS

Regions

Number of samples

collected in each region and

% of the whole survey

Prevalence with 95%

Confidence Intervals

Hargeisa 60 (7%) 0.15 (0.05-0.25)

Sanaag 318 (35%) 0.116352201 (0.11-0.15)

Sool 270 (30%) 0.1858185185 (0.18-0.25)

Togdheer 252 (28%) 0.107142827 (0.10-0.14)

Total 900 0.1367 (0.13-0.15)


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RESULTS

Map 5 shows Somaliland Rift Valley Risk Areas


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RESULTS

Map3 shows Rift Valley Risk sites serological status


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DISCUSSION

the study has shown that the sool(0.18.5) and

Maroodi jeex(0.15) are the highest risk areas of

rift Valley fever disease compared to other

regions such as Sanaag(0.11.6) and

Togdheer(0.10.7) with CI respectively,


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DISCUSSION

prevalence of RVF in four surveyed regions inSomaliland with their interval confidence respectively,shows that Sool 0.18%, (0.18-0.25,

Hargiesa 0.15%(0.05-0.25) Sanaag 0.11.6% (0.11-0.15),Togdheer 0.10.%(0.10-0.14),


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CONCLUSION This study was aimed at producing by mapping risk

areas of RVF disease in Somaliland regions, so that itcan help to improve the management and control ofRVF vector in those four regions, although the

environment drivers that determine the life cycle of thevector with high risks as result of this study of mappingusing arcGIS, like Sool, Sanaag and Togdheer regions.


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Recommendation

Based on finding of this study of mapping risk areas

four of Somaliland regions, following

recommendations were given as follows

Ministry of livestock and local NGOs should developthe capacity to use ArcGIS technologies for the

effective identification ecological of mosquito born

diseasein those regions.

Those four regions were at risk to RVF, so insecticidesshould be provided to avoid human.


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thesis of mappiing of Rift Valley Fever by osman shiine farah 2011

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