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From

Dr.

G. De Sole

Chief

EPI

our ref.

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Your ^ref.

-4

MEMORANDUM

To The Programne

Dlrector

Attention

Date 04l1-l l86

Subject ^REPORT 0F THE MISSION

IN

GOREBA SOMUII AREA

AND THE KULPAWN .'IIVER Originator

Bqckground

During

the

1985/86 working season

the

EPf

Unit

has detected

2

vilI-ages Pendid and Goreba Somun, whe,re transmission has occured

since the start of

the Programme.

fn July

1986

the

Pendi6 area was

investigated using a fast

^assessment

methodology based on

the

survey

of children

born

after the start of the

^prograrnme described

in the report of the

Pendi6

mission.

The

fast

assessment methodology used

ln the

Pendi6 survey proved

reliable

and

quantitative, but its sensitivity

appeared

to

be

limited to first

and second

line. villages located in a

5

kn radius

from a

productive breedlng

site.

^We used

a slightly

modified

version of the fast

^assessment

methodology, enhancing,

its efficiency, to

study

the

area around

the village of

Gorebe Somum and

to investigate _the

Kulpewn

river

where

the

EPI

evaluation

network was considered

insufficient

anc'

the results of the

entomological

evaluation

not always

satisfactory.

ob ectlves

1 To assess

the

geogra[,hical

in the

Kuldas basin arounc'l

limits of the

area where transmission has reLapsed

the vlllage of

Goreba Sonum.

11 To

locate the

source

of

transmission

if

coming from breeding

site

on the Kulda

rivers of the

corresponding

stretch of the

l,Ihite vo1ta.

lii.

To

investigate _the

_occurence

of

transmisslon along

the

Kul-pawn

river.

Results and Discusslon

Folloting the indicatlons of

the' Perrdid study onLy

fir'st line villages

and

children 3 to

11 years

of

age were

selected. fn

one and haLf day

a

team

of 3

people succeeded

in

examining 1064

children for a total of

14

villages.

The maximum out.put was achieved

the first

day

with

750

children

examined

in

11

villages.

When comparlng

this yield with that of

simple

(1

_day

per village)

and

detall (3

days

per

viLLage)

evaluation routinely

used by ^OCP

the potential of this

methodology

ie

evident.

High

efficiency translate in

low

cost

^(see

table 1)

and

the possibility to investigate all

areas

with unclear

resuLts.

Goreba Somum

fn the

area surrounding

the village of

Goreba Somum

a total of

10 vil-lages were

investigated'5

_on

_the

_White

Volta river

anc' 5 on

the tributaries of the

^same

river,

see Map

1.

0n1-y

a 4

year

old child

was found

infected in the village of I{eni

on

the l{hite Volta. This

ease may be due

to migration or

tranemisslon

further East.

The absence

of infectlon in the

remaining 590

children

examined

in this

area

lndicate that the

transmisslon

is ltmlted to the vlllage of

Goreba Somum and

originate In the

breeding

site

on

the

Kulda

1 river that

has

not

been

treated for

vears

. _Rnr

^l

^4,,

^,t-

t'

2

Kulpawn

Two

villages

were surveyed

in the

North Kulpawn

river

basin and

2 in the

same

river

lower

course.

No

infected children

rsere found

in 2

northern

vll1ages

^(see Map

2),

^whereas

in the

south

stretch of the

Kulpawn (see _{Map 3)}

l'2 out of

81

children

^(L5%) were found

infected ln the village of

Bielikpong on

a positlve

breeding

site

and an 11 year o1-d

girl in

Ghantala. The

latter

one may wel-l have been

infected before the starting of the

Progranme. The age

distribution of the positive

cases

are

reported

in

tabt-e

2.

The presence

of 7 infected children

between

the

age

of 9

and

6

el-iminate nisjudgement

of

p8e as

a

source

of error in the final

conclusion

that

transmission has occured

in this

viLLage.

Conclusion

Transmission has occured

in the

Kulda

rivers

area and

the

^Kulparn

rlver but is limited to 2 viIlages,

^{Goreba Somum} and Bielikpong.

The breeding

sites

on

the

Kulda

1 are the

source

of the

transmission detected

in the village of

Goreba Somum.

The

finding of the

survey

in

Pendi6

area,

Goreba Somum area and the Kulpawn

river

and

the finding in

^Nakong and

Bui indicate that in

the

treated

areas

of central

OCP transmission remairs

limited to flrst line villages

located on

top of the

breeding

site

and

that the interland

remainsprotected from onchocerciasis even

in the

presence

of flies.

ce:

- Chief

^VCU

- Dr.

Baldry

- ^Dr.

^WaLsh

- Dr.

^Reme

- Dr.

Zerbo

1

2

3

I

,1,

{f

TabLe 1

Cost

of

Personnel

for the evaluation of 6 villages using 3 different

methods

Detail

Single

Rapid

People

11 6 2

Man/Day 220

72 6

Z Expenditure

100 33 3

Cost

1 , 549 ,000 504 ,0oo 42,000 Day

20 L2 3

Assuming an average

cost of

^CFA7000

per

person

per

day.

Table 2

*

Btelikpong No. infected

AGE DISTRIBUTION OF INFECTED CHILDREN AI\ID

THEIR INTENSITY OF INFECTION

10-11 8-9 6-7 4-5

5 ^(9)*

3

⁽⁷⁾

4

⁽¹⁰⁾

0

I{eni Gbantala

No.

infected

No. lnfected

1(7)

(2)

0 0 0 0

0 0 1

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