The opportunity to work at the Maison Carree prison oame through the .
gocxl offioas of Dr. l&no&i Sex-gent, the Mreotor of the Pasteur Institute. The first
viait to the prison ms mde on July 23rdt with Dr Beguet , who had previously carried
out tests of different types of vaocine at the prison.

       All work and observations on louse powder herewith reported have been
done by one or more of the group (Dr. ?&&ok, of the Pasteur Institute; Drs. Davis,
Markharrr, Riehl and Soper, of the Rookefeller Foundation) assisted by inmates of the
prison working under alose direct supervision.

Propewdering louse infestation.

        Munination of the alothing of 158 prisoners to asoertain the percent-
age of prisoners with lioe and to detexmine roughly the degree of infestation was
made from July 28th to July 29th. 108 of the examinations made were in Hard I. where
&use powders were to be tested and 58 were in '8ard Ii where no powder was to be ap-
plied* These latter oases were expeoted to serve as controls against the possibility
,of a seasonal reduation of louse incidence being attributed to the use of the inseot-
ioides.

Prepowdering louse counts. July 26 to 29.

Over 9 lice

with over 9 lice

$nseatio&dsa ueedr

       Two inseotioides have been tested, one manufactured in the U.S.A.
(Inaeoticide &I) and the other pre
aM.lable diluentla (InseoCioLie Q P ared here with imported ingredients and looally
                                     .

      Ward 11 was chosen to test the eff'icienoy of insauticides on a community
in v&&oh everyone in the community was treated and oontact with untreated persons
was reduoed to a minimum.

       The group of 108 men whose clothes had been examined to establish the
degree of ingestation were divided into three groups t Group 1. to be treated with
Inseotioide G.and to be retreated whenwer post treatment examinations should indicate
that it is neoessaryi Group 2. to be treated with Inseotioide M and to be retreated
arter an interval of one week; Group 3. to be treated with Insecticide Ls end to be
retreated when indioated by post treatment indication.

       All other persons sleeping in Ward 1. were placed in Group 4. to be treat-
ed with Inssotiaide tl as often as naaessary to prevent this group beooming a source
of reinfestation for the study Groups, 1,2 and 3-


2.

   Plans were mde to apply inseotioide SIta the garments of all new prisoners
a.aing to Ward 1. and to those returning to the Ward after a stay hn the prison
infirmmy.

    So far is is kmmn, the only persons to esuape the initial .!usting of
group 4. wee8 three of the prisoners , who assist the guards in the administration
of the ward and 15 men who work in the bakery. The assistant <guards were dusted
3 days, the bakers 13 days after the first -iusting of group 4. This failure to
dust all of group 4. is propably of little importsme since these 18 men all enjoy
speoial privileges, are much claaner than the oomrnon run of prisoners and have
separate quarters.

Bppliortion of inseotioides.

     The inssotiaides were applied by dusting from cylinGrica1 tins vlrith a
row of perforations about the base. Powder wm shaken along the seams on the inner
aurfaoes of the olothing and on both sides of the blankets used by the prisoners.
The removal of clothing is a tine consuming operation even in prison where the
natural reluctame to disrobe can be readily overcome. To avoid this delay and to
facilitate the a pliaation
one insecticide P G)     of pcszder to the clothing of women, tests were made with
          of portable blower of the type oomnonly used in applying powder
inaectioides to foot! plants. The initial applications gave surprisingly good distrib-
                                                                           - _ __

ution of powder on the inner surfacres of the clothing dusted in situ.

.

fhEting
  1.

Dusting
  2.

Pys
bstwf3en
Duratings

3roup 1.

fnseot-
iaide C

Aug. 3



Aug.20





17

Zroup 1

Inseci

aug. 3



lulg.10





  7

2


i..









c

#Group 3.

.oide M.

Group 4. Inseofioide %.

hug.17
Aug.19 Aug.17 ;+I$.24

---. ..-._I-

Patients
from
Infirmary

Aug.13

Aug.23

10

Louse oounts before and after dusting.

.

I

  NBIT
prisoners

    Counts of lioe whioh could be found on the clothing of Groups 1, 2 and 3
were made at intervals after the first @-eatment and after the second treatment
of group 2. The results indiaate that t 1. Insoaticide G is a sluw sating poison
with little or no ovicidal power but with a persisting killing power which takes
care of most of the young lice whioh hatoh out from eggs in the clothing at the
time of application of the insecticide; 2mInsectioide M isarapitlly killing powder
whose action is not so complete nor persistant as is that of Insecticide G.


Prisomra w$th 13.09

1  15umbsr of lit~ found

I 3!reatiamat i 36 ! 35   26

-- .

--_ ~. ..-.    

17 days af%er
1st Traatment, 36  61 0' 32 1

I___ . _.. ,

0 3-! 16'    2

      I

113 '

0. 34 I l2       06 10
   l.l,> ,:

Betreated on

14th day
  -_

       I  / I-j
0, / j 1)  4 '1:8: 0
                           i

0.0; 2'281 2,

   The oontrols in Vkrd 2 were oountod 13 days after the first examination
and mm found to have suffered no apparent reduotion in lousiness.

   The first emunination of 50 prisoners in Jard 2 revealed 49 Infestations
of which 39 had 10 or more lice oaoh; 13 days later oxeminstion of 4S of these
revealed 48 inferstations of which 44 were of 10 or spore lice each,