1
)
22litters from farms
withgood hygienic
conditions. The weanedpiglets ( 4 6 killed)
harbouredon an average 13
parasites.
Thehighest
levels were 97, 95.8 3 ,
60, 34 or 28 worms.2
)
8 littersfrom farms
with bad or mediocrelcygienic
conditions. Thepiglets ( 1 6 killed)
har-boured on an average 729
parasites.
Thehighest
levels were g 5+5, 1 733, 1 572, 1 377, 612 or 532 worms.In the sows, the «
peri parturient
egg rise describedby
other authors was not confirmed.Piglets
should beprevented
from worm intake(i) by parasitic
sterilization of the sows beforefarrowing ( 2
treatments at ydays interval)
and( 2 ) by carefully applying
thehygienic
rules inthe pens where
piglets
are fed with their mothers.«Rearing
is and canonly
behygiene
in action x(LECLAINCIIE).
Cytochrome P 450 induction by DDT in the pig
and concomitent reduction of retinol
R.
FERRANDO,
R. TRUHAUTJ.-C.
GAK, ClaudeGRAILLOT,
Claudine FOURLON
Laboratoire de Recherches de la Chaire de Nutrition et
A li 11l entation, Ecole
nationale vétérinaired’Alfort,
7,
avenue dts Général de Gaulle, 94îOlilIaisons-.41fo!,t
Piglets receiving
a dietcontaining
250 p.p.m. of DDT exhibited alarge
increase incytochroi»<:
P .150 in all their liver lobes. This reduction was