Revista da Sociedade Brasileira de Medicina Tropical
26(1):41, jan-m ar, 1993
COMUNICAÇÃO
LIGHT EFFECT ON FEEDING OF FIRST INSTAR
DIPETALOGASTER MAXIMUS
IN XENODIAGNOSIS
M.N.A. Menezes, M .T.A. Garcia-Zapata, C.N. Castro, V.A. Soares and P.D. Marsden
O b s e r v a tio n s o f o u r la b o r a to r y c o lo n y o f
Dipetalogaster maximus
o v e r a p e r io d o f te n y e a rs su g g e s t th a t a s m a lle r q u a n tity o f b lo o d is b e in g in g e ste d b y h u n g r y f ir s t in s ta r b u g s 1 3 . S in c e in M e x ic o th e m a jo r ity o f b u g s a r e f ir s t in s ta r o f d iu m a l h a b it it w a s s u g g e s te d th a t fe e d in g m ig h t b e re la te d to li g h t in te n s ity 2. T h e T a b le 1 sh o w s th a t in f iv e o f s ix e x p e r im e n ts w h e r e lo ts o f 1 0 0 lst in s ta rD. maximus
w e r e fe d in th e d a r k a n d in d a y lig h t c o n d itio n s ; th e la tte r f a v o u r e d b lo o d in g e s tio n . O b s e r v a tio n f iv e s u g g e s ts th a t a n o th e r a m b ie n ta l f a c to r is o p e r a tin g a lth o u g h te m p e r a tu r e a n d h u m id ity c o n d itio n s w e r e p a r tia lly c o n tr o lle d . T h e se r e s u lts s u g g e s t th a t f o r o p tim a l x e n o d ia g n o s is re s u lts w ith m a x im a l f e e d in g l 8t in s ta rD. maximus
s h o u ld b e a llo w e d to fe e d in th e lig h t.Table 1 - Effect o f light on the fe e d o f l st instar
D ip e t a lo g a s te r m a x im u s
(mean weight in
milligrams before and afier feeding).
L o t
L ig h t D a r k
b e f o r e a f te r b e f o r e a f te r
1 7 :5 4 1 .5 7 .8 2 4 .4
2 7 .9 4 6 .5 8 .0 2 6 .8
3 7 .5 4 7 .9 7 .3 2 8 .9
4 7 .4 4 2 .7 7 .4 2 3 .8
5 7 .5 5 3 .6 7 .4 5 8 .8
6 7 .4 4 7 .3 8 .2 2 2 .5
M e a n 7 .6 4 6 .6 7 .7 3 0 .9
R E F E R E N C E S 1. B a r r e to A C , P r a ta A , M a r s d e n P D , C u b a C C ,
T r i g u e ir o C P . A s p e c to s b io ló g ic o s e c r ia ç ã o e m m a s s a d e
Dipetalogaster maximus
( U h le r , 1 8 9 4 ) ( T r ia to m in a e ) . R e v is ta d o In stitu to d e M e d ic in a T r o p i c a l d e S ã o P a u lo 2 3 :1 8 - 2 7 , 1 9 8 1 .2 . M a r s d e n P D , C u b a C C , A lv a r e n g a N J , B a r r e to A C . R e p o r t o f a fie ld c o lle c tio n o f
Dipetalogaster
maximus
( U h l e r , 1 8 9 4 ) . R e v is ta d o In stitu to d eM e d ic in a T r o p i c a l d e S ã o P a u lo 2 1 :2 0 2 - 2 0 6 , 1 9 7 9 . 3 . S o a r e s V A , T o r n o C a f a s s o O , G a r c i a - Z a p a t a M T ,
M a r s d e n P D . B io lo g ic a l a s p e c ts o f
Dipetalogaster
maximus
a f te r p r o lo n g e d l a b o r a to r y c u ltiv a tio n . I. E c lo s io n tim e , fe r tili ty o f e g g s a n d t h e f ir s t n y m p h a l fe e d a f te r e c lo s io n . M e m ó r i a s d o I n s titu to O s w a ld o C r u z 8 1 ( s u p p l) : 1 6 4 - 1 6 5 , 1 9 8 6 .N ú c le o d e M e d i c i n a T r o p ic a l e N u t r i ç ã o d a U n iv e r s id a d e d e
B r a sília , B r a s ília , D F , B r a s il.
