SUMMARYExperiments were carried out with Sw albino mice and it was concluded that the percutaneous route via abdominal skin was significatively more efficient than tail immersion method and subcutaneous infection; the subcutaneous injection was significatively more efficient than the percutaneous infection through the tail; this latter and the intraperitoneal injection, resulted in similar infections, but were significatively less efficient than the others. Significative difference was also observed in the comparison between the subcutaneous route and percutaneous infection through ear pinna. The influence of the site of skin infection by percutaneous route was also discussed.
E n tr e ju lh o /1 9 7 2 e n o v e m b r o /1973, tiv e r a m p ro sse g u im e n to in v estig a çõ e s r e la cio nadas ao p ro b le m a ãa esq u isto sso m o se m a n sô n ic a n o L a g o d a P a m p u lh a , B elo H o rizo n te , M G (B r a sil), p a r tic u la r m e n te so b re o p a p e l ep id em io ló g ico dosA (D eSm areH , 1818), N ecto m y s sq u a m ip e s sq u a m ip e s (B r a n ts , 1827) e Z ygo d o n to m y s la s iu ru s (L u n d , 1841)
tra v é s d e e x a m e s de fe z e s e de víscera s (fíg a d o e in te s tin o ) ve rifico u -se que 10,9% (20) dos e sp é c im e n s ca p tu ra d o s a b rig a v a m ovos e v e r m e s a d u lto s de S c h isto so m a m a n so n i. A p e n a s 3 espécies e n c o n tr a v a m -s e p a ra sita d a s: H oloc h ilu s b ra silie n s is
co n c h a d a s a p e n a s 0,4% (70) r e v e la ra m -se p o s itiv a s p a ra p la n o rb ín eo s, se n d o ca p tu ra d o s 64 e x e m p la r e s de B io m p h a la ria g la b r a ta (S a y , 1818) e 35 de B. ten a g o p h ila (d 'O rbigny, 1835), todos n e g a tiv o s p a ra cercá ria s d e S. m a n so n i. O e n c o n tro de roedores p a ra sita d o s d ecorreria da elim in a çã o d e cercá ria s p o r p la n o rb ín e o s e x is te n te s n o s córregos trib u tá r io s e va la s a eles a d ja c e n te s. As larva s do tre m a tó d e o , leva d a s p ela c o rre n te za , a tin g ir ia m os roedores n o "d o m ín io v ita l" a d s tr ito ao lago. A tr a v é s de m e c a n ism o a n á logo, os u su á rio s do lago p o d erã o se in fe c ta r , m a lg ra d o a p e r m a n e n te v ig ilâ n c ia d a s a u to rid a d es s a n itá ria s locais, que p a tr o c in a m estu d o s d e s tin a d o s à recu p era çã o d a q u ele local. A d m ite m , fin a lm e n te , os A A . que o p a p e l dos roedores n a ep id em io lo g ia da e sq u isto sso m o se va ria rá , se m p re , de u m a área p a ra o u tra , seg u n d o c a r a c te r ís tic a s d e ca d a ec o ssistem a en vo lvid o .
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