Ciclul vital
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Documentul descrie ciclul vital al viermilor aduli, care triesc 樽n intestinul subire al gazdei i au o reproducere prolific prin depunerea a p但n la 200.000 de ou pe zi. Oule, odat ce devin embrionate, pot contamina solul i apa, fiind ingerate de oameni sau animale, iar larvele rezultate invadeaz mucoasa intestinal, ulterior ajung但nd 樽n ficat i plm但ni. Procesul ciclic se finalizeaz cu dezvoltarea viermilor aduli 樽n intestinul subire, relu但ndu-se astfel ciclul infestrii.
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仂从仄亠仆 仗亠亟舒于仍磳 仂弍仂亶 从仂仆仂仍仆 舒弍仂 仗仂 仂仆仂于舒仄 亞亠仆亠亳从亳, 于从仍ﾑ舒ﾑ 于仂仗仂 仂 亰舒从仂仆仂仄亠仆仂 仆舒仍亠亟仂于舒仆亳, 舒从亳 从舒从 亰舒从仂仆 亟仂仄亳仆亳仂于舒仆亳 亳 仗舒于亳仍舒 丼舒亞舒舒. 舒弍仂 于从仍ﾑ舒ﾑ 舒亰仍亳仆亠 亳仗 从亠亳于舒仆亳亶, 亞亠仆仂亳仗 亳 亠仆仂亳仗 仂亞舒仆亳亰仄仂于, 舒 舒从亢亠 亰舒亟舒仆亳 仆舒 亳仆亠仗亠舒亳 仂亟仂仍仂于仆仂亶 亳 亞亠仆亠亳亠从亳 于亠仂仆仂亠亶. 丐亠从 仆舒仗舒于仍亠仆 仆舒 仗仂于亠从 仗仂仆亳仄舒仆亳 仂仆仂于仆 亞亠仆亠亳亠从亳 仗亳仆亳仗仂于 亳 亠仄亳仆仂仍仂亞亳亳.Ad
Ciclul vital
- 1. Ciclul vital Viermii adul i triesc 樽n lumenul intestinului sub ire al gazdei. Femela depune aici numeroase ou (aproximativ 200.000/zi). n absen a masculului, femela depune ou nefecundate, care nu au capacitate infestant. Oule rezultate din 樽nmul irea sexuat con in o singur celul ou, nedivizat (sunt unicelulare, neembrionate). Au un 樽nveli protector rezistent. Sunt eliminate 樽nmediu odat cu excrementele gazdei. Sunt foarte rezistente 樽n mediul extern, put但nd rm但ne viabile pe sol mai mult de 1 an. Nu sunt infestante dac sunt ingerate 樽n stadiul de ou neembrionate. Atunci c但nd 樽nt但lnesc condi ii favorabile (sol umed, umbrit, temperatur ambiental de 22-24 属C), celula ou pe care o con in 樽ncepe s se divid, i oule devin embrionate i infestante 樽ntr-un interval care poate varia de la 18 zile la 3 sptm但ni. Oule embrionate contamineaz solul, apa i plantele cu care au venit 樽n contact. Ele pot fi 樽nghi ite de om sau animale odat cu acestea (prin consum de ap contaminat, fructe i legume nesplate, m但ini murdare, geofagie). Ajunse 樽n intestinul sub ire, oule embrionate eclozeaz, eliber但nd larve care invadeaz mucoasa intestinal i ajung, pe calea circula iei portale i limfatice, 樽n ficat. Aici sufer un prim ciclu larvar de matura ie, cu durata de 4 zile. Apoi, pe calea circula iei sistemice, ajung 樽n plm但ni. Urmeaz un nou ciclu larvar de matura ie, cu o durat de 10-14 zile, dup care larvele strbat peretele alveolar i urc prin arborele traheobron ic p但n 樽n faringe, de unde sunt 樽nghi ite. Ajung但nd din nou 樽n intestinul sub ire, din larve se dezvolt viermii adul i, i ciclul se reia.
- 2. Cuprins 1.Ascaridele.Caracteristica generala 2.Ciclul evoluativ si modul de transmitere 3.Ascaridioza.Generalitati 4.Ascaridioza.Simptome 5.Diagnostic si profilaxia 6.Reguli de evitarea si prevenire a bolii 7.Tratament