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Tarantule RO mania :: Vezi subiect - Anopheles gambiae
Tarantule RO mania
http://www.tarantule-romania.ro/forum/

Anopheles gambiae
http://www.tarantule-romania.ro/forum/viewtopic.php?f=22&t=2040
Pagina 1 din 1

Autor:  Leonidas91 [ 24 Iun 2011, 10:38 ]
Subiectul mesajului:  Anopheles gambiae



Genul Anopheles are cel putin 7 specii reprezentative imperceptibile din punct de vedere morfologic, acest gen a fost recunoscut in anii 1960 si include speciile vectoare ale malariei. Desi nu sunt diferentiati morfologic, tantarii din genul Anopheles se pot identifica prin criterii comportamentale. Unele specii sunt antrofofile (paraziteaza omul) , pe cand altele paraziteaza exclusiv animalele.
Au fost descoperiti 75 de receptori de mirosuri in antenele tantarilor, responsabili pentru fuga tantarilor atunci cand simt substantele respingatoare. Dar cercetatorii nu au putut afla cum tantarul simte mirosurile caracteristice oamenilor precum amoniacul, butylamina sau acidul lactic.
Cei 50 de receptori descoperiti acum sunt cei care detecteaza mirosul oamenilor, iar oamenii de stiinta incearca acum sa inteleaga mai bine sistemul olfactiv al acestor insecte si sa afle cum stiu ei sa deosebeasca oamenii de vaci sau ratoni. Cel mai probabil, spun cercetatorii, concentratiile de mirosuri sunt cele care le permit tantarilor sa isi aleaga tinta.
Femela de genul Anopheles, inclusiv A. gambiae, e un vector principal de transmitere a parazitului malariei, Plasmodium falciparum, care este responsabil pentru moartea a mai mult de un milion de oameni anual. Aceasta specie paraziteaza exclusiv omul si se presupune ca este atrasa de mirosul de picioare murdare.

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