Teoria conform careia vinovat de “explozia” focarelor de gripa aviara din Romania ar fi un import masiv de pasari vii din Ungaria si Slovacia a pus pe jar autoritatile. Specialistii in medicina veterinara consultati de Libertatea sunt de parere ca aceasta ipoteza e greu de crezut.
Pentru veterinari, raportul SRI ridica numeroase semne de intrebare. Cea mai mare “dilema” e legata de perioada lunga de timp dintre momentul importului (ianuarie) si izbucnirea epidemiei (mai). Conform specialistilor Organizatiei Mondiale a Sanatatii, virusul H5N1, cunoscut ca fiind “inalt patogen”, are o perioada de incubatie de 5-6 zile. Este extrem de contagios si ucide rapid pasarile infectate, rata de mortalitate fiind de aproape 100%. In plus, chiar tinand cont de faptul ca virusul poate rezista, in apa, circa 30 de zile, la temperaturi de 0 grade, intre momentul importului si cel al “exploziei” focarelor de gripa aviara au trecut peste trei luni.
“Libertatea” a cerut parerea unor specialisti in medicina veterinara, care sa lamureasca toate aceste contradictii. “Sunt foarte multe elemente pe care inca nu le avem. Aceasta teorie poate sta in picioare doar in anumite conditii”, ne-a explicat prof. univ. dr. Doina Danes, sefa catedrei Stiinte Clinice din cadrul Facultatii de Medicina Veterinara Bucuresti. Care sunt aceste conditii?
“Supozitia este valabila doar daca acei pui importati au provenit din „mamici” vaccinate contra virusului H5N1. In aceste conditii, puii primesc o zestre de anticorpi care ii protejeaza fata de imbolnavire. Pasarile vaccinate devin rezistente, insa in sensul ca nu fac forma clinica a bolii, nu prezinta nici un fel de simptome. Daca acesti pui au avut anticorpi de la „mamici”, nu inseamna ca nu puteau transmite boala. E cunoscut faptul ca pasarile vaccinate se pot infecta cu tulpina patogena, fara a se imbolnavi, dar o pot multiplica si elimina prin excremente. Acesta este unul dintre inconvenientele majore, de ordin epidemiologic, care fac ca vaccinarea sa fie adoptata numai ca ultima solutie si in conditii de control absolut al efectivelor vaccinate”, ne-a explicat prof. Danes.
Teoria conform careia pasarile-mame ar fi fost vaccinate contra gripei aviare ridica insa alte uriase controverse. Si asta pentru ca e interzisa vaccinare pasarilor. “Fenomenul ar avea o conotatie internationala greu de estimat, un scandal imens in toata Uniunea Europeana, daca s-ar dovedi ca pasarile de reproductie, adica “parintii” puilor care au fost importati la noi, au fost vaccinate. Utilizarea vaccinarii a fost aprobata de Comisia UE numai in Italia, Olanda si in Franta, pentru anumite efective de pasari, in asociere cu masuri de individualizare si monitorizare stricta a acestora si cu restrictii la comercializarea lor si a produselor obtinute”, a adaugat specialistul.
Si decanul Facultatii de Medicina Veterinara, prof. univ. dr. Victor Crivineanu e de parere ca povestea cu importurile “nu creeaza un scenariu plauzibil”. “Teoretic, daca vinovate ar fi fost aceste importuri din luna ianuarie, ar fi trebuit sa vorbim mult mai repede despre aparitia cazurilor de imbolnaviri”, ne-a spus prof. Crivineanu.
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