Conjunctivita este o inflamatie a conjunctivei, membrana tip mucoasa, transparenta, care acopera fata interna a pleoapelor (conjunctiva tarsala) si care captuseste o parte a globului ocular (conjunctiva bulbara).
La caine si pisica, conjunctivita este o afectiune foarte frecventa, fiind favorizata de diversi factori, de la cei de rasa pana la cei climatici. In general, conjunctivitele sunt benigne, fiind de origine infectioasa, virala, parazitara sau alergica. Este foarte importanta diferentierea conjunctivitelor de alte afectiuni asemanatoare, pentru abordarea unei terapii economice si eficiente.
Cel mai important lucru este sa stabilim cauza inflamatiei. Conjunctivitele pot aparea la animalele de orice varsta, sex sau rasa. Informatiile pe care le puteti oferi medicului veterinar despre imprejurarile in care a aparut afectiunea sunt foarte importante. Astfel, trebuie stabilita situatia vaccinarilor, eventualul contact cu alte animale, periodicitatea cu care apar conjunctivitele (cronice sau sezoniere), factorii de mediu care pot influenta aparitia acestor afectiuni.
Cele mai frecvente conjunctivite sunt cele infectioase, produse de bacterii cum ar fi stafilococul si streptococul. Acestea pot fi fie cauza primara, fie asociate cu alte afectiuni, nu neaparat oculare.
In conditiile in care cainii dv. sunt plimbati in zone murdare sau zone populate de animale fara stapan, contaminate, riscurile sunt ridicate, iar pentru a le diminua, pe langa evitarea unor astfel de locuri si este bine sa apelati la o igiena zilnica aplicata animalului dv. si la consultul medical periodic.
Conjunctivitele au adesea cauza virala, cel mai intalnit caz fiind jigodia (Maladia CarrĂŠ), afectiune in care conjunctivita mucopurulenta este specifica.
Conjunctivitele parazitare se intalnesc frecvent la animalele cu o intretinere foarte proasta, cea mai frecventa fiind conjunctivita consecutiva parazitarii cu Demodex (demodecie).
Nu sunt de neglijat nici conjunctivitele alergice, care au luat mare amploare in ultimii ani, pe fondul scaderii imunitatii organismelor. Alergenii sunt prezenti peste tot, iar depistarea lor este ceva mai greoaie in cadrul activitatii medicale curente.
Foarte numeroase sunt conjunctivitele iritante, produse de substante chimice, praf sau vant, mai ales la animalele care traiesc in exterior, suportand conditii climatice variate. Conjunctivitele pot aparea secundar prin iritatii mecanice, produse de anomalii ale pleoapelor, cum ar fi ectropion (rularea pleoapei spre exterior), entropion (rularea pleoapei spre interior), formatiuni neoplazice, anomalii ale implantarii firelor de par etc.
Asa cum spuneam, conjunctivitele sunt in marea lor majoritate benigne, dar pot genera procese neoplazice prin factori iritanti, care actioneaza in mod continuu.
Tratamentul conjunctivitelor primare se aplica in functie de natura lor, iar cele secundare, cum ar fi cazul jigodiei, care nu au o terapie specifica, sunt abordate in functie de infectiile bacteriene asociate.
Cele mai uzitate antibiotice in cazul conjunctivitelor infectioase sunt cloramfenicolul, framycina (soframicin), neomicina, tetraciclina si polimixina.
Nu exista nici o ratiune in asocierea antibioticului cu corticosteroizi in tratarea conjunctivitelor bacteriene. Corticosteroizii sunt eficienti in conjunctivitele alergice, in asociere cu identificarea si evitarea contactului cu alergenii responsabili.
In general, afectiunile oftalmologice sunt multiple si complexe, abordarea lor facandu-se pe elementele componente ale analizatorului vizual.
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