Isifo saseNewcastle

1 Uhlolojikelele

Isifo iNewcastle, esaziwa nangokuthi i-Asian chicken plague, yisifo esiyingozi, esithathelwanayo futhi esiyingozi esithathelwanayo sezinkukhu namaturkey esibangelwa i-paramyxovirus.

Izici zokuxilonga zomtholampilo: ukucindezeleka, ukuphelelwa isifiso sokudla, ukuphefumula kanzima, indle eluhlaza, kanye nezimpawu zesistimu.

I-pathological anatomy: ubomvu, ukuvuvukala, ukopha, kanye ne-necrosis ye-mucosa yokugaya ukudla.

2. Izici ze-Etiological

(1) Izimfanelo nezigaba

I-Chicken Newcastle disease virus (NDV) iyingxenye yohlobo lwe-Paramyxovirus emndenini i-Paramyxoviridae.

(2) Ifomu

Izinhlayiya zegciwane ezivuthiwe ziyindilinga, ezinobubanzi obungu-100 ~ 300nm.

(3) I-Hemagglutination

I-NDV iqukethe i-hemagglutinin, ehlanganisa amaseli abomvu egazi lomuntu, inkukhu, negundane.

(4) Izingxenye ezikhona

Uketshezi lomzimba, uketshezi, nokuphuma kwezicubu nezitho zezinkukhu kuqukethe amagciwane. Phakathi kwazo, ubuchopho, ubende, namaphaphu aqukethe inani eliphakeme kakhulu lamagciwane, futhi ahlala emongweni wamathambo isikhathi eside kakhulu.

(5) Ukwanda

Igciwane linganda emgodini we-chorioallantoic wemibungu yenkukhu enezinsuku ezingu-9-11 ubudala, futhi ingakhula futhi izalane kuma-chicken embryo fibroblasts futhi ikhiqize i-cell fission.

(6) Ukumelana

Ayisebenzi emizuzwini engu-30 ngaphansi kokukhanya kwelanga.

Ukusinda ku-greenhouse isonto elingu-1

Izinga lokushisa: 56°C imizuzu engu-30–90

Ukusinda ku-4℃ unyaka ongu-1

Ukusinda ku -20 ° C iminyaka engaphezu kweyishumi

Ukugxila okujwayelekile kwezibulala-magciwane ezivamile kubulala i-NDV ngokushesha.

3. Izici ze-Epidemiological

(1) Izilwane ezithintekayo

Izinkukhu, amajuba, amaphiasant, ama-turkeys, amaphigogo, ama-partridges, izigwaca, izinyoni zasemanzini, amahansi

I-Conjunctivitis ivela kubantu ngemva kokutheleleka.

(2) Umthombo wokutheleleka

Izinkukhu ezithwala amagciwane

(3) Iziteshi zokudlulisa

Izifo zomgudu wokuphefumula kanye nomgudu wokugaya ukudla, indle, ukudla okunegciwane, amanzi okuphuza, inhlabathi, namathuluzi angena emgudwini wokugaya ukudla; uthuli oluthwala amagciwane kanye namaconsi angena emgudwini wokuphefumula.

(4) Iphethini yezehlakalo

Kwenzeka unyaka wonke, ikakhulukazi ebusika nasentwasahlobo. Izinga lokugula kanye nokufa kwezinkukhu ezisencane ziphezulu kunezinkukhu ezindala.