Karakterizacija terenskih izolata virusa zarazne bolesti Fabricijeve burze u Jordanu uporabom molekularnih metoda - kratko priopćenje.

The reverse transcriptase-polymerase chain reaction/restriction fragment length polymorphism (RTPCR/ RFLP) and RT-PCR specific primer to detect very virulent (vv) strains of infectious bursal disease virus (IBDV) were used for identification and characterization of Jordanian field isolates of IBDV that caused severe outbreaks. In this study, 80 bursa of fabricius samples were used from 20 commercial broiler chicken flocks in Jordan with clinical symptoms of IBDV. The RT-PCR/RFLP was conducted on a 743-bp fragment of the VP2 gene with the restriction enzymes BstNI and MboI. The results indicate the existence of IBDV field strains in Jordan. In addition, 60% of IBDV Jordanian isolates had unique RFLP patterns different from those previously published elsewhere. However, 20% of local IBDV strains were positive on using a specific primer for vvIBDV and had a unique RFLP pattern that differed from the Jordanian IBDV isolate and those previously published elsewhere.Lančana reakcija polimerazom uz prethodnu reverznu transkripciju/polimorfizam dužine restrikcijskih fragmenata (RT PCR/RFLP) i RT-PCR specifične početnice za jako virulentne sojeve virusa zarazne bolesti Fabricijeve burze (ZBFB) bile su rabljene za identifikaciju i karakterizaciju jordanskih terenskih izolata toga virusa koji su uzrokovali teški oblik bolesti. Za istraživanje je bilo rabljeno 80 uzoraka tkiva Fabricijeve burze uzetih iz 20 komercijalnih jata tovnih pilića u Jordanu u kojih su ustanovljeni klinički znakovi ZBFB a. RT-PCR/ RFLP proveden je na odsječku gena VP2 od 743-bp s restrikcijskim enzimima BstNI i MboI. Rezultati upućuju na postojanje terenskih sojeva virusa ZBFB-a od kojih je 60% izolata imalo jedinstveni RFLP obrazac različit od onoga već objavljenog drugdje. Ipak, 20% lokalnih sojeva virusa bilo je pozitivno uporabom specifične početnice za jako virulentni virus i imalo je jedinstveni obrazac RFLP različit u jordanskih izolata u odnosu na izolate objavljene drugdje

Islam di Simpang Jalan

77.;21 C

Simultaneous detection of astrovirus, rotavirus, reovirus and adenovirus type I in broiler chicken flocks

Enteric diseases cause substantial economic losses to the poultry industry. Astroviruses, rotaviruses, reoviruses, and adenovirus type 1 have been reported as a significant cause of intestinal symptoms in poultry. In the present study, intestinal samples from 70 commercial broiler chicken flocks were examined for the presence of astroviruses, rotavirus, and reovirus by reverse transcription-polymerase chain reaction, and for the presence of group I adenovirus by polymerase chain reaction. Astroviruses were identified in 38.6% of samples tested. Both avian nephritis virus and chicken astrovirus were identified in the astrovirus positive flocks, where 74.1% of these flocks were positive for only one type of astrovirus, whereas, 25.9% of these flocks were positive for both types of astrovirus. Reoviruses, rotaviruses, and adenoviruses were identified in 21.4, 18.6, and 14.3% of these flocks, respectively. Concomitant infection with two or more viruses in the same flock were also prominent, where 5.7, 5.7, 2.9, 2.9, 1.4, and 1.4% of these flocks were positive with both astrovirus and rotavirus; astrovirus and adenovirus; astrovirus and reovirus; rotavirus and adenovirus; rotavirus and reovirus; and reovirus and adenovirus respectively. Moreover, 4.3 and 2.7% of these flocks were positive for astrovirus, reovirus, and adenovirus; and astrovirus, reovirus, and rotavirus, respectively. Further studies will focus on identifying specific viral factors or subtypes/subgroups associated with disease through pathogenesis studies, economic losses caused by infections and co-infections of these pathogens, and the costs and benefits of countermeasures