Background: RNA interference (RNAi) has recently introduced as a powerful technique for specific gene silencing in antiviral therapy controlling shrimp diseases. The present study was conducted to assess the effect of dsRNA VP15-WSSV vaccine by oral administration on tiger survival rate and response immunes. Methods: A encoding VP15 isolated from infected WSSV cloned into L4440 vector with T7 p...

Ozonated oil has a long tradition in medical therapy. Here, the results from previous studies regarding antibacterial effects of ozonated oils were compared. In addition, aim this study was to further examine activity against Escherichia coli for two different oils, regard ozone exposure time and amount. Using agar dilution, minimum inhibitory concentration studied. For all tested concentration...

Mukteswar strain of Newcastle disease (ND) virus was propagated in 9-day-old embryonated eggs via allantoic route. The harvested allantoic fluid with haemagglutination (HA) titre of 1024 (EID50 10) was inactivated using 0.1 percent formalin solution. Two experimental vaccines were prepared in light mineral oil with aqueous to oil ratio of 1:2 ( MK-VAC-I) and 1:4(MK-VAC-II).The hydrophile lipoph...

Newcastle Disease is still endemic in Pakistan’s poultry industry and responsible for great economic losses and high mortalities. Avian Influenza Virus has been involved in production losses in past few years, with or without the association of Newcastle Disease in the field. Therefore, present study was planned to evaluate the cross protection between Avian Influenza Virus and Newcastle Diseas...

A study has been carried out for determining of cross-immunity between Massachusetts (Mass) M41 and Iranian IR/773/2001 (793/B) strains of infectious bronchitis virus. Two groups of 20 three weeks old SPF chickens vaccinated subcutaneously with two oil-emulsions inactivated Infectious Bronchitis Vaccines (Mass M41 and Iranian IR/773/2001 strains) that had been manufactured in Razi institute in ...

Vaccines consisting of subunit or inactivated bacteria/virus and potent adjuvants are widely used to control and prevent infectious diseases. Because inactivated and subunit antigens are often less antigenic than live microbes, a growing need exists for the development of new and improved vaccine adjuvants that can elicit rapid and long-lasting immunity. Here we describe the development and cha...

The adjuvanticity of a sulfolipopolysaccharide (SLP) incorporated into a squalane-in-water emulsion (SLP/S/W) was compared with that of a mineral oil-in-water (O/W) adjuvant currently used in commercial porcine vaccines. Groups of pigs were immunized twice with vaccines comprising either inactivated influenza virus (iFlu3 containing strains A/Swine, MRC-11 and X-79), inactivated pseudorabies vi...

to prepare hemagglutination inhibition (hi) antigen the egg drop syndrome virus (edsv) was propagated in 10-day-old embryonated duck eggs. the virus antigen was inactivated with two methods including heating (65°c) and adding 0.5% formaldehyde by considering low destroying effect on hemagglutination (ha) and hi titers. the edsv hi titers of 310 sera and 100 yolks obtained from 23 chicken farms ...