The present study was conducted to investigate the pathogeneicity of Newcastle Disease Virus (NDV) genotype VII.1.1 "NDV-CHICKEN-EGY-ALEX-NRC-2020" strain in combination with Infectious Bursal Disease Virus (IBDV) "IBDV/Egypt/Qalubia/17" and/or some commercial immunostimulants (Lector ® and Orego ® ) in commercial broiler chickens. The pathogenicity studies parameters included the effects on protection, growth performance and clinico-pathological changes. The results indicated that, immunostimulants can keep maternal immunity longer where lector ® was the best; the decline in HI titers also indicates that bird groups not contract ND natural infection. The results of performance parameters after immunostimulants administration and challenged with IBDV at 14-days of age and NDV GenotypeVII.1.1 at 21-days of age in broiler chickens proved that administration of Lector ® and Orego ® solution had positive effect on average body weight gain and feed conversion rates than control non medicated groups; where the Lector medicated groups showed higher rates of average weight followed by Orego ® medicated groups. Regarding signs and mortality in infected groups IBD signs varied from mild in lector ® , moderate in Orego ® while sever signs were in non-medicated group. The mortalities began at 5 th day post-challenge (pch) in non-medicated groups with total 10-20%; while the mortalities in NDV began at 3 rd day pch in group non-medicated with 50% to reach 100% mortality rate in 7 th pch. At necropsy both IBD and NDV infection lesions were found in dead birds of all challenged groups. Chicken groups challenged by IBDV or NDV after treatment with Lector showed milder histopathological changes than Orego solution and non-treated groups showed the most sever lesions. Chicken groups challenged with both virulent IBDV and NDV either treatment with Lector ® or Orego ® solution or non-treated showed no marked difference in histopathological lesions. The results of total and differential leucocytes indicated that lector had a great high effect in WBCs levels specially lymphocytes and monocytes. In conclusion the used immunostimulants are of low value against IBD and ND virulent viruses challenge. In conclusion, is recommended to apply a strict hygienic measures and suitable vaccination programmes to protect chickens against both IBD and NDV infection as the current control and prevention regimes, including vaccines and vaccination protocol are not adequate against either single or mixed infection infections with IBD and/or ND.

Background: Emojis are icons that are familiar and fun to add pizzazz and colour to communication. They have also been used in authentication where the emojis form memorable pictogram story-like passwords. Emojis, which are graphical, are in general vulnerable to shoulder surfing attacks (SSAs). This paper studies whether graphics such as emojis offer better memorability than numerics when implemented in a shoulder-surfing resistant authentication method. Thus, the proposed method aims to meet both needs of being shoulder-surfing resistant as well as being memorable. Methods: In this paper, a SSA resistant method (DragPIN) is used as a reference system on which to implement emojis in place of numerics. Additionally, a new feature, cue questions was implemented for added security. In the proposed method, users composed emoji-based stories using personalised cue questions that served as memory aids. Moreover, these self-chosen cue questions were less comprehensible to shoulder-surfing observers. There were two variants of the DragPIN method, manual and automatic-sliding. To compare the differences, both the reference configuration and modified versions based on the proposed method were implemented. Thirty people participated in user testing. A pre- and post-survey appraised user experience. User testing and survey on both methods and their variants for performance, memorability, and usability were performed. Results: All implementations successfully resisted shoulder surfing. The time taken for login in the manual variant using the proposed methodology was shorter than using the reference method. After four to six weeks, login performance taking into account intermediate failures was better for the proposed method (86.7-91.7%) than the reference method (76.7-78.3%). Hypothesis testing also showed significance in the results. This could point to higher memorability in the proposed method. Conclusion: The study provides testing of emoji-based compared to PIN-based implementation in authentication. Emoji-based stories may form memorable passwords while personalised cue questions may aid memorability.

Background and Aim: Respiratory viral infections have a considerable detrimental impact on animal welfare as well as significant financial ramifications in the poultry industry. Avian influenza virus (AIV) subtypes H5 and H9, Newcastle disease (ND), and infectious bronchitis (IB) are the most economically significant illnesses impacting the poultry sector worldwide, including Egypt. From January to October 2022, this study examined the presence of respiratory viral infections (AI-H5, AI-H9, ND, and IB) in 359 flocks of broiler chickens (33–38 days) in six Egyptian governorates (Beheira, Gharbia, Giza, Monufiya and Qalyoubia). Results Out of 359 flocks examined, 293 tested positive, whereas 66 tested fully negative for the four viruses tested with the highest positive results in Beheira. Out of 293 positive flocks, 211 were positive to a single virus with Beheira having the highest rate, followed by Qalyoubia, Giza, and Monufiya. NDV was found to be the highest across all governorates, followed by IBV, AI-H9, and AI-H5. Double infection was detected in 73 flocks with either H9 or ND or both H9 and IB would co-infect one another. The most common viral co-infection was H9 + IB, ND + IB, and ND + H9. Giza had the greatest prevalence of co-infection with ND + H9, H9 + IB, and ND + IB in the governorates, followed by Monufiya and El Buhyera. Only 6 out of 359 flocks were tribally infected with ND + H9 + IB in three governorates: Giza, Monufiya, and Beheira. According to the number of flocks and the month of the year, July had the fewest tested flocks (23) and both September and October had the most (48 flocks). The positive flocks were highest in October and lowest in January. Conclusion The results revealed that IBV and H9 as a single or a mixed infection had a great role in the respiratory infection in broiler. The used vaccine (regardless their origin and type) is not able to protect broiler chickens from developing infection and shedding of virus to the poultry environment. Therefore, poultry vaccines need regular evaluation, renovation in face infective field virus mutants and also, poultry farms must be adopting more biosecurity measures.

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