Read by QxMD icon Read


Frederik T Larsen, Bertrand Bed'Hom, Mohammad Naghizadeh, Rikke B Kjærup, Siamak Zohari, Tina S Dalgaard
Vaccination programs are implemented in poultry farms to limit outbreaks and spread of infectious bronchitis virus (IBV), which is a substantial economic burden in the poultry industry. Immune correlates, used to predict vaccine efficacy, have proved difficult to find for IBV-vaccine-induced protection. To find correlates of IBV-vaccine-induced protection, hence, we employed a flow cytometric assay to quantify peripheral leucocyte subsets and expression of cell surface markers of six different non-vaccinated and vaccinated Major Histocompatibility Complex (MHC) haplotypes...
February 11, 2019: Developmental and Comparative Immunology
Ana Marandino, Ariel Vagnozzi, María Isabel Craig, Gonzalo Tomás, Claudia Techera, Yanina Panzera, Federico Vera, Ruben Pérez
Infectious bronchitis virus (IBV) is a persistent sanitary problem for the South American poultry industry despite extensive vaccination. The IBV single-stranded RNA genome has high rates of mutation and recombination that generate a notorious virus variability. Since most IBV vaccines are type-specific, there is a need for a constant surveillance of the circulating lineages and knowledge about their genetic and antigenic properties. Here we present an integrative analysis that provides the pattern of genetic variation of the South American IBV strains and information about their antigenic characteristics...
February 14, 2019: Avian Pathology: Journal of the W.V.P.A
Hassanein H Abozeid, Anandan Paldurai, Berin P Varghese, Sunil K Khattar, Manal A Afifi, Sahar Zouelfakkar, Ayman H El-Deeb, Magdy F El-Kady, Siba K Samal
Infectious bronchitis virus (IBV) causes a major disease problem for the poultry industry worldwide. The currently used live-attenuated vaccines have the tendency to mutate and/or recombine with circulating field strains resulting in the emergence of vaccine-derived variant viruses. In order to circumvent these issues, and to develop a vaccine that is more relevant to Egypt and its neighboring countries, a recombinant avirulent Newcastle disease virus (rNDV) strain LaSota was constructed to express the codon-optimized S glycoprotein of the Egyptian IBV variant strain IBV/Ck/EG/CU/4/2014 belonging to GI-23 lineage, that is prevalent in Egypt and in the Middle East...
February 11, 2019: Veterinary Research
Gunsup Lee, Hoonsung Choi, Shanmugam Sureshkumar, Sun Keun Jung, Jeom Sun Kim, Keon Bong Oh, Kyung-Woon Kim, Hyeon Yang, Dong-Hoon Kim, Sung June Byun
Infectious bronchitis (IB) generated by the infectious bronchitis virus (IBV) causes economic difficulties for livestock farmers. The 3D8 single chain variable fragment (scFv) protein is a recombinant antibody with nuclease activity that shows antiviral effects against various DNA and RNA viruses in mice and chickens. In this experiment, 3D8 scFv G2 transgenic chickens produced by crossing 3D8 scFv G1 transgenic rooster and wild type hens were screened by genomic PCR and immunohistochemistry analysis. 3D8 scFv transgenic chickens, wild type sibling chickens, and SPF chickens were directly infected with IBV (5 chickens per group) and indirectly infected by airborne propagation (15 chickens per group)...
January 23, 2019: Research in Veterinary Science
Emily J Aston, Brian J Jordan, Susan M Williams, Maricarmen García, Mark W Jackwood
Avian respiratory disease causes significant economic losses in commercial poultry. Because of the need to protect long-lived poultry against respiratory tract pathogens from an early age, vaccination programs for pullets typically involve serial administration of a variety of vaccines, including infectious bronchitis virus (IBV), Newcastle disease virus (NDV), and infectious laryngotracheitis virus (ILTV). Often the interval between vaccinations is only a matter of weeks, yet it is unknown whether the development of immunity and protection against challenge when vaccines are given in short succession occurs in these birds, something known as viral interference...
February 2, 2019: Viruses
Luis Tataje-Lavanda, Ray Izquierdo-Lara, Phillip Ormeño-Vásquez, Katherine Huamán-Gutiérrez, Mirko Zimic-Peralta, Manolo Fernández-Díaz
Here, we report the near-complete genome sequence of the infectious bronchitis virus (IBV) strain VFAR-047, isolated in Peru in 2014. This strain was classified into GI lineage 16 (GI-16) based on both the genome and Spike 1 (S1) sequence analysis. Furthermore, four potential recombination events with other GI-16 and GI-11 strains were identified.
January 2019: Microbiology resource announcements
H F Ellakany, A R Elbestawy, H S Abd-Elhamid, A R Gado, A A Nassar, M A Abdel-Latif, I I Abo Ghanima, M E Abd El-Hack, A A Swelum, I M Saadeldin, H A Ba-Awadh, A N Alowaimer
Ornithobacterium rhinotracheale (ORT), a bacterium causing respiratory tract infection, has led to a significant problem in the intensive poultry production in Egypt. Polymerase chain reaction-amplified 784-bp specific ORT DNA fragments were found in 7 ORT isolates from lungs, air sacs, and tracheas of commercial broilers or layers in Egypt in 2015. The objective of this study was to investigate the role of the live variant IBV 4/91 with ORT infection. A total of 120 14-d-old broiler chickens (Cobb 500) were equally divided into 4 groups for experimental infection in a complete randomized design...
January 1, 2019: Poultry Science
Yi Liu, Hyon-Xhi Tan, Marios Koutsakos, Sinthujan Jegaskanda, Robyn Esterbauer, Danielle Tilmanis, Malet Aban, Katherine Kedzierska, Aeron C Hurt, Stephen J Kent, Adam K Wheatley
Influenza B viruses (IBV) drive a significant proportion of influenza-related hospitalisations yet are understudied compared to influenza A. Current vaccines target the head of the viral hemagglutinin (HA) which undergoes rapid mutation, significantly reducing vaccine effectiveness. Improved vaccines to control IBV are needed. Here we developed novel IBV HA probes to interrogate humoral responses to IBV in humans. A significant proportion of IBV HA-specific B cells recognise both B/Victoria/2/87-like and B/Yamagata/16/88-like lineages in a distinct pattern of cross-reactivity...
January 18, 2019: Nature Communications
Liwen Xu, Mengting Ren, Jie Sheng, Tianxin Ma, Zongxi Han, Yan Zhao, Junfeng Sun, Shengwang Liu
Infectious bronchitis viruses (IBVs) of GI-13 (793/B) and GI-19 (QX/LX4) lineages have been frequently detected in China in recent years. Naturally recombinant IBVs originating from the GI-13 and GI-19 lineages have also been isolated from chicken flocks with respiratory and renal problems in China. Thorough genetic and biological investigations of these recombinant viruses have led to speculation regarding their origin, evolution, and control. In order to confirm the previous results and further extend our understanding about the characteristics of the four recombinant IBV strains we had previously identified (I0718/17, I0722/17, I0724/17, and I0737/17), we conducted phylogenetic analysis by comparing their complete S1 gene sequences with those of 71 reference strains of different genotypes and lineages...
January 11, 2019: Virus Research
Hongliu An, Zhichao Cai, Yuying Yang, Zhaoxiong Wang, Ding Xiang Liu, Shouguo Fang
Viral noncoding (nc) RNAs have been shown to play important roles in viral life cycle. Many viruses employ different mechanism to produce ncRNAs. Here, we report that coronavirus infectious bronchitis virus (IBV) produces a novel ncRNA in virus-infected cells. This ncRNA consists of 563 nucleotides excluding a poly(A) tail, is mainly derived from the 3'-untranslated region of IBV genome, and contains a 63-nt-long of terminal leader sequence derived from the 5' end of the viral genome. Using mutagenesis and reverse genetics, we reveal that this ncRNA is a subgenomic RNA generated by discontinuous transcription mechanism...
January 4, 2019: Virology
Huan Wang, Xiao Yuan, Yingjie Sun, Xiang Mao, Chunchun Meng, Lei Tan, Cuiping Song, Xusheng Qiu, Chan Ding, Ying Liao
Although several reports suggest that the entry of infectious bronchitis virus (IBV) depends on lipid rafts and low pH, the endocytic route and intracellular trafficking are unclear. In this study, we aimed to shed greater light on early steps in IBV infection. By using chemical inhibitors, RNA interference, and dominant negative mutants, we observed that lipid rafts and low pH was indeed required for virus entry; IBV mainly utilized the clathrin mediated endocytosis (CME) for entry; GTPase dynamin 1 was involved in virus containing vesicle scission; and the penetration of IBV into cells led to active cytoskeleton rearrangement...
December 28, 2018: Virology
A Lounas, K Oumouna-Benachour, H Medkour, M Oumouna
Background and Aim: Avian infectious bronchitis virus (IBV) frequently infects broilers and is responsible for severe economic losses to the poultry industry worldwide. It has also been associated with kidney damage in the broiler flocks. The aim of the present study is to determine the presence of IBV and its possible involvement in kidney damage of broiler chicks. Materials and Methods: 14 clinically diseased broiler flocks from Western and Central Algeria were sampled and analyzed by hemagglutination inhibition (HI) test and reverse transcriptase-polymerase chain reaction (RT-PCR) followed by phylogenic analysis...
November 2018: Veterinary World
Justyna Miłek, Katarzyna Blicharz-Domańska
Coronaviruses (CoVs) are a large group of enveloped viruses with a single-strand RNA genome, which continuously circulate in mammals and birds and pose a threat to livestock, companion animals, and humans. CoVs harboured by avian species are classified to the genera gamma- and deltacoronaviruses. Within the gamma-CoVs the main representative is avian coronavirus, a taxonomic name which includes the highly contagious infectious bronchitis viruses (IBVs) in chickens and similar viruses infecting other domestic birds such as turkeys, guinea fowls, or quails...
September 2018: Journal of Veterinary Research
Clément Fage, Yacine Abed, Liva Checkmahomed, Marie-Christine Venable, Guy Boivin
Three neuraminidase inhibitors (NAIs: Oseltamivir, zanamivir and peramivir) are currently approved in many countries for the treatment of influenza A and B infections. The emergence of influenza B viruses (IBVs) containing mutations of cross-resistance to these NAIs constitutes a serious clinical threat. Herein, we used a reverse genetics system for the current B/Phuket/3073/2013 vaccine strain to investigate the impact on in vitro properties and virulence of H136N, R152K, D198E/N, I222T and N294S NA substitutions (N2 numbering), reported by the World Health Organization (WHO) as clinical markers of reduced or highly-reduced inhibition (RI/HRI) to multiple NAIs...
December 22, 2018: Viruses
Giovanni Franzo, Mattia Cecchinato, Giovanni Tosi, Laura Fiorentini, Francesca Faccin, Claudia Maria Tucciarone, Tiziana Trogu, Ilaria Barbieri, Paola Massi, Ana Moreno
The genetic variability of Infectious bronchitis virus (IBV) is one of the main challenges for its control, hindering not only the development of effective vaccination strategies but also its classification and, consequently, epidemiology understanding. The 624/I and Q1 genotypes, now recognized to be part of the GI-16 lineage, represent an excellent example of the practical consequences of IBV molecular epidemiology limited knowledge. In fact, being their common origin unrecognized for a long time, independent epidemiological pictures were drawn for the two genotypes...
2018: PloS One
Paula Fonseca Finger, Michele Soares Pepe, Luana Alves Dummer, Carolina Georg Magalhães, Clarissa Caetano de Castro, Silvia de Oliveira Hübner, Fábio Pereira Leivas Leite, Giseli Aparecida Ritterbusch, Paulo Augusto Esteves, Fabricio Rochedo Conceição
BACKGROUND: The avian infectious bronchitis virus (IBV) remains a significant source of loss in the poultry industry and early diagnosis is required to prevent the disease from spreading. This study examined the combined use of an ELISA and Western blot (WB) to detect antibodies against the nucleocapsid protein (N) of IBV. The coding sequence for N was amplified by RT-PCR and expressed in Escherichia coli. A soluble recombinant N protein (rN) of approximately 50 kDa was obtained. A total of 389 sera were tested against the rN in ELISA and the results were compared with those of the commercial IDEXX IBV Ab test...
December 12, 2018: Virology Journal
Aruna Amarasinghe, Upasama De Silva Senapathi, Mohamed Sarjoon Abdul-Cader, Shelly Popowich, Frank Marshall, Susan C Cork, Frank van der Meer, Susantha Gomis, Mohamed Faizal Abdul-Careem
BACKGROUND: Infectious bronchitis virus (IBV) is one of the leading causes of mortality and morbidity in chickens. There are numerous serotypes and variants, which do not confer cross protection resulting in failure of currently used IBV vaccines. Although variant IBV isolates with major genetic differences have been subjected to comparative studies, it is unknown whether minor genetic differences in IBV variants within a serotype are different in terms of pathogenesis and eliciting host responses...
December 10, 2018: BMC Veterinary Research
Hussein M Galal, Azza M Tawfek, Mohamed I Abdrabou, Ashgan Mohamed Hessain, Jwaher Haji Alhaaji, Saleh A Kabli, Ayman Elbehiry, Waleed K Alwarhi, Ihab M Moussa
This study was conducted on 100 one-day-old broiler chicks to evaluate the effect of Poulvac E. coli vaccine in reduction of clinical signs and complications after concurrent infectious bronchitis virus (variant 02) and virulent E. coli O78 challenges. The birds were evaluated for clinical signs, mortality for 7 days post-infection, PM lesion score, average body weight and serological evaluation. Re-isolation and RT-PCR for the challenging infectious bronchitis virus (IBV) variant 02 were conducted thereafter...
November 2018: Saudi Journal of Biological Sciences
G Horst, R Levine, R Chick, C Hofacre
This 42-day study evaluated the effects of dietary supplementation with β-1,3-glucan (Aleta™) on the vaccination response to Newcastle disease virus (NDV), avian infectious bronchitis virus (IBV), and infectious bursal disease (IBD) in a non-challenged environment. This trial included 600 chicks (all vaccinated with IBD at the hatchery) which were assigned to 1 of 3 treatments: vaccination (NDV, IBV), no vaccination, or vaccination combined with feed supplemented with Aleta (100 g/MT of feed). The vaccination with Aleta treatment group showed a trend for improved FCR that was not statistically significant...
November 23, 2018: Poultry Science
Gang Xu, Jinlong Cheng, Shuhui Ma, Wenfeng Jia, Shihong Yan, Guozhong Zhang
TW-like IBV isolates have appeared frequently in recent years in mainland China. In this study, we compared the TW-like IBV GD strain and the predominant QX-like SD strain in terms of serology and pathogenicity to 3-week-old specific-pathogen-free chickens. Both strains could cause severe respiratory distress and renal lesions, with a mortality rate were approximately 20%. Virus were continuously shed via the respiratory tract and cloaca. However, the infection pattern of the two isolates were different. The GD strain persisted for a longer duration and caused extensive damages to the tracheas and lungs...
December 2018: Veterinary Microbiology
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"