Avian Pathology Journal Impact Factor & Information

Publisher: Taylor & Francis

Journal description

Avian Pathology is a leading journal that has the aim of disseminating knowledge concerned with the entire field of research on infectious and non-infectious diseases of poultry and all other birds. Original research is published in the form of full papers, short communications and case reports. Subject areas include pathology, immune responses, vaccines, genetics e.g. in relation to disease resistance/susceptibility, epidemiology, diagnosis, detection and characterization of pathogens, gene sequences, and physiology and biochemistry (provided that the physiological and biochemical data refer to disease). Authoritative Reviews, Commentary Articles on topical subjects and Technical Reviews (detection and differentiation of pathogens) are published from time to time.

Current impact factor: 2.04

Impact Factor Rankings

2015 Impact Factor Available summer 2015
2013 / 2014 Impact Factor 2.041
2012 Impact Factor 1.729
2011 Impact Factor 1.711
2010 Impact Factor 1.967
2009 Impact Factor 1.654
2008 Impact Factor 1.7
2007 Impact Factor 1.257
2006 Impact Factor 1.809
2005 Impact Factor 1.789
2004 Impact Factor 1.387
2003 Impact Factor 1.271
2002 Impact Factor 1.514
2001 Impact Factor 1.655
2000 Impact Factor 1.428
1999 Impact Factor 0.845
1998 Impact Factor 0.705
1997 Impact Factor 0.769
1996 Impact Factor 0.754
1995 Impact Factor 0.734
1994 Impact Factor 0.629
1993 Impact Factor 0.664
1992 Impact Factor 1.089

Impact factor over time

Impact factor

Additional details

5-year impact 1.95
Cited half-life 9.60
Immediacy index 0.30
Eigenfactor 0.00
Article influence 0.55
Website Avian Pathology website
Other titles Avian pathology (En ligne)
ISSN 1465-3338
OCLC 57214916
Material type Document, Periodical, Internet resource
Document type Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

Taylor & Francis

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Some individual journals may have policies prohibiting pre-print archiving
    • On author's personal website or departmental website immediately
    • On institutional repository or subject-based repository after either 12 months embargo
    • Publisher's version/PDF cannot be used
    • On a non-profit server
    • Published source must be acknowledged
    • Must link to publisher version
    • Set statements to accompany deposits (see policy)
    • The publisher will deposit in on behalf of authors to a designated institutional repository including PubMed Central, where a deposit agreement exists with the repository
    • STM: Science, Technology and Medicine
    • Publisher last contacted on 25/03/2014
    • This policy is an exception to the default policies of 'Taylor & Francis'
  • Classification
    ​ green

Publications in this journal

  • Avian Pathology 12/2015;
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    ABSTRACT: Dermanyssus gallinae, the poultry red mite (PRM), is a blood feeding ectoparasite capable of causing pathology in birds, amongst other animals. It is an increasingly important pathogen in egg-layers and is responsible for substantial economic losses to the poultry industry worldwide. Even though PRM poses a serious problem, very little is known about the basic biology of the mite. Here we review the current body of literature describing red mite biology and discuss how this has been, or could be, used to develop methods to control PRM infestations. We focus primarily on the PRM digestive system, salivary glands, nervous system and exoskeleton and also explore areas of PRM biology which have to date received little or no study but have the potential to offer new control targets.
    Avian Pathology 04/2015; DOI:10.1080/03079457.2015.1030589
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    ABSTRACT: Turkey arthritis reovirus (TARV) has been isolated from the gastrocnemius tendons and tibiotarsal joint fluid of lame, >12-week-old male turkeys in the Midwest. Two experiments were conducted to compare the pathogenicity in turkeys of three TARVs (TARV-MN2, TARV-MN4 and TARV-O’Neil) one turkey enteric reovirus (TERV), and one chicken arthritis reovirus (CARV) . Two hundred ul of virus was inoculated by oral, intratracheal, or footpad route into 6-day-old poults placed in isolator units. Poults were necropsied at 1 and 4 weeks post infection (PI) in Experiment 1 and at 2 and 4 weeks PI in Experiment 2. Reovirus was detected by RT-PCR and virus isolation in tendons of TARV-inoculated poults at 1, 2 and 4 weeks PI. In general, TARVs produced lymphocytic tenosynovitis of the gastrocnemius and digital flexor tendon sheaths without inflammation of the tendons proper. In Experiment 1, poults inoculated with TARV-MN2 and TARV-O’Neil had significantly higher gastrocnemius tendon inflammation scores, as determined by histology, than those inoculated with TERV-MN1 or CARV-MN1. In Experiment 2, poults inoculated with TARV-MN2 and TARV-O’Neil had significantly higher gastrocnemius tendon inflammation scores than those inoculated with TARV-MN4 and virus-free medium (negative control group). Koch’s postulate was fulfilled when TARV-MN2 and TARV-O’Neil were re-isolated from tendons of poults that had originally been challenged with either of these viruses. Results of these experiments indicate that TARVs have a unique ability to induce gastrocnemius tenosynovitis in turkeys and that administration of TARV-O’Neil through oral or intratracheal route is a reproducible model to study pathogenesis of TARV infection.
    Avian Pathology 07/2014;
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    ABSTRACT: In a prospective longitudinal study a broiler breeder flock and its progeny were monitored for the presence of avian hepatitis E virus (HEV) RNA and antibodies. The flock was part of a multiple age farm where the presence of avian HEV with clinical symptoms (increased mortality and decreased egg production) was demonstrated in several previous production cycles. Samples were taken twice at the rearing site and several times at the production site from broiler breeders including roosters and day-old chicks. The samples were investigated by conventional and real-time RT-PCR, enzyme linked immunosorbent assay (ELISA) and histological methods. At all time points samples from the hens were positive for avian HEV RNA. The birds did not show any clinical signs, even though histopathological lesions in liver and spleen of non-specific aetiology could be demonstrated. A significant increase in number of positive birds and viral load was seen in week 45, in accordance with an increase in antibody titres. In comparison, roosters investigated in week 62 tested negative by RT-PCR and ELISA. Avian HEV RNA was also detected in day-old chicks hatched from eggs laid in week 25, indicating vertical transmission. All partial helicase and capsid sequences retrieved within this study clustered together and were identical to previous sequences obtained from the same multiple age farm. It is concluded that avian HEV persisted on the farm over years and circulated between the rearing and the production site without causing any clinical signs although high viral loads in the adult hens were observed.
    Avian Pathology 05/2014; DOI:10.1080/03079457.2014.924616
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    ABSTRACT: The safety and efficacy of an aroA-deleted live vaccine against avian colibacillosis (Poulvac® E. coli) was evaluated in broilers in a multicenter field trial. The trial sites consisted of 18 paired bird houses (randomly assigned to either the vaccination or the control treatment groups), located in 15 farms in three different regions of Morocco. A field dose of vaccine was administered at day of hatch by spray route. Both clinical and performance parameters were compared between vaccinated and control groups, in which the experimental unit was defined as the individual bird house. No adverse reactions attributable to the vaccine were observed throughout the study. Non-inferiority of the vaccinated bird houses versus the control houses during a two-week period post-vaccination was statistically demonstrated for mortality and average daily weight gain. Vaccine efficacy was confirmed based on significant differences between vaccinated and unvaccinated groups measured for the full duration of the trial, including: colibacillosis-like lesions observed at slaughter (1.7 versus. 3.5%; P = 0.0054); total mortality (9.3 versus 10.3%; P = 0.0203); average daily weight gain (47.8 versus 46.2 g per day; P = 0.0006); average number of antibiotic treatment days (0.5 versus 2.0; P = 0.0008) and the percentage of the birds that was marketed (90.0 versus 89.0%; P = 0.0309). In conclusion, the vaccine was demonstrated to be both safe and efficacious under field conditions.
    Avian Pathology 05/2014; 43(3):1-21. DOI:10.1080/03079457.2014.917760
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    ABSTRACT: Egg-related outbreaks of salmonellosis are a significant health concern. Although Salmonella Enteritidis (SE) is the major egg-associated serotype, Salmonella Typhimurium (ST) can also infect the hen's reproductive tract and contaminate eggs. Recently monophasic and aphasic variants of ST have been reported with increased frequency in Europe, and the isolation of these variants from laying flocks triggers the same legislative restrictions associated with biphasic ST strains. However, little is known about the colonisation, invasiveness and persistence of monophasic and aphasic ST strains in laying hens. In this study, seven groups of day-old and point-of-lay commercial Hy-line chicken layers were separately challenged with 4 different strains of monophasic ST, one aphasic ST, one biphasic ST and one egg invasive SE strain. Tissue samples and cloacal swabs (point-of-lay chickens only) were collected at regular intervals post-challenge in order to recover the Salmonella challenge strains. In day-old chicks, only the aphasic ST strain and the SE strain were recovered after direct plating, suggesting that the number of salmonellas colonising the tissues of the chicks infected with the other strains was likely to be low. Interestingly, all the strains colonised well in the point-of-lay chickens, and there was no statistical difference in the overall number of positive samples or Salmonella counts between the seven strains. Salmonella was recovered from the point-of-lay birds upto the end of the study (20 days after challenge). Monophasic and aphasic ST strains colonised point-of-lay birds as efficiently as biphasic ST and SE strains. Further studies are necessary to estimate the invasiveness of these strains in naturally-infected vaccinated laying hens, and to assess the impact of natural infection on egg contamination.
    Avian Pathology 05/2014; 43(3):1-22. DOI:10.1080/03079457.2014.917759
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    ABSTRACT: In order to investigate the possibility of in ovo infection with avian bornavirus (ABV) in wild Canada geese (Branta canadensis), 53 eggs were opportunistically collected at various stages of embryonic development from 16 free-ranging goose nests at a large urban zoo site where ABV infection is known to be present in this species. ABV RNA was detected in the yolk of one of three unembryonated eggs using real time reverse transcription polymerase chain reaction. ABV RNA was not identified in the brains from 23 newly hatched goslings or 19 embryos, nor from 3 early whole embryos. Antibodies against ABV were not detected in the plasma of any of the hatched goslings using an enzyme-linked immunosorbent assay. Possible reasons for the failure to detect ABV RNA in hatchlings or embryos include low sample size, eggs deriving from parents not actively infected with ABV, the testing of only brain tissue, and failure of the virus to replicate in Canada goose embryos. In conclusion, this preliminary investigation demonstrating the presence of ABV RNA in the yolk of a Canada goose egg provides the first evidence for the potential for vertical transmission of ABV in waterfowl.
    Avian Pathology 05/2014; 43(4):1-16. DOI:10.1080/03079457.2014.921279
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    ABSTRACT: Infectious bronchitis virus (IBV) is a coronavirus of the chicken. It is a highly contagious pathogen and in addition to causing respiratory and kidney diseases, it can affect the reproductive organs, resulting loss of production and poor egg quality. Despite the global distribution of IBV, Finland has been free of clinical cases for almost three decades. Since April 2011, outbreaks involving genotypes QX, D274-like and 4/91-like, have occurred in southern Finland. The clinical samples studied were submitted to the Finnish Food Safety Authority Evira from different regions of Finland during 2011-2013 and originated from a voluntary health monitoring programme, a national survey for avian influenza and from diagnostic specimens from both commercial poultry production and hobby flocks. The sources of the infections are not known, but strains D274 and 4/91 are widely used in vaccines elsewhere.
    Avian Pathology 04/2014; 43(3):1-18. DOI:10.1080/03079457.2014.913770
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    ABSTRACT: Infectious bronchitis virus (IBV) was detected in 185 samples originating from chicken flocks of various commodity groups in Canada. Flocks with clinical signs such as respiratory challenge, sudden death, egg production problems, or nephropathogenic conditions, and randomly selected flocks sampled at slaughter as part of an Ontario broiler surveillance project, were included. Most samples were from Ontario and Québec; however, a small number from British Columbia, Nova Scotia, and Newfoundland and Labrador were also analyzed. The nucleotide sequence of the spike (S) protein gene was compared with sequences available in GenBank. Based on their S gene sequence similarities, Canadian IBVs could be divided into nine genotypes belonging to four groups: (1) Canadian variant virus, strain Qu_mv; (2) the classic, vaccine-like viruses, Connecticut and Massachusetts; (3) US variant-like virus strains, California 1734/04, California 99, CU_82792, Pennsylvania 1220/98 and Pennsylvania Wolg/98; and (4) non-Canadian, non-US virus, strain 4/91. Based on the field situation, the effectiveness of current vaccination practices mostly based on Massachusetts and Connecticut-type vaccines appeared generally satisfactory for minimizing the damage due to infection with Canadian variant and US variant-like viruses. However, the recent outbreaks of severe respiratory disease and production problems in Ontario chicken flocks related to the incursion of IBV strain 4/91 were not prevented by standard vaccination protocols. It appears that IBV strain 4/91 has now become endemic in Ontario and the need for 4/91-type vaccines must be evaluated.
    Avian Pathology 04/2014; 43(3):1-15. DOI:10.1080/03079457.2014.916395
  • Article: Obituary.
    Avian Pathology 04/2014;
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    ABSTRACT: The emergence of new variant strains of the poultry pathogen infectious bronchitis virus (IBV) is continually reported worldwide, owing to the labile nature of the large single-stranded RNA IBV genome. High resolution melt (HRM) curve analysis previously detected a variant strain, N1/08, and the present study confirmed that this strain had emerged as a result of recombination between Australian subgroup 2 and 3 strains in the Spike gene region, in a similar manner reported for Turkey coronaviruses. The S1 gene for N1/08 had highest nucleotide similarity with subgroup 2 strains, which is interesting considering subgroup 2 strains have not been detected since the early 1990s. Simplot analysis of the 7.2 kb 3' end of the N1/08 genome with the same region for other Australian reference strains identified the sites of recombination as immediately upstream and downstream of the S1 gene. A pathogenicity study in 2-week-old chickens found that N1/08 had similar pathogenicity for chicken respiratory tissues to that reported for subgroup 2 strains than subgroup 3 strains. The results of this study demonstrate that recombination is a mechanism utilised for the emergence of new strains of IBV, with the ability to alter strain pathogenicity in a single generation.
    Avian Pathology 04/2014; 43(3):1-25. DOI:10.1080/03079457.2014.914624
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    ABSTRACT: The aim of this study was to investigate the resistance mechanisms of quinolones, macrolides and tetracycline in campylobacter isolates from grandparent and parent broiler breeders in Spain. Twenty-six isolates were investigated for quinolone resistance, three isolates for macrolide resistance and 39 for tetracycline resistance. All of the quinolone-resistant isolates possessed the mutation Thr86Ile in the quinolone resistance-determining region of gyrA and one isolate possessed the mutation Pro104Ser. Only one Campylobacter coli population (defined by restriction fragment length polymorphism-polymerase chain reaction of flaA and pulsed field gel electrophoresis) was resistant to erythromycin, and the mutation A2075G (23S rDNA) was responsible for macrolide resistance. The tetO gene was found in all of the tetracycline-resistant isolates. Twenty-two out of the 39 isolates investigated by Southern blot possessed chromosomic location of tetO and 17 were located on plasmids. Most of the plasmids with tetO were of around 60 kb and conjugation was demonstrated in a selection of them. In conclusion, we showed that Thr86Ile is highly prevalent in quinolone-resistant isolates as well as mutation A2075G in macrolide-resistant isolates of poultry origin. More variability was found for tetO. The possibility of horizontal transmission of tetO among campylobacter isolates is also an issue of concern in public health.
    Avian Pathology 04/2014; 43(2):176-82. DOI:10.1080/03079457.2014.898245
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    ABSTRACT: The aim of this study was to determine the presence of virulence genes and antibiotic resistance profiles in 164 Escherichia coli strains isolated from birds (feral pigeons, hybrid ducks, house sparrows and spotless starlings) inhabiting urban and rural environments. A total of eight atypical enteropathogenic E. coli strains were identified: one in a house sparrow, four in feral pigeons and three in spotless starlings. Antibiotic resistance was present in 32.9% (54) of E. coli strains. The dominant type of resistance was to tetracycline (21.3%), ampicillin (19.5%) and sulfamethoxazole (18.9%). Five isolates had class 1 integrons containing gene cassettes encoding for dihydrofolate reductase A (dfrA) and aminoglycoside adenyltransferase A (aadA), one in a feral pigeon and four in spotless starlings. To our knowledge, the present study constitutes the first detection of virulence genes from E. coli in spotless starlings and house sparrows, and is also the first identification worldwide of integrons containing antibiotic resistance gene cassettes in E. coli strains from spotless starlings and pigeons.
    Avian Pathology 04/2014; 43(2):172-5. DOI:10.1080/03079457.2014.897683
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    ABSTRACT: In Bangladesh, highly pathogenic avian influenza (HPAI) virus subtype H5N1 was first detected in February 2007. Since then the virus has become entrenched in poultry farms of Bangladesh. There have so far been seven human cases of H5N1 HPAI infection in Bangladesh with one death. The objective of the present study was to investigate the molecular evolution of H5N1 HPAI viruses during 2007 to 2012. Partial or complete nucleotide sequences of all eight gene segments of two chicken isolates, five gene segments of a duck isolate and the haemagglutinin gene segment of 18 isolates from Bangladesh were established in the present study and subjected to molecular analysis. In addition, full-length sequences of different gene segments of other Bangladeshi H5N1 isolates available in GenBank were included in the analysis. The analysis revealed that the first introduction of clade 2.2 virus in Bangladesh in 2007 was followed by the introduction of clade and 2.3.4 viruses in 2011. However, only clade viruses could be isolated in 2012, indicating progressive replacement of clade 2.2 and 2.3.4 viruses. There has been an event of segment re-assortment between H5N1 and H9N2 viruses in Bangladesh, where H5N1 virus acquired the PB1 gene from a H9N2 virus. Point mutations have accumulated in Bangladeshi isolates over the last 5 years with potential modification of receptor binding site and antigenic sites. Extensive and continuous molecular epidemiological studies are necessary to monitor the evolution of circulating avian influenza viruses in Bangladesh.
    Avian Pathology 04/2014; 43(2):183-94. DOI:10.1080/03079457.2014.898244
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    ABSTRACT: Extended-spectrum β-lactamase (ESBL) -producing Escherichia coli have been documented in humans as well as in food-producing animals, including chickens, and for unknown reasons, their prevalence has increased significantly during the last decade. With E. coli as a major opportunistic pathogen in chickens and with a potential for zoonotic transfer to human beings, ESBL-producing E. coli represent a major risk both to poultry production and to human health. The review presents some of the current problems with ESBL-producing E. coli in relation to poultry production with a focus on chickens. To illustrate issues in relation to screening and typing, two case studies are included where one collection of ESBL-producing E. coli isolates was obtained from asymptomatic carrier chickens while the other was obtained from lesions in chickens. Pulse field gel electrophoresis and multi-locus sequence typing revealed a highly heterogeneous population of ESBL-producing E. coli. All isolates harboured between one and three large plasmids (> 100 kb). Among isolates associated with asymptomatic chicken, the ESBL types SHV and TEM dominated, while CTX-M-1 dominated in disease-associated isolates. Isolates from diseased birds were occasionally of sequence types (ST) often associated with human infections, such as ST131. With improved tools to trace and screen for ESBL-producing E. coli at farm level, strategies can be selected that aim to reduce or eliminate the presence of ESBL-producing E. coli in poultry and poultry products meant for human consumption.
    Avian Pathology 03/2014; 43(3). DOI:10.1080/03079457.2014.907866