<p>Avian influenza virus prevalence (A) and seroprevalence (B) in 7 wild bird species sampl... more <p>Avian influenza virus prevalence (A) and seroprevalence (B) in 7 wild bird species sampled in the Netherlands between 2006 and 2009 in relation to the level of urbanization. Grey bars indicate number of birds sampled (left Y-axes) and triangles indicate prevalence (right Y-axes).</p
In het kader van een langlopende studie naar overwinterende Kokmeeuwen in Nederland is in de wint... more In het kader van een langlopende studie naar overwinterende Kokmeeuwen in Nederland is in de winter van 1996/1997 gestart met een kleurringproject. Hiertoe zijn in zes steden Kokmeeuwen van kleurringen voorzien. Het doel van hel project is om een beeld te krijgen van de plaatstrouw van in Nederlandse steden overwinterende Kokmeeuwen. In dit artikel worden de eerste resultaten gepresenteerd.
Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin, 2018
IntroductionHighly pathogenic avian influenza (HPAI) viruses of subtype H5N8 were re-introduced i... more IntroductionHighly pathogenic avian influenza (HPAI) viruses of subtype H5N8 were re-introduced into the Netherlands by late 2016, after detections in south-east Asia and Russia. This second H5N8 wave resulted in a large number of outbreaks in poultry farms and the deaths of large numbers of wild birds in multiple European countries. Methods: Here we report on the detection of HPAI H5N8 virus in 57 wild birds of 12 species sampled during active (32/5,167) and passive (25/36) surveillance activities, i.e. in healthy and dead animals respectively, in the Netherlands between 8 November 2016 and 31 March 2017. Moreover, we further investigate the experimental approach of wild bird serology as a contributing tool in HPAI outbreak investigations. Results: In contrast to the first H5N8 wave, local virus amplification with associated wild bird mortality has occurred in the Netherlands in 2016/17, with evidence for occasional gene exchange with low pathogenic avian influenza (LPAI) viruses. ...
Highly pathogenic avian influenza (HPAI) A(H5N8) viruses that emerged in poultry in east Asia sin... more Highly pathogenic avian influenza (HPAI) A(H5N8) viruses that emerged in poultry in east Asia since 2010 spread to Europe and North America by late 2014. Despite detections in migrating birds, the role of free-living wild birds in the global dispersal of H5N8 virus is unclear. Here, wild bird sampling activities in response to the H5N8 virus outbreaks in poultry in the Netherlands are summarised along with a review on ring recoveries. HPAI H5N8 virus was detected exclusively in two samples from ducks of the Eurasian wigeon species, among 4,018 birds sampled within a three months period from mid-November 2014. The H5N8 viruses isolated from wild birds in the Netherlands were genetically closely related to and had the same gene constellation as H5N8 viruses detected elsewhere in Europe, in Asia and in North America, suggesting a common origin. Ring recoveries of migratory duck species from which H5N8 viruses have been isolated overall provide evidence for indirect migratory connection...
Infections of domestic and wild birds with low-pathogenic avian influenza viruses (LPAIVs) have b... more Infections of domestic and wild birds with low-pathogenic avian influenza viruses (LPAIVs) have been associated with protective immunity to subsequent infection. However, the degree and duration of immunity in wild birds from previous LPAIV infection, by the same or a different subtype, are poorly understood. Therefore, we inoculated H13N2 (A/black-headed gull/Netherlands/7/2009) and H16N3 (A/black-headed gull/Netherlands/26/2009) LPAIVs into black-headed gulls ( Chroicocephalus ridibundus ), their natural host species, and measured the long-term immune response and protection against one or two reinfections over a period of >1 year. This is the typical interval between LPAIV epizootics in wild birds. Reinfection with the same virus resulted in progressively less virus excretion, with complete abrogation of virus excretion after two infections for H13 but not H16. However, reinfection with the other virus affected neither the level nor duration of virus excretion. Virus excretion...
Virtually nothing is known about natal dispersal distances of the introduced Egyptian Goose in Eu... more Virtually nothing is known about natal dispersal distances of the introduced Egyptian Goose in Europe. In this paper we document two records of long-distance natal dispersal obtained in 2010. The first record concerns a male born in Arnhem, The Netherlands, in March 2009, that bred successfully in Essen-Borbeck, Germany, 92 km to the south-east, in 2010 (Fig. 1) and in 2011. The second record is a male born in Jever, Germany, in the spring of 2009. The bird was paired with a female that was recorded breeding between 17 June and 12 July 2010 in Groningen, The Netherlands, 96 km to the west-southwest (Fig. 2). Both breeding records were new settlements, and they fit with a theoretical model proposed by Lensink (1998) that indicated that new settlements can occur at distances of up to 100-200 km. Other ring-recoveries emphasize that movements of 50-150 km are not uncommon for birds of the continental population, as opposed to British birds. All in all, the data suggest that the contine...
<p>Avian influenza virus prevalence (A) and seroprevalence (B) in 7 wild bird species sampl... more <p>Avian influenza virus prevalence (A) and seroprevalence (B) in 7 wild bird species sampled in the Netherlands between 2006 and 2009 in relation to the level of urbanization. Grey bars indicate number of birds sampled (left Y-axes) and triangles indicate prevalence (right Y-axes).</p
In het kader van een langlopende studie naar overwinterende Kokmeeuwen in Nederland is in de wint... more In het kader van een langlopende studie naar overwinterende Kokmeeuwen in Nederland is in de winter van 1996/1997 gestart met een kleurringproject. Hiertoe zijn in zes steden Kokmeeuwen van kleurringen voorzien. Het doel van hel project is om een beeld te krijgen van de plaatstrouw van in Nederlandse steden overwinterende Kokmeeuwen. In dit artikel worden de eerste resultaten gepresenteerd.
Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin, 2018
IntroductionHighly pathogenic avian influenza (HPAI) viruses of subtype H5N8 were re-introduced i... more IntroductionHighly pathogenic avian influenza (HPAI) viruses of subtype H5N8 were re-introduced into the Netherlands by late 2016, after detections in south-east Asia and Russia. This second H5N8 wave resulted in a large number of outbreaks in poultry farms and the deaths of large numbers of wild birds in multiple European countries. Methods: Here we report on the detection of HPAI H5N8 virus in 57 wild birds of 12 species sampled during active (32/5,167) and passive (25/36) surveillance activities, i.e. in healthy and dead animals respectively, in the Netherlands between 8 November 2016 and 31 March 2017. Moreover, we further investigate the experimental approach of wild bird serology as a contributing tool in HPAI outbreak investigations. Results: In contrast to the first H5N8 wave, local virus amplification with associated wild bird mortality has occurred in the Netherlands in 2016/17, with evidence for occasional gene exchange with low pathogenic avian influenza (LPAI) viruses. ...
Highly pathogenic avian influenza (HPAI) A(H5N8) viruses that emerged in poultry in east Asia sin... more Highly pathogenic avian influenza (HPAI) A(H5N8) viruses that emerged in poultry in east Asia since 2010 spread to Europe and North America by late 2014. Despite detections in migrating birds, the role of free-living wild birds in the global dispersal of H5N8 virus is unclear. Here, wild bird sampling activities in response to the H5N8 virus outbreaks in poultry in the Netherlands are summarised along with a review on ring recoveries. HPAI H5N8 virus was detected exclusively in two samples from ducks of the Eurasian wigeon species, among 4,018 birds sampled within a three months period from mid-November 2014. The H5N8 viruses isolated from wild birds in the Netherlands were genetically closely related to and had the same gene constellation as H5N8 viruses detected elsewhere in Europe, in Asia and in North America, suggesting a common origin. Ring recoveries of migratory duck species from which H5N8 viruses have been isolated overall provide evidence for indirect migratory connection...
Infections of domestic and wild birds with low-pathogenic avian influenza viruses (LPAIVs) have b... more Infections of domestic and wild birds with low-pathogenic avian influenza viruses (LPAIVs) have been associated with protective immunity to subsequent infection. However, the degree and duration of immunity in wild birds from previous LPAIV infection, by the same or a different subtype, are poorly understood. Therefore, we inoculated H13N2 (A/black-headed gull/Netherlands/7/2009) and H16N3 (A/black-headed gull/Netherlands/26/2009) LPAIVs into black-headed gulls ( Chroicocephalus ridibundus ), their natural host species, and measured the long-term immune response and protection against one or two reinfections over a period of >1 year. This is the typical interval between LPAIV epizootics in wild birds. Reinfection with the same virus resulted in progressively less virus excretion, with complete abrogation of virus excretion after two infections for H13 but not H16. However, reinfection with the other virus affected neither the level nor duration of virus excretion. Virus excretion...
Virtually nothing is known about natal dispersal distances of the introduced Egyptian Goose in Eu... more Virtually nothing is known about natal dispersal distances of the introduced Egyptian Goose in Europe. In this paper we document two records of long-distance natal dispersal obtained in 2010. The first record concerns a male born in Arnhem, The Netherlands, in March 2009, that bred successfully in Essen-Borbeck, Germany, 92 km to the south-east, in 2010 (Fig. 1) and in 2011. The second record is a male born in Jever, Germany, in the spring of 2009. The bird was paired with a female that was recorded breeding between 17 June and 12 July 2010 in Groningen, The Netherlands, 96 km to the west-southwest (Fig. 2). Both breeding records were new settlements, and they fit with a theoretical model proposed by Lensink (1998) that indicated that new settlements can occur at distances of up to 100-200 km. Other ring-recoveries emphasize that movements of 50-150 km are not uncommon for birds of the continental population, as opposed to British birds. All in all, the data suggest that the contine...
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Papers by Frank Majoor