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Book ; Online ; Thesis: Economic and zoonotic importance of co-infection by Eimeria and Toxoplasma in chicken herds

Andreopoulou, Marianna [Verfasser] / Daugschies, Arwid [Akademischer Betreuer] / Daugschies, Arwid [Gutachter] / Jung, Arne [Gutachter]

2023

Author's details	Marianna Andreopoulou ; Gutachter: Arwid Daugschies, Arne Jung ; Betreuer: Arwid Daugschies
Keywords	Landwirtschaft, Veterinärmedizin ; Agriculture, Veterinary Science
Subject code	sg630
Language	English
Publisher	Universitätsbibliothek Leipzig
Publishing place	Leipzig
Document type	Book ; Online ; Thesis
Database	Digital theses on the web

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Article ; Online: Prevalence and molecular characterization of Toxoplasma gondii in different types of poultry in Greece, associated risk factors and co-existence with Eimeria spp

Andreopoulou, Marianna / Schares, Gereon / Koethe, Martin / Chaligiannis, Ilias / Maksimov, Pavlo / Joeres, Maike / Cardron, Garance / Goroll, Tina / Sotiraki, Smaro / Daugschies, Arwid / Bangoura, Berit

Parasitol Res. 2023 Jan., v. 122, no. 1 p.97-111

2023

Abstract: Toxoplasma gondii is a protozoan parasite of public health importance, infecting all warm-blooded animals, including chickens. Undercooked chicken meat or relevant products such as sausages could lead to human infections. In free-range, organic and slow- ... ...

Abstract	Toxoplasma gondii is a protozoan parasite of public health importance, infecting all warm-blooded animals, including chickens. Undercooked chicken meat or relevant products such as sausages could lead to human infections. In free-range, organic and slow-growth farming systems where the susceptibility period for chickens is extended, more knowledge about potential risk factors is essential. This study is the first seroepidemiological survey in different regions and types of chicken farms in Greece, using a major tachyzoite surface antigen-based ELISA (TgSAG1), combined with magnetic-capture PCR (mc-PCR) and bioassay for the isolation of strains from the chickens’ tissues. Potential risk factors for T. gondii infection in these hosts were also investigated. Additionally, the co-existence of T. gondii and Eimeria spp. infections was assessed to elucidate epidemiological links between these two protozoan infections. Overall T. gondii seroprevalence was 9.5%. Of the backyard chickens sampled, 41.2% were seropositive and 70% of the organic and free-range layer farms had at least one T. gondii seropositive hen. No serologically positive broilers were found, although mc-PCR revealed a positive sample, highlighting the importance of accurate early-infection direct detection of T. gondii infections to ensure public health. T. gondii isolates obtained by mouse bioassay were genotyped. All belonged to type II (ToxoDB#3) as confirmed also by microsatellite typing. Production system, type of nutrition, and feeding system automation were identified as the most significant risk factors, while no association was found between the presence of cats and T. gondii seropositivity as calculated on both a farm level and per individual bird sampled.
Keywords	Eimeria ; Protozoa ; Toxoplasma gondii ; automation ; bioassays ; chicken meat ; farms ; genotyping ; hens ; humans ; mice ; microsatellite repeats ; nutrition ; parasites ; public health ; risk ; serological surveys ; seroprevalence ; tachyzoites ; Greece
Language	English
Dates of publication	2023-01
Size	p. 97-111.
Publishing place	Springer Berlin Heidelberg
Document type	Article ; Online
ZDB-ID	284966-5
ISSN	1432-1955 ; 0932-0113 ; 0044-3255
ISSN (online)	1432-1955
ISSN	0932-0113 ; 0044-3255
DOI	10.1007/s00436-022-07701-6
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: The inactivated infectious bronchitis virus (IBV) vaccine used as booster in layer hens influences the breadth of protection against challenge with IBV variants.

de Wit, J J Sjaak / De Herdt, Peter / Cook, Jane K A / Andreopoulou, Marianna / Jorna, Irene / Koopman, H C Rik

Avian pathology : journal of the W.V.P.A

2022 Volume 51, Issue 3, Page(s) 244–256

Abstract: To achieve long term protection of laying and breeding hens against aberrant egg production caused by infectious bronchitis virus (IBV), a vaccination programme incorporating both live-attenuated and inactivated IBV vaccines is required. High quality IBV ...

Abstract	To achieve long term protection of laying and breeding hens against aberrant egg production caused by infectious bronchitis virus (IBV), a vaccination programme incorporating both live-attenuated and inactivated IBV vaccines is required. High quality IBV vaccines of both types are widely available, but the number of IBV variants of global importance continues to increase and it is not possible to develop vaccines against each one of them. Therefore, it is desirable to perform studies under controlled conditions to determine which IBV vaccine(s) provide the best protection for laying hens against different IBV challenges. Previous vaccination and challenge studies have shown that it is possible to obtain relevant data in a small number of laying hens housed under conditions of strict isolation. The present work extends this finding by investigating the efficacy, against challenge with five IBV strains of global importance, of an IBV vaccination programme including two live-attenuated IBV vaccines (Massachusetts and 793B types) and three different commercially available inactivated vaccines each containing antigen against at least one IBV strain. The results reported here confirm the importance of IBV vaccination for laying hens, show that efficient live priming makes a beneficial contribution to this protection and confirm that inactivated IBV vaccines contribute significantly to effective protection against at least the five IBV challenge strains used here. Furthermore, we provide data to support the "protectotype concept", long-established using different live-attenuated IBV vaccines in young chickens, is valid in broadening protection against IBV challenges in laying birds.RESEARCH HIGHLIGHTSIBV vaccination is essential as an aid in protecting laying hens against IBV infection.Live priming is a beneficial part of the IBV vaccination programme.IBV inactivated vaccine improves IBV protection.Heterologous IBV protection is confirmed in laying hens.
MeSH term(s)	Animals ; Chickens ; Coronavirus Infections/prevention & control ; Coronavirus Infections/veterinary ; Female ; Infectious bronchitis virus ; Poultry Diseases ; Vaccination/veterinary ; Vaccines, Attenuated ; Vaccines, Inactivated ; Viral Vaccines
Chemical Substances	Vaccines, Attenuated ; Vaccines, Inactivated ; Viral Vaccines
Language	English
Publishing date	2022-03-07
Publishing country	England
Document type	Journal Article
ZDB-ID	1476380-1
ISSN	1465-3338 ; 0307-9457
ISSN (online)	1465-3338
ISSN	0307-9457
DOI	10.1080/03079457.2022.2040731
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Coxiella burnetii

Kalaitzakis, Emmanouil / Fancello, Tiziano / Simons, Xavier / Chaligiannis, Ilias / Tomaiuolo, Sara / Andreopoulou, Marianna / Petrone, Debora / Papapostolou, Aikaterini / Giadinis, Nektarios D / Panousis, Nikolaos / Mori, Marcella

Pathogens (Basel, Switzerland)

2021 Volume 10, Issue 3

Abstract: Ruminants are considered the commonest animal reservoir for human infection ... ...

Abstract	Ruminants are considered the commonest animal reservoir for human infection of
Language	English
Publishing date	2021-03-03
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2695572-6
ISSN	2076-0817
ISSN	2076-0817
DOI	10.3390/pathogens10030287
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Article ; Online: Prevalence and molecular characterization of Toxoplasma gondii in different types of poultry in Greece, associated risk factors and co-existence with Eimeria spp.

Parasitology research

2022

Abstract	Toxoplasma gondii is a protozoan parasite of public health importance, infecting all warm-blooded animals, including chickens. Undercooked chicken meat or relevant products such as sausages could lead to human infections. In free-range, organic and slow-growth farming systems where the susceptibility period for chickens is extended, more knowledge about potential risk factors is essential. This study is the first seroepidemiological survey in different regions and types of chicken farms in Greece, using a major tachyzoite surface antigen-based ELISA (TgSAG1), combined with magnetic-capture PCR (mc-PCR) and bioassay for the isolation of strains from the chickens' tissues. Potential risk factors for T. gondii infection in these hosts were also investigated. Additionally, the co-existence of T. gondii and Eimeria spp. infections was assessed to elucidate epidemiological links between these two protozoan infections. Overall T. gondii seroprevalence was 9.5%. Of the backyard chickens sampled, 41.2% were seropositive and 70% of the organic and free-range layer farms had at least one T. gondii seropositive hen. No serologically positive broilers were found, although mc-PCR revealed a positive sample, highlighting the importance of accurate early-infection direct detection of T. gondii infections to ensure public health. T. gondii isolates obtained by mouse bioassay were genotyped. All belonged to type II (ToxoDB#3) as confirmed also by microsatellite typing. Production system, type of nutrition, and feeding system automation were identified as the most significant risk factors, while no association was found between the presence of cats and T. gondii seropositivity as calculated on both a farm level and per individual bird sampled.
Language	English
Publishing date	2022-10-29
Publishing country	Germany
Document type	Journal Article
ZDB-ID	284966-5
ISSN	1432-1955 ; 0932-0113 ; 0044-3255
ISSN (online)	1432-1955
ISSN	0932-0113 ; 0044-3255
DOI	10.1007/s00436-022-07701-6
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: The inactivated infectious bronchitis virus (IBV) vaccine used as booster in layer hens influences the breadth of protection against challenge with IBV variants

de Wit, J. J. (Sjaak) / De Herdt, Peter / Cook, Jane K. A. / Andreopoulou, Marianna / Jorna, Irene / Koopman, H. C. (Rik)

Avian pathology. 2022 May 04, v. 51, no. 3

2022

Abstract	To achieve long term protection of laying and breeding hens against aberrant egg production caused by infectious bronchitis virus (IBV), a vaccination programme incorporating both live-attenuated and inactivated IBV vaccines is required. High quality IBV vaccines of both types are widely available, but the number of IBV variants of global importance continues to increase and it is not possible to develop vaccines against each one of them. Therefore, it is desirable to perform studies under controlled conditions to determine which IBV vaccine(s) provide the best protection for laying hens against different IBV challenges. Previous vaccination and challenge studies have shown that it is possible to obtain relevant data in a small number of laying hens housed under conditions of strict isolation. The present work extends this finding by investigating the efficacy, against challenge with five IBV strains of global importance, of an IBV vaccination programme including two live-attenuated IBV vaccines (Massachusetts and 793B types) and three different commercially available inactivated vaccines each containing antigen against at least one IBV strain. The results reported here confirm the importance of IBV vaccination for laying hens, show that efficient live priming makes a beneficial contribution to this protection and confirm that inactivated IBV vaccines contribute significantly to effective protection against at least the five IBV challenge strains used here. Furthermore, we provide data to support the “protectotype concept”, long-established using different live-attenuated IBV vaccines in young chickens, is valid in broadening protection against IBV challenges in laying birds. RESEARCH HIGHLIGHTSIBV vaccination is essential as an aid in protecting laying hens against IBV infection. Live priming is a beneficial part of the IBV vaccination programme. IBV inactivated vaccine improves IBV protection. Heterologous IBV protection is confirmed in laying hens.
Keywords	Infectious bronchitis virus ; antigens ; egg production ; live vaccines ; vaccination ; Massachusetts
Language	English
Dates of publication	2022-0504
Size	p. 244-256.
Publishing place	Taylor & Francis
Document type	Article
ZDB-ID	1476380-1
ISSN	1465-3338 ; 0307-9457
ISSN (online)	1465-3338
ISSN	0307-9457
DOI	10.1080/03079457.2022.2040731
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: First Identification and Molecular Characterization of Avian metapneumovirus Subtype B from Chickens in Greece.

Tucciarone, Claudia Maria / Andreopoulou, Marianna / Franzo, Giovanni / Prentza, Zoi / Chaligiannis, Ilias / Cecchinato, Mattia

Avian diseases

2017 Volume 61, Issue 3, Page(s) 409–413

Abstract: Avian metapneumovirus (aMPV) is considered a major pathogen for turkeys but its impact on chicken production is still partially neglected, even though it is fully acknowledged as a primary pathogen in chickens as well. The lack of structured diagnostic ... ...

Abstract	Avian metapneumovirus (aMPV) is considered a major pathogen for turkeys but its impact on chicken production is still partially neglected, even though it is fully acknowledged as a primary pathogen in chickens as well. The lack of structured diagnostic surveys does not allow a pervasive understanding of aMPV epidemiology. Being that aMPV is almost an everyday challenge for farmers and veterinarians, a more accurate report of its presence should be detailed, posing the basis for a deep and global epidemiologic analysis. With these premises, the present work aims to report the first detection and molecular characterization of aMPV subtype B field strains from unvaccinated chickens in Greece. The Greek strains appear to be phylogenetically related among each other and with other recent Mediterranean strains while being distant from the currently applied vaccines, thus stressing once more the necessity to evaluate aMPV diffusion and evolution.
Language	English
Publishing date	2017-09
Publishing country	United States
Document type	Journal Article
ZDB-ID	40871-2
ISSN	1938-4351 ; 0005-2086
ISSN (online)	1938-4351
ISSN	0005-2086
DOI	10.1637/11631-032017-CaseR
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Article ; Online: Molecular epidemiology of infectious bronchitis virus and avian metapneumovirus in Greece.

Andreopoulou, Marianna / Franzo, Giovanni / Tucciarone, Claudia M / Prentza, Zoi / Koutoulis, Konstantinos C / Cecchinato, Mattia / Chaligianni, Ilias

Poultry science

2019 Volume 98, Issue 11, Page(s) 5374–5384

Abstract: Respiratory diseases like infectious bronchitis virus (IBV) and avian metapneumovirus (aMPV) have been held accountable for major losses for poultry production. Nevertheless, scarce information was present dealing with the prevalence and molecular ... ...

Abstract	Respiratory diseases like infectious bronchitis virus (IBV) and avian metapneumovirus (aMPV) have been held accountable for major losses for poultry production. Nevertheless, scarce information was present dealing with the prevalence and molecular epidemiology of these infections in Greece and the efficacy of currently applied control strategies. To fill this gap, a specific epidemiological study was designed. A total of 106 broiler and layer farms, including 10 backyard and 96 commercial flocks, were sampled between March 2016 and May 2017, and the obtained tracheal swabs were tested for IBV and aMPV using RT-PCR based techniques followed by sequencing. For each farm, data regarding production type, flock features, clinical signs, and vaccination program were also recorded. Different associations between vaccination protocol, production type, animal category, birds density, age, presence of clinical signs, and IBV and/or aMPV infection were tested. Both IBV and aMPV field strain prevalence were proven high, approximately 20 and 30%, respectively, being the GI-19 lineage (14 out of 19; 73.6%) and B subtype (30 out of 30; 100%), the most commonly detected IBV and aMPV genetic types. Infection with IBV field strains was significantly associated with clinical sign presence (odds ratio = 8.55 [95CI = 2.17-42.90]). Remarkably, only the vaccination protocol involving a double vaccination at 1 D of age was proven protective against IBV-induced symptomatology, with the odds of developing disease being 4.14 [95CI = 1.34-14.51] times lower. No association was demonstrated between aMPV infection and clinical outbreaks or between aMPV and IBV detection, suggesting the marginal role of the former pathogen in poultry farming. Globally, the present study provides the first detailed investigation of the epidemiological scenario of 2 viruses traditionally considered of pivotal relevance in poultry farming and demonstrates that remarkable benefits could be obtained with just minor adjustments in vaccination protocols.
MeSH term(s)	Animals ; Chickens ; Coronavirus Infections/epidemiology ; Coronavirus Infections/prevention & control ; Coronavirus Infections/veterinary ; Coronavirus Infections/virology ; Greece/epidemiology ; Infectious bronchitis virus/genetics ; Infectious bronchitis virus/physiology ; Metapneumovirus/genetics ; Metapneumovirus/physiology ; Molecular Epidemiology ; Paramyxoviridae Infections/epidemiology ; Paramyxoviridae Infections/prevention & control ; Paramyxoviridae Infections/veterinary ; Paramyxoviridae Infections/virology ; Poultry Diseases/epidemiology ; Poultry Diseases/prevention & control ; Poultry Diseases/virology ; Prevalence ; Vaccination/veterinary
Keywords	covid19
Language	English
Publishing date	2019-07-02
Publishing country	England
Document type	Journal Article
ZDB-ID	242586-5
ISSN	1525-3171 ; 0032-5791
ISSN (online)	1525-3171
ISSN	0032-5791
DOI	10.3382/ps/pez360
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Article: Coxiella burnetii Shedding in Milk and Molecular Typing of Strains Infecting Dairy Cows in Greece

Pathogens. 2021 Mar. 03, v. 10, no. 3

2021

Abstract: Ruminants are considered the commonest animal reservoir for human infection of Coxiella burnetii, the Q fever causative agent. Considering the recently described importance of human Q fever in Greece, we aimed at providing the first comprehensive direct ... ...

Abstract	Ruminants are considered the commonest animal reservoir for human infection of Coxiella burnetii, the Q fever causative agent. Considering the recently described importance of human Q fever in Greece, we aimed at providing the first comprehensive direct evidence of C. burnetii in dairy cows in Greece, including the genetic characterization of strains. The 462 examined dairy farms represented all geographical areas of Greece. One bulk tank milk sample was collected from every farm and tested for the presence of C. burnetii. Molecular genotyping of strains, performed directly on samples, revealed the existence of two separate clades characterized by single nucleotide polymorphism (SNP) genotypes of type 1 and type 2. The two clades were clearly distinguished in multiple locus variable-number tandem repeat analysis (MLVA) by two discriminative loci: MS30 and MS28. Whereas MLVA profiles of SNP-type 2 clade were closely related to strains described in other European cattle populations, the MLVA profile observed within the SNP type 1 clade highlighted a peculiar genetic signature for Greece, related to genotypes found in sheep and goats in Europe. The shedding of C. burnetii bearing this genotype might have yet undefined human epidemiological consequences. Surveillance of the genetic distribution of C. burnetii from different sources is needed to fully understand the epidemiology of Q fever in Greece.
Keywords	Coxiella burnetii ; Q fever ; bulk milk ; epidemiology ; farms ; genotype ; human diseases ; humans ; loci ; milk ; monitoring ; sheep ; single nucleotide polymorphism ; tandem repeat sequences ; Greece
Language	English
Dates of publication	2021-0303
Publishing place	Multidisciplinary Digital Publishing Institute
Document type	Article
Note	NAL-light
ZDB-ID	2695572-6
ISSN	2076-0817
ISSN	2076-0817
DOI	10.3390/pathogens10030287
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Coxiella burnetii Shedding in Milk and Molecular Typing of Strains Infecting Dairy Cows in Greece

Emmanouil Kalaitzakis / Tiziano Fancello / Xavier Simons / Ilias Chaligiannis / Sara Tomaiuolo / Marianna Andreopoulou / Debora Petrone / Aikaterini Papapostolou / Nektarios D. Giadinis / Nikolaos Panousis / Marcella Mori

Pathogens, Vol 10, Iss 3, p

2021 Volume 287

Abstract: Ruminants are considered the commonest animal reservoir for human infection of Coxiella burnetii , the Q fever causative agent. Considering the recently described importance of human Q fever in Greece, we aimed at providing the first comprehensive direct ...

Abstract	Ruminants are considered the commonest animal reservoir for human infection of Coxiella burnetii , the Q fever causative agent. Considering the recently described importance of human Q fever in Greece, we aimed at providing the first comprehensive direct evidence of C. burnetii in dairy cows in Greece, including the genetic characterization of strains. The 462 examined dairy farms represented all geographical areas of Greece. One bulk tank milk sample was collected from every farm and tested for the presence of C. burnetii . Molecular genotyping of strains, performed directly on samples, revealed the existence of two separate clades characterized by single nucleotide polymorphism (SNP) genotypes of type 1 and type 2. The two clades were clearly distinguished in multiple locus variable-number tandem repeat analysis (MLVA) by two discriminative loci: MS30 and MS28. Whereas MLVA profiles of SNP-type 2 clade were closely related to strains described in other European cattle populations, the MLVA profile observed within the SNP type 1 clade highlighted a peculiar genetic signature for Greece, related to genotypes found in sheep and goats in Europe. The shedding of C. burnetii bearing this genotype might have yet undefined human epidemiological consequences. Surveillance of the genetic distribution of C. burnetii from different sources is needed to fully understand the epidemiology of Q fever in Greece.
Keywords	Coxiella burnetii ; Q fever ; genotyping ; epidemiology ; BTM ; Greece ; Medicine ; R
Subject code	630
Language	English
Publishing date	2021-03-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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