Arne Jung

Arne Jung
University of Veterinary Medicine Hannover | TiHo · Klinik für Geflügel

Researcher, Veterinarian, Poultry Specialist

About

43
Publications
10,899
Reads
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528
Citations
Citations since 2016
28 Research Items
469 Citations
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
Introduction
My main research interests are bacterial diseases in poultry, especially Enterococcus cecorum infections in broiler chickens. Concerning Enterococcus cecorum, we are working on projects dealing with pathogenesis, epidemiology, immune reaction and treatment options.

Publications

Publications (43)
Article
Full-text available
Background Although Enterococcus cecorum (EC) infection is one of the most important bacterial diseases in modern broiler chickens today, many aspects of epidemiology and pathogenesis are still unknown. There is a need for better detection methods for EC than classical cultivation. In the present study, we describe the validation and application of...
Article
Enterococcus cecorum was initially identified as a harmless commensal of the gastrointestinal tract of chickens. However, over the past 15 yr, pathogenic strains of E. cecorum have become a significant cause of morbidity and mortality in broiler breeders, and repeated outbreaks occur, but an environmental reservoir for pathogenic E. cecorum has yet...
Article
Full-text available
Aims: Our aim was to analyse the survival of Enterococcus cecorum (EC) at various temperatures, relative air humidities and on different substrates commonly existing in broiler houses. Methods and results: A pathogenic EC isolate (EC14) was used to inoculate sterile litter, polyvinyl chloride (PVC) and dust samples. Incubation at 37, 25 or 15°C...
Article
Full-text available
In recent years, pathogenic strains of Enterococcus cecorum (EC) have emerged as a causing agent of septicemia and skeletal infection in broiler chickens with a high economic impact worldwide. Although research has been conducted, many aspects of the pathogenesis of the EC-associated disease are still unknown. In the present study, an experimental...
Article
Full-text available
The Common Eider (Somateria mollissima) inhabits the entire northern hemisphere. In northern Europe, the flyway population reaches from the southern Wadden Sea to the northern Baltic coast. The European population is classified as endangered due to declines in Common Eider numbers across Europe since 1990. In this study, we assessed 121 carcasses o...
Article
Avibacterium (Av.) gallinarum is an opportunistic pathogen in poultry, which, however, has also been associated with human disease. There is currently no approved method for antimicrobial susceptibility testing of this pathogen, so this study aimed at developing a harmonized broth microdilution method for Av. gallinarum that is suitable for diagnos...
Article
Full-text available
Background Enterococcus cecorum (EC) is one of the main reasons for skeletal disease in meat type chickens. Intervention strategies are still rare and focus mainly on early antibiotic treatment of the disease, although there are no data available concerning the effectivity of this procedure. The present study aimed to investigate the effectivity of...
Article
Objective: The available literature indicates a high prevalence of the zoonotic pathogen Salmonella (S.) enterica serovar Infantis in the common swift (Apus apus). This long-distance migrant, which only consumes aerial plankton, can reach high population densities in places with suitable breeding sites. Dedicated competent private persons take par...
Article
Full-text available
Aims: In response to a request from the Clinical and Laboratory Standards Institute (CLSI), the objective of this study was to develop a harmonized method for broth microdilution susceptibility testing of Bordetella (B.) avium, the major causative agent of infectious coryza in poultry. Methods and results: To find a suitable test medium, growth...
Article
Full-text available
Tropical shrimp, like Litopenaeus vannamei, in land-based recirculating aquaculture systems (RAS) are often kept at low water salinities to reduce costs for artificial sea salt and the amount of salty wastewater. Although these shrimp are tolerant against low salinities, innate immunity suppression and changes in the microbial composition in the wa...
Article
Enterococcus cecorum (EC) is known to cause skeletal lesions in broiler chickens and also systemic infections in Pekin ducks. Despite the importance of the pathogen, there is still a lack of serological diagnostic tools for the detection of EC infections. Here we describe the development of an in-house indirect enzyme-linked immunosorbent assay (EL...
Article
Full-text available
Among intestinal coliform microbes in the broiler gut, there are potentially pathogenic Escherichia (E.) coli that can cause avian colibacillosis. The treatment with antibiotics favors the selection of multidrug-resistant bacteria and an alternative to this treatment is urgently required. A chicken model of intestinal colonization with an apathogen...
Preprint
Enterococcus cecorum (EC) is known to cause skeletal lesions in broiler chickens and also systemic infections in Pekin ducks. Despite the importance of the pathogen, there is still a lack of serological diagnostic tools for the detection of EC infections. Here we describe the development of an in-house indirect enzyme-linked immunosorbent assay (EL...
Article
A grey-hooded parakeet (Psilopsiagon aymara) and two budgerigars (Melopsittacus undulatus) from different owners presented with decreased activity, vomitus, and diarrhea. A microscopic examination of feces showed trophozoites of the protozoan flagellate Giardia. A commercial immunochromatographic dipstick test for Giardia sp. antigens confirmed the...
Article
Bordetella avium (BA) is a respiratory pathogen of particular importance for turkeys. Specific adherence and damage to the respiratory epithelia are crucial steps of the pathogenesis, but knowledge about the mechanisms and the variety of virulence in field strains is limited. We analysed 17 BA field strains regarding their in vitro virulence-associ...
Preprint
Full-text available
Bordetella avium (BA) is a respiratory pathogen of particular importance for turkeys. Specific adherence and damage to the respiratory epithelia are crucial steps of the pathogenesis, but knowledge about the mechanisms and the variety of virulence in field strains is limited. We analysed 17 BA field strains regarding their in vitro virulence-associ...
Article
Orally applied MacroGard ® , a β-glucan, at a concentration of 1% led to a reduced bacterial diversity and higher amounts of facultative pathogenic bacteria in the gut of tinfoil barb (Barbus schwanenfeldii), whereas a concentration of 0.1% led to a higher diversity. Further work is now needed to confirm these interesting observations.
Article
Aeromonas spp. are ubiquitous in the aquatic environment, acting as facultative or obligate pathogens for fish. Identifying Aeromonas spp. is important for pathogenesis and prognosis in diagnostic cases but can be difficult because of their close relationship. Forty‐four already characterized isolates of Aeromonas spp. were analysed by 16S rRNA gen...
Article
Due to their pathogenic potential, identifying Vibrio species from recirculating aquaculture systems (RAS) for Pacific white shrimp (Litopennaeus vannamei) is of great importance to determine the risk for animal's as well as for the consumer's health. The present study compared identification results for a total of 93 Vibrio isolates, including typ...
Preprint
Full-text available
Enterococcus cecorum was initially identified as a harmless commensal of the gastrointestinal tract of chickens. However, over the past 15 years, pathogenic strains of E. cecorum have become a significant cause of morbidity and mortality in broiler breeder and broiler chickens around the world. The clinical picture of pathogenic E. cecorum infectio...
Article
The effect of dietary β-glucan on the bacterial community in the gut of common carp (Cyprinus carpio) was examined after oral application of Aeromonas hydrophila. Carp received either feed supplemented with 1% MacroGard®, a β-1,3/1,6-glucan, or a β-glucan-free diet. Fourteen days after feeding, half of the carp from each group were intubated with 1...
Article
Full-text available
The population of ring-necked pheasants (Phasianus colchicus) is decreasing all over Germany since the years 2008/2009. Besides impacts of habitat changes caused by current rates of land conversion, climatic influences or predators, a contribution of infectious pathogens needs also to be considered. Infectious and non-infectious diseases in free-li...
Article
Despite the importance of Bordetella avium (BA) as a respiratory pathogen of young turkeys, no infection model for the evaluation of BA-vaccine efficacy is available. The objective of this study was to evaluate the influence of route and dose of infection on the establishment of a BA-challenge model. In our first experiment, 28-day-old turkeys were...
Article
Shewanella spp. are Gram-negative, rod-shaped, motile bacteria that are widely distributed in marine and freshwater environments. The bacteria are present in the physiological microflora of fish from temperate waters and are known as fish spoilage species. From clinically healthy fish and from fish with skin ulcerations, Shewanella spp. is regularl...
Preprint
Full-text available
Despite the importance of Bordetella avium (BA) as a respiratory pathogen of young turkeys, no infection model for the evaluation of BA-vaccine efficacy is available. The objective of this study was to evaluate the influence of route and dose of infection on the establishment of a BA-challenge model. In our first experiment, 28-day-old turkeys were...
Article
Full-text available
Background Enterococcus cecorum (EC) infection currently is one of the most important bacterial diseases of modern broiler chickens but can also affect ducks or other avian species. However, little is known concerning pathogenesis of EC and most studies concentrate on examinations of EC strains from broilers only. The objective of this study was to...
Article
Infectious bursal disease (IBD) is an economically important disease affecting poultry production worldwide. Previous experimental studies indicated that IBD-live vaccination may induce transient immunosuppression leading to suboptimal vaccine responses and therefore insufficient protection against other pathogens. Layer pullets are commonly not on...
Article
Enteric redmouth disease (ERM), caused by Yersinia ruckeri, is among the most important infectious diseases in rainbow trout Oncorhynchus mykiss aquaculture in Europe. Our aim was to analyse the persistence of Y. ruckeri strains in trout farms in northwest Germany and their dissemination between farms based on a detailed molecular and phenotypical...
Article
β-glucans are immunomodulants that are used in fish nutrition for health improvement. The effect of MacroGard®, a commercially available β-1,3/1,6-glucan, on the bacterial community in the gut of common carp (Cyprinus carpio) was examined focusing on species diversity. Separate segments of the gut were analysed. We identified cultured bacteria isol...
Article
The colonization of the gastric ascomycetous yeast Macrorhabdus (M.) ornithogaster could be associated with a chronic wasting disease in several bird species in captivity. The prevalence and clinical relevance of M. ornithogaster in wild birds is unknown in detail. In the wintering season 2012/13 injured Eurasian Siskins (Carduelis spinus, n = 8) f...
Article
Full-text available
Background: Enterococcus cecorum is considered as an emerging pathogen in poultry and can cause substantial losses in broiler flocks. Femoral head necrosis and spondylitis were described as the main pathological changes in infected chickens. Nevertheless, little is known about the pathogenesis of Enterococcus cecorum infection in broilers. This re...
Article
Until now, Enterococcus cecorum (EC) has been known as a pathogen for broilers, broiler breeders, and Pekin ducks. In the present report, we describe a fatal systemic EC infection in a young racing pigeon (Columba livia forma domestica). EC was isolated from the heart, liver, spleen, and intestine of the bird in pure culture. In the pathologic exam...
Article
Full-text available
Over a seven-year period (2001-2007) flocks of four poultry species, 52 broiler flocks, 46 Pekin duck flocks, 22 Muscovy duck flocks, 20 turkey flocks, which were kept on the same farm, were continuously investigated for Campylobacter (C). Altogether 76.1% of the broiler flocks, 59.6% of the Pekin duck flocks, 68.2% of the Muscovy duck flocks and 9...
Article
Enteric Redmouth Disease (ERM), caused by Yersinia (Y.) ruckeri is one of the most important diseases in salmonid aquaculture. Outbreaks of ERM were controlled by vaccines directed against motile strains of the bacterium, until recently nonmotile vaccine-resistant strains evolved and caused severe outbreaks. Non-motile isolates were found widesprea...
Article
Full-text available
Enterococcus cecorum (EC) was thus far only known as a pathogen for broilers and broiler breeders. Recently there was evidence of EC field outbreaks in Pekin duck flocks in Germany. In this study we experimentally reproduced an EC infection in Pekin ducks. At 12 days post hatch, groups of Pekin ducks were infected orally, via the thoracic air sac o...
Article
Full-text available
Enteric Redmouth Disease (ERM), caused by Yersinia ruckeri, is one of the most important infectious diseases in rainbow trout (Oncorhynchus mykiss) aquaculture in Europe. More recently, non-motile vaccine resistant isolates appear to have evolved and are causing disease problems throughout Europe, including Germany. The aim of this study was to ana...
Article
This paper provides an overview of diseases caused by Bordetella avium, Gallibacterium anatis, Ornithobacterium rhinotracheale, Riemerella anatipestifer and Enterococcus cecorum in poultry flocks. These bacterial species are almost exclusively found in birds. Their identification with biochemical methods is described and alternative molecular biolo...
Article
This case report describes for the first time an outbreak of Gallibacterium anatis associated hepatitis in a laying hen flock. The main pathological and histological finding was a multifocal necrotizing hepatitis, which lead to 3.4 % mortality within one week. Additionally, an infection with Ascaridia galli was detected. Bacteriological identificat...
Article
To identify and characterize six chitinolytic bacterial strains isolated from ornamental fish. Six different isolates of Deefgea chitinilytica were detected in healthy as well as diseased ornamental fish in Germany over a period of 2 years. Bacterial strains were identified using 16S rRNA partial gene sequencing and further characterized using diff...
Article
This case report describes a Histomonas meleagridis infection in a German meat turkey flock. The flock consisted of 3090 turkey toms which were held in two separated compartments within one house. At 35 days of age, a necrotizing typhlitis was detected in the pathological examination of birds out of one compartment. Liver lesions could not be shown...
Article
Previous studies and field observations have suggested that genetic background influences infectious bursal disease virus (IBDV) pathogenesis. However, the influence of the virulence of the infecting IBDV strain and the mechanisms underlying the differences in susceptibility are not known. In the present study IBDV pathogenesis was compared between...
Article
An outbreak of avian paramyxovirus serotype 3 (APMV-3) infection occurred in a private bird collection consisting mainly of Neophema species. Two Bourke's parrots (Neopsephotus bourkii) and one red-crowned parakeet (Cyanoramphus novaezelandiae) were examined after developing torticollis and circling. The 3 birds were euthanatized and submitted for...

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