Overview of research projects

Funding: Brigitte und Wolfram Gedek - Stiftung, 40.000 EUR

Project Details:
Enteropathogenic Bacillus cereus are responsible for a diarrhoeal type of food poisoning. In earlier studies, we could show that milk inhibits the toxic activity of B. cereus enterotoxins towards human colon epithelial cells. At this, caseins as well as lactoferrin seem to hinder the interaction between the single toxin components. In this project, the influence of lactoferrin on growth and enterotoxin production of different B. cereus isolates is tested at first. Strain-specific differences are made visible, as well as the influence of different lactoferrins and their derivatives. The molecular mechanisms underlying the enhanced enterotoxin production after lactoferrin exposure are investigated via RNA sequencing. It is further tested which genes are up- or downregulated under iron deficiency and especially after lactoferrin contact. This gives an overview on the transcriptional changes in the organism. The second point is the detailed investigation of the inhibiting effect of lactoferrin towards the B. cereus enterotoxins in cell culture systems. For this, different commercially available lactoferrin products and derivatives will be tested, as well as their impact on different B. cereus toxins such as haemolysin BL, the non-haemolytic enterotoxin, cytotoxic K and the emetic toxin cereulide. Finally, the issue of lactoferrin-sensing and motility (chemotaxis) of selected B. cereus strains will be investigated. Next to the general ability of active movement, it will be tested if lactoferrin has a repelling or attracting effect on a certain isolate.

Funding: Niedersächsisches Ministerium für Wissenschaft und Kultur, 49.500 EUR

Project Details:
Ergänzung der klassischen Lehre in Präsenz durch die Entwicklung digitaler, jederzeit verfügbarer Inhalte.

Funding: QS-Wissenschaftsfonds, 28.229 EUR

Project Details:
The core of the research project is to answer important questions regarding the spatiotemporal impact of restrictions due to the Covid 19 pandemic on the value chain of poultry meat production. Data from primary production, structural analyses as well as data on slaughter findings, reported zoonoses in the German population and restrictions due to the pandemic will be linked to derive significances and correlations. From this, important propositions are generated, which address and evaluate the resilience to massive interventions of the integrated process chains in global world trade.

In particular, the project will demonstrate whether the reduction in reported Campylobacter enteritis in the population during the pandemic was due to changes in the occurrence of the pathogen in primary production, process flows in slaughterhouses, changes in consumer behavior, or other factors. The restrictions of the Covid 19 pandemic are included in the synthesis of the results.

Project Details:
Frequencies of Glaesserella parasuis isolates resistant against various antimicrobial substances will be compared in the years 2006-2021

Results:

Wiencek I, Hartmann M, Merkel J, Trittmacher S, Kreienbrock L, Hennig-Pauka I. Temporal Patterns of Phenotypic Antimicrobial Resistance and Coinfecting Patho-gens in Glaesserella parasuis Strains Isolated from Diseased Swine in Germany from 2006 to 2021. Pathogens 2022; 11: 721. doi: 10.3389/fvets.2021.802570

Funding: SP Europäische Innovationspartnerschaften (Landwirtschaftskammer Niedersachsen), 89.794 EUR

Project Details:
In two pig farms in three subsequent nursery periods animal health data, daily weight gain and
treatments will be compared between two identical piglet rearing compartments. In one
compartment the drinking water pipes will be cleaned prior to arrival of piglets by an innovative
cleaning process. The cleaning process combines mechanical cleaning forces using a mobile
flushing device equipped with a constant pressure system, with a new chemical cleaning concept.
The cleaning substance is based on the synergistic interaction of vitamins, organic acids, metal
ions and detergents, each of which attacking different target structures of pathogens. The
process resulted in a strong antimicrobial efficacy and in destruction of extracellular nucleic acids
(e.g. genes coding for resistance against antimicrobials). The effectiveness of the cleaning
process will be verified by chemical and microbiological examination of water pipe deposits prior
to and after cleaning. The cost-effectiveness of the process will be evaluated by performance
data, expenditure of time and material costs.

Funding: Deutsche Bundesstiftung Umwelt, 81.585 EUR

Project Details:
The aim of this project is to implement a simple and effective process for water treatment in aquaculture and to reduce harmful emissions from fish farms. A denitrification process is used for this purpose, which is coupled with a membrane unit in order to eliminate solids such as bacteria, parasites and other microparticles and to increase the biomass concentration in the denitrification reactor.

Cooperation Partners:

AquaSchwarz GmbH

Universität Stuttgart

Fresh Völklingen GmbH

Blue Foot Membranes GmbH

Funding: Drittmittelprojekt, gefördert durch die Fritz-Ahrberg-Stiftung., 30.000 EUR

Project Details:
This research project will compare the meat quality of buffalo and conventionally raised cattle. Using different storage and cooking methods, the widespread perception of tough and difficult-to-prepare buffalo meat will be scientifically analyzed. In addition to the comparative characterization of basic meat properties such as pH and conductivity,
water holding capacity, nutritional values, collagen content and texture parameters, microbiological investigations and, in particular, a sensory evaluation of the two meat species will be carried out.

Project Details:
Im Rahmen dieser Studie im Zentrum für E-Learning, Didaktik und
Ausbildungsforschung der Stiftung Tierärztliche Hochschule Hannover soll die
aufgrund der COVID-19-Pandemie eingesetzte hybride Form der universitären Lehre
auf ihre Nachhaltigkeit und die Übertragbarkeit auf vergleichbare Situationen
untersucht und mit der Lehre in einer rein digitalen Form sowie der reinen
Präsenzlehre verglichen werden. Im Fokus dieser Arbeit stehen das Wintersemester
2020/2021 sowie das Sommersemester 2021. Die hybride Form wird hier als
Kombination aus Präsenz- und digitaler Lehre definiert.

Results:

Naundorf, Hannah (2022): Untersuchung der Hybridsemester-Lehre während der COVID-19-Pandemie an der Stiftung Tierärztliche Hochschule Hannover.

Project Details:
Im Rahmen dieser Studie werden zum einen die An- und Herausforderungen untersucht, mit denen sich die Studierenden im Übergang in das Hochschulleben konfrontiert sehen.
Dazu soll im Besonderen erfasst werden, welche Ansprüche speziell das Studium der Veterinärmedizin in dieser Phase stellt. Zum anderen werden die bereits bestehenden Angebote untersucht, die das selbstregulierte Lernen der Studierenden fördern. Zusätzlich wird in dieser Arbeit weiterer Bedarf der Studierenden bezüglich der institutionellen Hilfestellung insbesondere in diesem Studienabschnitt ermittelt.

Results:

Zintl, Jana (2022): Untersuchungen zum selbstregulierten Lernen in der Studieneingangsphase der Veterinärmedizin an der Tierärztlichen Hochschule Hannover. Online unter: https://elib.tiho-hannover.de/receive/tiho_mods_00007949

Project Details:
Kaninchen mit Schlappohren, sogenannte Widderkaninchen, erfreuen sich einer zunehmenden Beliebtheit. Durch die Schlappohren sind diese Kaninchen prädestiniert Otitiden zu entwickeln. Im Rahmen von vergleichenden Untersuchungen zu Ohrerkrankungen bei unterschiedlichen Kaninchenrassen (REUSCHEL, 2018) wurde auch eine Verkürzung der Schädel bei diesen Kaninchen festgestellt. Diese beginnende Brachyzephalie bei Heimtierkaninchen könnte eine zunehmende Bedeutung erlangen und sich ähnlich wie in der Kleintiermedizin (Hund und Katze) entwickeln. Daher untersucht das Projekt die Kopfform von Kaninchen anhand von Messungen an CT-Aufnahmen unterschiedlicher Kaninchenrassen im Vergleich zu Wildkaninchen. Außerdem sollen weitere anatomische Veränderungen, welche durch den verkürzten Kopf entstehen können, in Anlehnung an Erkenntnisse von brachyzephalen Hunden untersucht werden.