Aktuelle Themen

Aktuelle Themen

Aktuelle Themen


Luisa Weber, Diana Meemken
Aktuelle Gefahren durch Tierseuchen für die Lebensmittelkette Schweinefleisch­produktion – Erarbeitung von praktischen Handlungsanweisungen
Current hazards by notifiable animal diseases for the pork food chain – development of practical instructions

Aufgrund der aktuellen Tierseuchenlage hinsichtlich der Afrikanischen Schweinepest (ASP), welche sich seit 2014 sowohl in Wild- als auch Hausschweinebeständen in Polen, Litauen, Lettland, Estland und seit 2017 auch in Tschechien immer weiter Richtung Deutschland ausbreitet, besteht auf allen Stufen der Lebensmittelkette Schweinefleischerzeugung ein proaktiver Handlungsbedarf, um das Risiko einer Einschleppung nach Deutschland zu minimieren und um einen Eintrag in die deutschen Wild- und Hausschweinebestände zu verhindern. Das Tiergesundheitsgesetz stellt hierbei die Basis des präventiven Handlungsmanagements dar und regelt somit die Vorbeugung vor Tierseuchen und deren Bekämpfung (§1 TierGesG). Einen wichtigen Aspekt bei den Präventionsmaßnahmen stellt unter anderem die Reinigung und Desinfektion von Viehtransportfahrzeugen dar. Um Beispielszenarien sowie spezifische Lösungsansätze für einen möglichen Tierseuchenfall zu entwickeln, wurden neben dem Tiergesundheitsgesetz auch die Viehverkehrsverordnung, die Verordnung zum Schutz gegen die Klassische und Afrikanische Schweinepest sowie die Verordnung über die Maul- und Klauenseuche hinsichtlich der Wichtigkeit und Bedeutung für den Viehverkehr und den Schlachtunternehmen untersucht. Diese Studie soll der Übersichtlichkeit dienen, mögliche Verzahnungen zwischen den Rechtstexten herstellen und mögliche Optimierungsvorschläge aufzeigen.

Dominic A. Stoll, Natalie C. Stark, Biserka Becker, Sabine E. Kulling, Melanie Huch
Antibiotic susceptibility of Enterobacteria­ceae, isolated from sprouts, mixed salads and ready-to-eat salads in Germany
Antibiotika-Empfindlichkeit von Enterobacteriaceae isoliert aus Sprossen, Mischsalaten und „Ready-to-Eat“ Salaten in Deutschland

A collection of 109 Enterobacteriaceae isolates originating from sprouts, mixed ­salads and ready-to-eat salads bought in retail in south-western German super­markets from April 2015 to February 2016 have been phenotypically characterized and were tested for susceptibility to antibiotics, in particular extended-spectrum ß-lactamases. Only six isolates were found to be multi-resistant to three antibiotics substance groups (acylureidopenicillins, 3rd or 4th generation cephalosporins and ­fluorochinolones) namely four isolates belonging to Enterobacter spp. and two to ­Citrobacter spp. Therefore, the impact on the overall safety and quality of the ­surveyed German products can be regarded as inconspicuous in the light of antibiotic resistant Enterobacteriaceae.

Berit Wasenitz, Horst Karl, Harry W. Palm
Composition and quality attributes of fillets from different catfish species on the German market
Zusammensetzung und Qualitätsmerkmale von Filets verschiedener Welsarten auf dem deutschen Markt

The purpose of this study was to examine the chemical, physical, and sensory ­characteristics of fillets from four different catfish species on the German market to compare the nutritional properties and enjoyment values for the consumer. Furthermore, a systematic comparison of regionally produced versus imported catfish is still missing in this case, in Germany. Products of European catfish (Silurus glanis), ­African catfish (Clarias gariepinus), African catfish hybrid (Heterobranchus longifilis x Clarias gariepinus) distributed under the brand name Claresse® and Pangasius ­(Pangasianodon hypophthalmus) were analysed. Highest water content (85.0 %) was found in Pangasius. Corresponding protein (11.1 %) and lipid content (1.0 %) were significantly lower compared to the remaining catfish species. European catfish had the highest lipid content (8.2 %) and concentrations of ∑EPA + DHA in muscle meat (0.4 g/100 g) followed by African catfish, and Claresse®. African catfish was charac­terised by high selenium content (576.1 µg/kg wet weight). Physical properties were examined showing highest water binding capacity and cooking losses for fillets of European catfish. Sensory quality varied between the catfish species. Regionally ­produced African catfish and Claresse® from the Netherlands, both resulting from ­recirculating aquaculture systems, were preferred by panel members. Catfish fillets from these two species available in Germany can be classified as recommendable for human consumption due to its chemical and sensory properties as well as the beneficial EPA, and DHA contents in conjunction with the selenium concentrations in the muscle meat. Therefore, we are convinced that fillets from these catfish ­species have excellent nutritional properties.

Abdullah Öksüz, Ayse Özyilmaz, Gülsün Akdemir Evrendilek
Assessment of the freshness changes in ­lessepsian lizardfish (Saurida lessepsianus, n. sp.) during storage in ice
Bewertung der Frischeveränderungen bei Lessepsian Lizardfish (Saurida lessepsianus, n. Sp.) bei Eislagerung

Freshness changes in lessepsian lizardfish (Saurida lessepsianus, n. sp.) was investigated during ice storage of 18 days through chemical, microbiological, and sensory analyses. In contrast to K and related values, proposed Fri value decreased with the loss of freshness. Average K value was 6 % prime freshness soon after the catch, and reached to 30 % in limit of acceptability on 15th day. TVB-N value increased from 16.9 mg TVB-N 100 g–1 to 32 mg TVB-N 100 g–1 in spoiled fish on the 18th day. Initial pH value of the flesh was by beginning 6.46 and increased to 7.5 on the 18th day. Total microbial load was by beginning day 3.45 log cfu g–1 and had a very slow in­crease until the 5th day (4.49 log cfu g–1), and it reached 7.02 log cfu g–1 at the end of the storage period. The results of sensory scores agreed with those of chemical and microbiological analyses.