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Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 22 Nr. 2 (1981): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege

Anerkennung Ehrungen von Oskar Pusch, Dr. h. c. Karl Schumm, Alexander Stollenwerk, Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 12 Nr. 2 (1971): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege

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 apathogenic model strain of E. coli was used to test if oral phage application can prevent or reduce the gut colonization of extraintestinal pathogenic E. coli variants in two individual experiments. The E. coli strain E28 was used as a model strain, which could be differentiated from other E. coli strains colonizing the broiler gut, and was susceptible to all cocktail phages applied. In the first trial, a mixture of six phages was continuously applied via drinking water. No reduction of the model E. coli strain E28 occurred, but phage replication could be demonstrated. In the second trial, the applied mixture was limited to the four phages, which showed highest efficacy in vitro. E. coli colonization was reduced in this trial, but again, no reduction of the E. coli strain E28 was observed. The results of the trials presented here can improve the understanding of the effect of phages on single strains in the multi-strain microbiota of the chicken gut.

Among the organic acids, lauric acid has shown a high level of in vitro activity against Campylobacter jejuni. The prevalence and intensity of C. jejuni excretion at slaughter often becomes lower with increasing age. In higher-aged broilers on organic farms which often use other breeds, in turn, the prevalence of C. jejuni is sometimes higher at slaughter. The question then arises as to whether a diet with higher lauric acid concentrations, the age alone or the genetic breed might have an effect in the spread and intensity of an experimental C. jejuni infection in vivo. Therefore, two complete diets with or without 2% lauric acid from palm kernel fatty acids were offered to 450 chickens (ten subgroups à 15 birds, repetitions: n = 3) of two broiler and two layer breeds (Ross 308, Hubbard JA 757, Lohmann Dual and Lohmann Brown-Classic). All breeds were reared for 42 days, Lohmann Brown-Classic also for about 98 days. Twenty-one days before dissection, three seeder birds per subgroup were orally infected with a 1 mL inoculum of C. jejuni (4.46±0.35 log10 CFU/mL). Qualitative detection of C. jejuni in cloacal swabs was performed at days 2, 4, 7, 14 after inoculation and at dissection in all birds. Quantitative detection was performed on excreta samples of seeder birds at days 2, 11 and 17 after experimental challenge and on caecal samples of all birds at dissection. Two days after experimental inoculation, C. jejuni prevalence was higher in control birds without lauric acid supplementation (48.9% vs. 39.6%; P = 0.0462). Depending on age, two days after inoculation the C. jejuni prevalence in young Lohmann Brown-Classic chickens was significantly lower (37.8% vs. 61.1%) whereas at dissection it was higher (99% vs. 67%). At day 2 after inoculation C. jejuni counts in the excreta of young Lohmann Brown-Classic were lower in comparison to those in old ones (log10 CFU/g: 3.30±2.68 vs. 5.24±1.56). Eleven (log10 CFU/g: 5.14±1.13 vs. 4.16±0.82) and 17 days after inoculatioin (log10 CFU/g: 3.77±2.02 vs. 1.72±1.87) it was the reverse situation. At dissection, the carriage of C. jejuni in caecal content was higher in younger than in older birds (log10 CFU/g: 8.57±0.46 vs. 6.66±1.43). An effect of genetic breed on C. jejuni prevalence was seen at dissection, this being lowest in Lohmann Dual chickens (91% vs. 98.9% in other breeds). At d 17 after challenge, C. jejuni counts in the excreta of young Lohmann Brown-Classic were lower in comparison to Ross 308 and Hubbard JA 757 (log10 CFU/g: 3.77±2.02 vs. 5.21±0.85 and 5.62±0.90). Lohmann Dual chickens showed an intermediary excretion, this being only significant lower compared to Hubbard JA 757 (log10 CFU/g: 4.31±0.89). In summary, the effect of lauric acid is limited to the initial phase after experimental inoculation. A higher age at infection seems to lead to a more rapid limitation of the infection. The excretion of C. jejuni appears to decrease more rapidly in layer breeds than in broiler lines after experimental inoculation.

The application of cold atmospheric pressure plasma (CAP) for decontamination of sliced ready-to-eat (RTE) meat products (in this case, rolled fillets of ham), inoculated with Salmonella (S.) Typhimurium and Listeria (L.) monocytogenes was investigated. Cold atmospheric plasma (CAP) is an ionised gas that includes highly reactive species and ozone, interacting with cell membranes and DNA of bacteria. The mode of action of CAPs includes penetration and disruption of the outer cell membrane or intracellular destruction of DNA located in the cytoplasm. Inoculated ham was treated for 10 and 20 min with CAP generated by a surface-micro-discharge-plasma source using cost-effective ambient air as working gas with different humidity levels of 45-50 and 90%. The chosen plasma modes had a peak-to-peak voltage of 6.4 or 10 kV and a frequency of 2 and 10 kHz. Under the tested conditions, the direct effectiveness of CAP on microbial inactivation was limited. Although all treated samples showed significant reductions in the microbial load subsequent to plasma treatment, the maximum inactivation of S. Typhimurium was 1.14 lg steps after 20 min of CAP-treatment (p

Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 11, Nr. 2 (1970): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege

Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 10 Nr. 2 (1969): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege

Rezension zu: Das Land Baden-Württemberg. Amtliche Beschreibung nach Kreisen und Gemeinden Band II, Nordwürttemberg Teil I, herausgegeben von der Staatlichen Archivverwaltung Baden-Württemberg. Verlag W. Kohlhammer, Stuttgart, 1971, Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 14 Nr. 1 (1973): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege

Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 14 Nr. 1 (1973): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege

Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 14 Nr. 2 (1973): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege

Rezension zu: Denkmale in Thüringen. Ihre Erhaltung und Pflege in den Bezirken Erfurt, Gera und Suhl. Erarbeitet im Institut für Denkmalpflege, Arbeitsstelle Erfurt, Weimar (Hermann Böhlaus Nachfolger) 1973., Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 15, Nr. 1 (1974): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege

Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 16 Nr. 2 (1975): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege

Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 16 Nr. 1 (1975): Burgen und Schlösser. Zeitschrift für Burgenforschung und Denkmalpflege