Skażenie mikrobiologiczne druków kazań pogrzebowych z lat 1601-1700 z kolekcji Biblioteki Fundacji Wiktora hr. Baworowskiego we Lwowie
Microbiological Contamination of Prints of Funeral Sermons From 1601–1700 from the Collection of the Library of the Count Wiktor Baworowski Foundation in Lviv

Summary/Abstract: The subject of the research undertaken in this article was a microbiological analysis of all 17th-century prints of funeral sermons (84 volumes) from the collection of the Library of the Count Wiktor Baworowski Foundation in Lviv. The analysis of the degree of microbiological hazard was performed on prints that were characterized by clear microbial activity, i.e. any dirt, numerous stains, discolouration or deformation of the paper. All collections were sampled for the presence of mould. An imprinting method was employed, using a sterile moist tissue paper disc with a diameter of 5 cm, which was imprinted in areas characterized by microbial activity. The collected sample was transferred to a Petri dish with nutrient solution according to the Czapek-Dox method. Samples prepared in this way were kept in an incubator at 28°C. The optimal time interval after which the mycelium would overgrow the entire dish was taken as 21 days. The microbial risk assessment tests carried out showed that in two cases the diameter of all tested volumes. Therefore, the presence of live mycelium in the examined material was established, and thus the object in question is classified for immediate conservation intervention. The remaining items require no interference. The microbiological risk assessment was supplemented by qualitative analysis of microorganisms.

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