CULTURABLE BACTERIAL COMMUNITIES FROM THE SPOILED WALLS OF THE HERITAGE BUILDINGS

摘要

Microorganisms, such as bacteria, fungi, archaea and cyanobacteria, are capable of colonizing on surfaces of a wide range of materials and could cause the biodeterioration of these, particularly the walls of historical buildings exposed to changing environmental conditions, such as temperature, relative humidity, pH and sunlight. The deterioration of the walls of the heritage buildings constitutes a major problem. Five samples were collected from five different cavities inside the heritage building Wing C of '1 Decembrie 1918' University in Alba Iulia, during the spring of 2017. The bacterial community from these samples was investigated by microbial culture methods on nutrient agar. Culture-dependent method is commonly used to isolate and identify the composition of microbial communities, but generally only less than 1% of the whole population can be detected by these techniques. Despite this low percentage, our study revealed not only the prevalence of the colony forming units but also the presence of a high number of colonies for each sample. The aim of this study was to establish the colony forming units of microbial communities inhabiting the heritage building from Wing C of '1 Decembrie 1918' University in Alba Iulia. The investigation also included the microscopy features as the bacterial shapes.