## 4 Discussion
Molds of the genera _Penicillium_ and _Aspergillus_, which cause diseases of vegetables and fruits during storage, were the second group of fungal contaminations and represented 23.89% of microorganisms. It consisted of isolates obtained mainly from the roots of annual plants, which showed between 97.08% and 99.59% similarity in the _RPB2_ gene sequences with _P. _murcianum_, _P. _arizonense_, _P. _canscens_, and _P. _radiatolobatum_. The remaining isolates were obtained from all parts of the plants and identified as most similar to _P. _pulvillorum_, _P. _onobense_, _P. _corylophilum_, _P. _chrysogenum_, _P. _crustosum_, and _P. _subrubescens_. The isolates of _Aspergillus_, which showed the greatest similarity to _A. flavus_, _A. fumigatus_, _A. _versicolor_, _A. sydowii_, and _A. _creber_, were obtained from leaves and fruits. The fungi of both genera are very common in different climate zones and have been isolated from soil, rhizosphere, decaying organic matter, water, dust, damp building materials, and indoor environments [48; 49; 50; 51; 52]. They have also been found to be contaminants in cereal grains, frozen fruits, acid liquids, cheese, eggs, walnuts, and almonds [53; 54; 55; 56; 57]. Furthermore, _P. _crustosum_, as well as _A. flavus_, _A. _fumigatus_, and _A. _versicolor_, are known to be sources of bioactive secondary metabolites with neurotoxic, cytotoxic, mutagenic, teratogenic, and carcinogenic properties, as well as opportunistic pathogens that cause aspergillosis in immunosuppressed patients [56; 57; 58; 59; 60; 61]. Of the isolates tested, 33.81% were fungi found in various habitats around the world but not previously associated with American cranberry plants. This group included isolates of the genera _Alternaria_, _Apispora_, _Paraphoma_, _Didymella_, _Fusarium_, _Pestalotiopsis_, _Neopestalotiopsis_, and _Epicoccum_. The fungi detected in leaves and fruits had the greatest similarity to _P. _unicolor_ and _P. _scoparia_. Based on data from the literature, among members of this genus, _Pestalotiopsis sydowiana_ infected the leaves of American cranberries grown in Poland [15], while _Pestalotiopsis maculans_ was found in the shoots of plants grown in New Zealand [62]. In addition, individual isolates closely related to endophytic _A. Guangdongensis_ have been detected. This species has been described in asymptomatic leaves of _Wurfbinnia villosa_ in Guangdong province, China [63]. In leaf samples, isolates most similar to _A geophila_ and _A. _sencephalola_ were also found. These fungi cause tomato stem canker and potato leaf blight [64; 65]. According to the literature, _A. alternata_ was identified on the leaves of cranberry plants in a Krakow botanical garden [15]. The isolates obtained from the roots were found to be more similar to the species _P. radicina_, which had previously been detected in the roots of _Prunus cerasus_, _M. sylvestris_, _Picea obovata_, _Lycopersicon esculentum_, and _Medicago sativa_[66; 67], to the species _E. tritici_, which was described as pathogenic for _T. aestivum_[68], and to the species of _D. prosopidis_ identified in _Prosopis_ sp. in South Africa, _Narcissus tuzetta_ in Iran, and _Gastrolobium celsianum_ endemic in Australia [69; 70]. The roots of the tested plants were also contaminated with pathogenic microorganisms belonging to the _Fusarium oxysporum_ species complex. [PERSON] et al. [62] identified these fungi as one of the dominant pathogens in the shoots and roots of cranberry plants grown in New Zealand. [PERSON] et al. [11] isolated them from the twigs, leaves, and fruits of _V. axycocos_ grown in Lithuania. However, we have only found isolates closest to _F. foetens_, which have been described as pathogenic for _Begonia x hiemalis_ plants grown in greenhouses in several countries, including the Netherlands, the United States, Canada, Japan, Germany, France, Norway, and the Czech Republic [71]. In this study, only 7.19% of all isolates were identified as the most similar to the American cranberry pathogens described in the literature.