Culture-dependent (heterotrophic plate counts, counts of bacteria
resistant to oxytetracycline (OTCR) and doxycycline (DOXR), minimum inhibitory concentrations for oxytetracycline
and doxycycline, multidrug resistance of OTCR and DOXR, qualitative composition of OTCR
and DOXR, prevalence of tet genes in resistant isolates) and culture-independent surveys (quantity of
tet gene copies) revealed no significant differences in the abundance of antibiotic-resistant bacteria
and antibiotic resistance genes between the studied samples.