Survival of antibiotic resistant bacteria following artificial solar radiation of secondary wastewater effluent

Complete Genome Sequence of Stenotrophomonas maltophilia AB550, an Environmental Solar Radiation- and Multidrug-Resistant Strain Isolated in Western Australia

“… S. maltophilia strain AB550 was isolated from a wastewater treatment plant in Western Australia following treatment with artificial solar radiation. AB550 is resistant to multiple antibiotics, and previous draft genome sequencing indicated that it carries genes coding for predicted efflux pumps, beta-lactamases, and aminoglycoside-modifying enzymes ( 4 ).…”

Simple, fast and environmentally friendly method to determine ciprofloxacin in wastewater samples based on an impedimetric immunosensor

“…The main consequence reported is the appearance of multi-resistant bacteria. [2][3][4][5] This microbial resistance could be caused by the overuse of antibiotics in veterinary therapy or by the presence in the environment. Thus, antibiotics in the environment are considered as a major threat to human health and aquatic ora and fauna, even at the extremely low concentrations found in the environment, such as micrograms and nanograms per liter.…”

“…[6][7][8] Currently, there is great concern about multi-resistant bacteria occurring in wastewater treatment plants (WWTPs), since these units were not designed to remove ECs and provide an environment that is favorable for microorganism multiplication. 1,2,6,[9][10][11][12] It is known from the literature 2,13-17 that pharmaceutical compounds may be partially degraded (producing more toxic sub-products) or may remain unchanged during conventional treatment in WWTPs and then be released into water bodies. Within this perspective, ciprooxacin (CIP) has received great attention owing to its multi-resistant bacteria effect.…”

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“…Similar to what has been found in other wastewater surveys (Ahmed et al 2017;McLellan et al 2010), Pseudomonas was not only one of the common and dominant members here. This group is also known to tolerate and grow following UV treatment (Glady-Croue et al 2018;Hu et al 2016;Sullivan et al 2017), which has been attributed to UVinducible genes and UV-resistance plasmids that are often carried by members of this group (Hu et al 2016;Kokjohn & Miller 1994;Zhao et al 2018). The other groups we saw active following UV treatment have not been implicated in UV tolerance in wastewater disinfection previously, but based on their abundances in the effluent studied here as well as in other WWTPs (Shchegolkova et al 2016), their growth following UV treatment is notable.…”

“…In contrast, UV dose did not reduce the number of detectable tet gene types (tetracycline resistance) (Auerbach et al 2007) nor did UV disinfection contribute to significant reduction of tetracycline-and sulfonamide-resistant bacteria concentrations in a full scale WWTP (Munir et al 2011). More recently, several studies support these latter findings that UV disinfection does not reduce tetW genes and showed that it may actually increase the relative abundance of some ARGs and ARBs in effluent (Glady-Croue et al 2018;Guo et al 2013b;Hu et al 2016;Sullivan et al 2017). Our results support these mixed findings and provide additional insight by evaluating gene expression for several days after UV treatment: expression of tetW decreased immediately following UV exposure compared to untreated effluent, but tetW expression significantly increased in the river 48 hours after the UVtreated effluent addition as compared with the addition of non-UV treated effluent.…”