The effect of malathion on the activity, performance, and microbial ecology of activated sludge

Rauglas, Erik G; Martin, Seth; Bailey, Kandace; Magnuson, Matthew L.; Phillips, Rebecca; Harper, Willie F.

doi:10.1016/j.jenvman.2016.08.076

Cited by 9 publications

(5 citation statements)

References 22 publications

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“…Our studies found that S. oryzae and A. junii had the most significant changes in relative abundance after exposure to insecticides. Consistent with our results, Rauglas et al (2016), found that the abundance of Acidovorax also increased significantly after exposure to insecticides.…”

Section: Discussionsupporting

confidence: 93%

Differences in the intestinal microbiota between insecticide‐resistant and ‐sensitive Aedes albopictus based on full‐length 16S rRNA sequencing

et al. 2021

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Aedes albopictus is an important medical arthropod and the main vector of viruses such as dengue, Zika, and chikungunya. Dengue fever remains prevalent and outbreaks often occur in subtropical and temperate countries with around 390 million people being infected worldwide annually (Bhatt et al., 2013). To date, effective and safe vaccines have not been developed for the prevention and control of mosquito-borne viruses and the control of such viruses relies mainly on the suppression of mosquito vectors and chemical methods. Pyrethroid insecticides have been widely used for mosquito control owing to their insecticide efficacy and non-toxicity in mammals. However, the overuse and abuse of these insecticides have resulted in widespread resistance, thereby defeating the very purpose of vector prevention and mosquito control.Previous studies have indicated that symbiotic bacteria in insects, particularly in the gut, endow the host with improved adaptability to the environment (Tsuchida et al., 2014), enhanced immunity against external pathogenic microorganisms, and increased detoxification rates (Oliver et al., 2003;Vorburger & Rouchet, 2016). Symbiotic bacteria in the host gut induce the production of detoxification enzymes to develop common metabolism and mineralization processes that act to improve host resistance (Scates et al., 2019). Studies on agricultural pests showed that the presence of Burkholderia (Kikuchi et al., 2012) and

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Section: Discussionsupporting

confidence: 93%

Differences in the intestinal microbiota between insecticide‐resistant and ‐sensitive Aedes albopictus based on full‐length 16S rRNA sequencing

et al. 2021

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“…These differentially abundant bacterial taxa in pyrethroid-exposed larvae were not classified beyond the genus level. Nonetheless, bacteria belonging to the genera Bdellovibrio have been shown to decrease in abundance upon exposure to the insecticide malathion [49] but how they are affected by pyrethroid insecticide has not yet been described. Likewise, information is lacking on the effect of pyrethoids on Acidovorax .…”

Section: Discussionmentioning

confidence: 99%

Pyrethroid exposure alters internal and cuticle surface bacterial communities in Anopheles albimanus

et al. 2019

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A deeper understanding of the mechanisms underlying insecticide resistance is needed to mitigate its threat to malaria vector control. Following previously identified associations between mosquito microbiota and insecticide resistance, we demonstrate for the first time, the effects of pyrethroid exposure on the microbiota of F1 progeny of field-collected Anopheles albimanus. Larval and adult mosquitoes were exposed to the pyrethroids alphacypermethrin (only adults), permethrin, and deltamethrin. While there were no significant differences in bacterial composition between insecticide-resistant and insecticide-susceptible mosquitoes, bacterial composition between insecticide-exposed and non-exposed mosquitoes was significantly different for alphacypermethrin and permethrin exposure. Along with other bacterial taxa not identified to species, Pantoea agglomerans (a known insecticide-degrading bacterial species) and Pseudomonas fragi were more abundant in insecticide-exposed compared to non-exposed adults, demonstrating that insecticide exposure can alter mosquito bacterial communities. We also show for the first time that the cuticle surfaces of both larval and adult An. albimanus harbor more diverse bacterial communities than their internal microbial niches. Together, these findings demonstrate how insecticide pressure could be selecting for certain bacteria within mosquitoes, especially insecticide-metabolizing bacteria, thus potentially contributing to insecticide resistance.

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“…Two 2.0 L sequencing batch reactors (SBRs) were constructed and operated as described previously (Rauglas et al ., 2016). See the Supplement in the Appendix for more details.…”

Section: Methodsmentioning

confidence: 99%

“…Respirometry was carried out as described previously (Rauglas et al ., 2016). The respirometer (Columbus Instruments, Inc., Columbus, OH) consisted of a micro‐Oxymax‐BGM system sample pump, a sample drier, an oxygen sensor, a carbon dioxide sensor and two 10 port expansion interface units.…”

Section: Methodsmentioning

confidence: 99%

Functional resilience of activated sludge exposed toBacillus globigiiand bacteriophage MS2

Smith

Stuntz

Xing

et al. 2021

Water & Environment J

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This study evaluated the effect of two biocontaminant surrogates on the activity and performance of activated sludge. In the presence of bacteriophage MS2 at 3.2 × 108 PFU/ml, the peak respiration rates varied between 9.1 and 10.5 mg O2/gVSS/hr, generally similar to the rates observed in negative controls. MS2 did not alter the molar CO2‐produced‐to‐O2 consumed stoichiometry observed during respiration. Similar results were observed for Bacillus globigii (BG). Ethanol, a potential co‐contaminant associated with biocontamination incidents, can inhibit initial oxygen uptake. MS2 and BG both adsorbed to activated sludge; post‐exposure viability was confirmed for BG but not for MS2. This study is the first to evaluate the effects of BG and MS2 on activated sludge, and it presents a protocol that can be used in operational situations.

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The effect of malathion on the activity, performance, and microbial ecology of activated sludge

Cited by 9 publications

References 22 publications

Differences in the intestinal microbiota between insecticide‐resistant and ‐sensitive Aedes albopictus based on full‐length 16S rRNA sequencing

Differences in the intestinal microbiota between insecticide‐resistant and ‐sensitive Aedes albopictus based on full‐length 16S rRNA sequencing

Pyrethroid exposure alters internal and cuticle surface bacterial communities in Anopheles albimanus

Functional resilience of activated sludge exposed toBacillus globigiiand bacteriophage MS2

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