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Do cats mirror their owner? Paired exposure assessment using silicone bands to measure residential PAH exposure
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Researchers used silicone wristbands on cat owners and matching collars on their pet cats to measure residential PAH exposure, finding correlated polycyclic aromatic hydrocarbon levels between paired humans and cats, supporting the use of pets as sentinels for household chemical exposure.
It has been suggested that domestic animals can serve as sentinels for human exposures. In this study our objectives were to demonstrate that i) silicone collars can be used to measure environmental exposures of (domestic) animals, and that ii) domestic animals can be used as sentinels for human residential exposure. For this, we simultaneously measured polycyclic aromatic hydrocarbons (PAHs) using silicone bands worn by 30 pet cats (collar) and their owner (wristband). Collars and wristbands were worn for 7 days and analyzed via targeted Gas Chromatography-Mass Spectrometry (GC-MS). Demographics and daily routines were collected for humans and cats. Out of 16 PAHs, 9 were frequently detected (>50% of samples) in both wristbands and collars, of which Phenanthrene and Fluorene were detected in all samples. Concentrations of wristbands and collars were moderately correlated for these 9 PAHs (Median Spearman's r = 0.51 (range 0.16-0.68)). Determinants of PAH concentrations of cats and humans showed considerable overlap, with vacuum cleaning resulting in higher exposures and frequent changing of bed sheets in lower exposures. This study adds proof-of-principle data for the use of silicone collars to measure (domestic) animal exposure and shows that cats can be used as sentinels for human residential exposure.
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Pets, Genuine Tools in Detecting Environmental Pollutants. Sentinels and Biomonitors
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This review examines how pet dogs and cats serve as unintentional early-warning sentinels for human exposure to environmental pollutants, including microplastics. Because pets share our homes and have shorter lifespans, they develop pollutant-related diseases faster than humans do — making them valuable biomonitors for chemicals we are all being exposed to. The paper highlights that pets show elevated levels of flame retardants, perfluorochemicals, and other contaminants compared to their owners, underscoring shared household and environmental exposure risks.
Pets, Genuine Tools of Environmental Pollutant Detection
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This review highlights how pet dogs and cats can serve as early warning indicators of environmental pollutant exposure, since they share our living spaces but develop chronic health effects from contaminant exposure much faster than humans. Researchers found that comparing pollutant levels in pets and their owners can reveal exposure sources within the home environment. The study suggests that monitoring companion animals could help identify environmental health risks to people sooner.
Presence and characterization of microplastics in pet blood (dogs and cats): Evidence of environmental contamination
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Blood samples from 14 dogs and 6 cats all contained microplastics, with no significant differences found between the two species in amount, shape, color, or size. Researchers suggest blood could be a useful way to track microplastic exposure, and that pets might serve as indicators of environmental contamination affecting both animals and people.
Microplastics in Terrestrial Domestic Animals and Human Health: Implications for Food Security and Food Safety and Their Role as Sentinels
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This review examines how farm animals and pets are exposed to microplastics, and what that means for human health. Livestock can accumulate microplastics in their tissues during their lifetime and from processing equipment, meaning meat and dairy products may contain plastic particles. Pets like cats and dogs, who share our living spaces, could serve as early warning indicators for the levels of microplastic exposure that humans face at home.
Occurrence of azo-dyes, plasticizers, and PAH-bound microplastics: an emerging source and sink for hazardous compounds in indoor environments?
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Analysis of indoor dust found microplastics — predominantly polyamide fibers — adsorbing hazardous contaminants including PAHs, phthalates, and other organic micropollutants, with infants facing ingestion risks 22.5 times higher than adults. The study reveals that indoor microplastics function as both sources and sinks for toxic chemicals, creating concentrated exposure pathways in domestic environments where people spend most of their time.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.