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Tu WC, McManamen AM, Su X, Jeacopello I, Takezawa MG, Hieber DL, Hassan GW, Lee UN, Anana EV, Locknane MP, Stephenson MW, Shinkawa VAM, Wald ER, DeMuri GP, Adams K, Berthier E, Thongpang S, Theberge AB. At-home saliva sampling in healthy adults using CandyCollect, a lollipop-inspired device. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.14.524039. [PMID: 36711895 PMCID: PMC9882111 DOI: 10.1101/2023.01.14.524039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Respiratory infections are common in children, and there is a need for user-friendly collection methods. Here, we performed the first human subjects study using the CandyCollect device, a lollipop inspired saliva collection device. 1 We showed the CandyCollect device can be used to collect salivary bacteria from healthy adults using Streptococcus mutans and Staphylococcus aureus as proof-of-concept commensal bacteria. We enrolled healthy adults in a nationwide (USA) remote study in which participants were sent study packages containing CandyCollect devices and traditional commercially available oral swabs and spit tubes. Participants sampled themselves at home, completed usability and user preference surveys, and mailed the samples back to our laboratory for analysis by qPCR. Our results showed that for participants in which a given bacterium ( S. mutans or S. aureus ) was detected in one or both of the commercially available methods (oral swab and/or spit tubes), CandyCollect devices had a 100% concordance with the positive result (n=14 participants). Furthermore, the CandyCollect device was ranked the highest preference sampling method among the three sampling methods by 26 participants surveyed (combining survey results across two enrollment groups). We also showed that the CandyCollect device has a shelf life of up to 1 year at room temperature, a storage period that is convenient for clinics or patients to keep the CandyCollect device and use it any time. Taken together, we have demonstrated that the CandyCollect is a user-friendly saliva collection tool that has the potential to be incorporated into diagnostic assays in clinic visits and telemedicine. For Table of Contents Only
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Barger SD, Lininger MR, Trotter RT, Mbegbu M, Kyman S, Tucker-Morgan K, Wood C, Coyne B, Russakoff B, Ceniceros K, Padilla C, Maltinsky S, Pearson T. Cross-sectional study of the association of social relationship resources with Staphylococcus aureus colonization in naturally occurring social groups along the US/Mexico border. PLoS One 2023; 18:e0284400. [PMID: 37053196 PMCID: PMC10101449 DOI: 10.1371/journal.pone.0284400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 03/29/2023] [Indexed: 04/14/2023] Open
Abstract
Asymptomatic carriage of Staphylococcus aureus is a major risk factor for subsequent clinical infection. Diminishing returns from mitigation efforts emphasize the need to better understand colonization, spread, and transmission of this opportunistic pathogen. While contact with other people presents opportunities for pathogen exposure and transmission, diversity of social connections may be protective against pathogens such as the common cold. This study examined whether social relationship resources, including the amount and diversity of social contacts, are associated with S. aureus colonization. Participants were community members (N = 443; 68% Hispanic) in naturally occurring social groups in southwestern Arizona. Four types of social relationships and loneliness were assessed, and samples from the skin, nose and throat were obtained to ascertain S. aureus colonization. Overall S. aureus prevalence was 64.8%. Neither the amount nor the diversity of social contacts were associated with S. aureus colonization. The concurrent validity of the social relationship assessments was supported by their moderate intercorrelations and by their positive association with self-rated health. The results suggest that the association of social network diversity and susceptibility to the common cold does not extend to S. aureus colonization. Conversely, colonization prevalence was not higher among those with more social contacts. The latter pattern suggests that social transmission may be relatively infrequent or that more intimate forms of social interaction may drive transmission and colonization resulting in high community prevalence of S. aureus colonization. These data inform communicable disease control efforts.
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Affiliation(s)
- Steven D. Barger
- Department of Psychological Sciences, Northern Arizona University, Flagstaff, AZ, United States of America
| | - Monica R. Lininger
- Department of Physical Therapy and Athletic Training, Northern Arizona University, Flagstaff, AZ, United States of America
| | - Robert T. Trotter
- Center for Health Equity Research, Northern Arizona University, Flagstaff, AZ, United States of America
- Department of Anthropology, Northern Arizona University, Flagstaff, AZ, United States of America
| | - Mimi Mbegbu
- Pathogen & Microbiome Institute, Northern Arizona University, Flagstaff, AZ, United States of America
| | - Shari Kyman
- Pathogen & Microbiome Institute, Northern Arizona University, Flagstaff, AZ, United States of America
| | | | - Colin Wood
- Pathogen & Microbiome Institute, Northern Arizona University, Flagstaff, AZ, United States of America
| | - Briana Coyne
- Pathogen & Microbiome Institute, Northern Arizona University, Flagstaff, AZ, United States of America
| | - Benjamin Russakoff
- Pathogen & Microbiome Institute, Northern Arizona University, Flagstaff, AZ, United States of America
| | - Kathya Ceniceros
- Northern Arizona University, Yuma, Arizona, United States of America
| | - Cristina Padilla
- Northern Arizona University, Yuma, Arizona, United States of America
| | - Sara Maltinsky
- Pathogen & Microbiome Institute, Northern Arizona University, Flagstaff, AZ, United States of America
| | - Talima Pearson
- Center for Health Equity Research, Northern Arizona University, Flagstaff, AZ, United States of America
- Pathogen & Microbiome Institute, Northern Arizona University, Flagstaff, AZ, United States of America
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Sun R, Zou H, Zhang Y, Zhang X, Chen L, Lv R, Sheng R, Du T, Li Y, Wang H, Qi Y. Vancomycin recognition and induced-aggregation of the Au nanoparticles through freeze-thaw for foodborne pathogen Staphylococcus aureus detection. Anal Chim Acta 2022; 1190:339253. [PMID: 34857141 DOI: 10.1016/j.aca.2021.339253] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 10/31/2021] [Accepted: 11/03/2021] [Indexed: 11/24/2022]
Abstract
Infectious diseases caused by foodborne pathogens have become a serious public health problem. It is urgent to develop simple, rapid, and visual methods for pathogen detection. Herein, gold nanoparticles (AuNPs), aptamer and vancomycin (Van) based dual-recognition molecules and magnetic enrichment were combined to realize visual detection of Staphylococcus aureus (S. aureus). Initially, S. aureus was bounded to aptamer coupled Fe3O4 with high affinity and selectivity, which can achieve the separation and enrichment of S. aureus in complex sample matrix. Subsequently, the second recognition molecule, Van, was conjugated to S. aureus -Apt - Fe3O4. Finally, the unbound Van supernatant was dropped in AuNPs solution that induced the aggregation of the AuNPs through freeze-thaw. Firstly, it was found that AuNPs were stable in the presence of Van after a freeze-thaw cycle. A facile visual colorimetric detection of S. aureus was constructed with the linear range from 101 to 104 CFU/mL and the limit of detection (LOD) of 0.2 CFU/mL. By altering the aptamer, this method can be extended to the other Gram-positive bacteria. The proposed method has great potential applications in monitoring food contamination and infectious diseases.
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Affiliation(s)
- Ruimeng Sun
- School of Public Health, Jilin University, Changchun, Jilin, 130021, PR China
| | - Hangjin Zou
- School of Public Health, Jilin University, Changchun, Jilin, 130021, PR China
| | - Yang Zhang
- School of Public Health, Jilin University, Changchun, Jilin, 130021, PR China
| | - Xinming Zhang
- School of Public Health, Jilin University, Changchun, Jilin, 130021, PR China
| | - Lixia Chen
- School of Public Health, Jilin University, Changchun, Jilin, 130021, PR China
| | - Ruijuan Lv
- School of Public Health, Jilin University, Changchun, Jilin, 130021, PR China
| | - Rongtian Sheng
- School of Public Health, Jilin University, Changchun, Jilin, 130021, PR China
| | - Ting Du
- School of Public Health, Jilin University, Changchun, Jilin, 130021, PR China
| | - Yuhan Li
- School of Public Health, Jilin University, Changchun, Jilin, 130021, PR China
| | - Han Wang
- School of Public Health, Jilin University, Changchun, Jilin, 130021, PR China
| | - Yanfei Qi
- School of Public Health, Jilin University, Changchun, Jilin, 130021, PR China.
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