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Phenotypic and genotypic characterization of clinically relevant bacteria isolated from dental waste and waste workers’ hands, mucosas and coats
Abstract
Infectious wastes are potential sources of pathogenic micro-organisms, which may represent a risk to the professionals who manage them. In this study, we aimed to characterize the infectious bacteria present in dental waste and waste workers. The dental waste produced over 24 h was collected and waste workers were sampled by swabbing. Isolate resistance profiles were characterized by Vitek ® and PCR and biofilm formation by Congo Red agar, string test and microtitre assay. To assess similarity between the waste and the workers' samples, a random amplified polymorphic DNA test was used. Twenty-eight bacteria were identified as clinically relevant. The most frequent gene was bla TEM present in five Gram-negative micro-organisms, and one bla SHV in Klebsiella pneumoniae. All Pseudomonas aeruginosa were positive to extracellular polymeric substances formation, except one isolated from a worker. Klebsiella pneumoniae had negative results for the string test. Pseudomonas aeruginosa showed better adherence at 25°C after 48 h of incubation and K. pneumonia had the best biofilm formation at the same temperature, after 24 h. The similarity between P. aeruginosa recovered from dental waste and from workers was low, however, it is important to note that a pathogen was found on a worker's hands and that improvements in biosafety are required. Significance and impact of the study Infectious dental waste can contain clinically relevant bacteria with important resistance and biofilm profiles…
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Microorganisms in waste may be transmitted to dogs and humans if the principles of biosafety measures are neglected.
“Microorganisms in waste may be transmitted to dogs (and humans) if the principles of biosafety measures are neglected (Tagliaferri et al., 2017).”
From Dog‐assisted therapy in the dental clinic. Part B. Hazards and assessment of potential risks to the health and safety of the dental therapy dog (2019) · cites this paper as Tagliaferri et al., 2017
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Sorted by citations
Gussgard, A. M., Weese, J. S., Hensten, A., & Jokstad, A. (2019) · Clinical and Experimental Dental Research · doi:10.1002/cre2.239 · Cited by 11
Metadata
- Authors
- Tagliaferri, T. L., Vieira, C. D., de Carvalho, M. A. R., Ladeira, L. C. D., Magalhães, P. P., de Macêdo Farias, L., & dos Santos, S. G.
- Affiliations
- Department of Microbiology; Institute of Biological Sciences; Universidade Federal de Minas Gerais (UFMG); Belo Horizonte Brazil
- Nuclear Technology Development Center (CDTN); Universidade Federal de Minas Gerais (UFMG); Belo Horizonte Brazil
- ORCID
- dos Santos, S.G.
- Venue
- Letters in Applied Microbiology
- Publisher
- Oxford University Press (OUP)
- Published
- 2017-08-20
- Volume
- 65
- Issue
- 4
- Pages
- 306-312
- ISSN
- 0266-8254
- Cited by
- 3
- References
- 1
- Language
- en
- Licence
- Funders
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Fundação de Amparo à Pesquisa do Estado de Minas Gerais
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
- Pró-Reitoria de Pesquisa, Universidade Federal de Minas Gerais
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