Count, identification and antimicrobial susceptibility of bacteria recovered from dental solid waste in Brazil

Vieira, Chrystiany Plácido de Brito; Carvalho, Maria Auxiliadora Roque de; Cussiol, Noil Amorim de Menezes; Alvarez-Leite, Maria Eugênia; Santos, Simone Gonçalves dos; Gomes, Renata Maria da Fonseca; Silva, Marcos Xavier; Nicoli, Jacques R.; Farias, Luiz de Mácêdo

doi:10.1016/j.wasman.2010.12.016

Cited by 16 publications

(18 citation statements)

References 21 publications

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“…There are some studies focusing on hospital and dental waste, although very few discuss specific aspects such as their potential biological risks, specially their fungi content. Previous results of our group (Vieira et al., , ) and other studies (Madsen, Alwan, Ørberg, Uhrbrand, & Jørgensen, ) proved the presence of different species of viable bacteria and also of some yeast inside biomedical waste. To widen the discussion on the possible risks to waste workers, this study proposed to investigate fungal strains recovered from dental waste, comparing with those samples isolated from waste workers' tissues (hands and nasal mucosa) and their work wear.…”

Section: Introductionsupporting

confidence: 67%

Investigating cross‐contamination by yeast strains from dental solid waste to waste‐handling workers by DNA sequencing

et al. 2017

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Trying to widen the discussion on the risks associated with dental waste, this study proposed to investigate and genetically compare yeast isolates recovered from dental solid waste and waste workers. Three samples were collected from workers' hands, nasal mucosa, and professional clothing (days 0, 30, and 180), and two from dental waste (days 0 and 180). Slide culture, microscopy, antifungal drug susceptibility, intersimple sequence repeat analysis, and amplification and sequencing of internal transcribed spacer regions were performed. Yeast strains were recovered from all waste workers' sites, including professional clothes, and from waste. Antifungal susceptibility testing demonstrated that some yeast recovered from employees and waste exhibited nonsusceptible profiles. The dendrogram demonstrated the presence of three major clusters based on similarity matrix and UPGMA grouping method. Two branches displayed 100% similarity: three strains of Candida guilliermondii isolated from different employees, working in opposite work shifts, and from diverse sites grouped in one part of branch 1 and cluster 3 that included two samples of Candida albicans recovered from waste and the hand of one waste worker. The results suggested the possibility of cross‐contamination from dental waste to waste workers and reinforce the need of training programs focused on better waste management routines.

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Section: Introductionsupporting

confidence: 67%

Investigating cross‐contamination by yeast strains from dental solid waste to waste‐handling workers by DNA sequencing

et al. 2017

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“…in clinical waste. Vieira et al [23] detected various types bacterial agents in dental waste including Enterobacter spp., Salmonella spp., Klebsiella spp., Pseudomonas spp., Serratia spp., Proteus mirabilis , Escherichia spp., Staphylococcus spp., Enterococcus spp. and Streptococcus spp.…”

Section: Resultsmentioning

confidence: 99%

Infectious Risk Assessment of Unsafe Handling Practices and Management of Clinical Solid Waste

Hossain

Rahman

Balakrishnan

et al. 2013

IJERPH

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The present study was undertaken to determine the bacterial agents present in various clinical solid wastes, general waste and clinical sharp waste. The waste was collected from different wards/units in a healthcare facility in Penang Island, Malaysia. The presence of bacterial agents in clinical and general waste was determined using the conventional bacteria identification methods. Several pathogenic bacteria including opportunistic bacterial agent such as Pseudomonas aeruginosa, Salmonella spp., Klebsiella pneumoniae, Serratia marcescens, Acinetobacter baumannii, Staphylococcus aureus, Staphylococcus epidermidis, Enterococcus faecalis, Streptococcus pyogenes were detected in clinical solid wastes. The presence of specific pathogenic bacterial strains in clinical sharp waste was determined using 16s rDNA analysis. In this study, several nosocomial pathogenic bacteria strains of Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis, Lysinibacillus sphaericus, Serratia marcescens, and Staphylococcus aureus were detected in clinical sharp waste. The present study suggests that waste generated from healthcare facilities should be sterilized at the point of generation in order to eliminate nosocomial infections from the general waste or either of the clinical wastes.

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“…The reported recovery of S. paucimobilis and S. maltophilia from the same biofilm (39) suggests that gene transfer is possible between these organisms. A recent report of dental solid waste harboring S. maltophilia (347) raises new questions about the viability and persistence of this opportunistic pathogen and whether DNA transfer from this organism can increase the potential pathogenicity and virulence of other microorganisms.…”

Section: Molecular Ecology and Stenotrophomonas Infection Gene Transfmentioning

confidence: 99%

Stenotrophomonas maltophilia: an Emerging Global Opportunistic Pathogen

2012

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SUMMARY Stenotrophomonas maltophilia is an emerging multidrug-resistant global opportunistic pathogen. The increasing incidence of nosocomial and community-acquired S. maltophilia infections is of particular concern for immunocompromised individuals, as this bacterial pathogen is associated with a significant fatality/case ratio. S. maltophilia is an environmental bacterium found in aqueous habitats, including plant rhizospheres, animals, foods, and water sources. Infections of S. maltophilia can occur in a range of organs and tissues; the organism is commonly found in respiratory tract infections. This review summarizes the current literature and presents S. maltophilia as an organism with various molecular mechanisms used for colonization and infection. S. maltophilia can be recovered from polymicrobial infections, most notably from the respiratory tract of cystic fibrosis patients, as a cocolonizer with Pseudomonas aeruginosa . Recent evidence of cell-cell communication between these pathogens has implications for the development of novel pharmacological therapies. Animal models of S. maltophilia infection have provided useful information about the type of host immune response induced by this opportunistic pathogen. Current and emerging treatments for patients infected with S. maltophilia are discussed.

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Count, identification and antimicrobial susceptibility of bacteria recovered from dental solid waste in Brazil

Cited by 16 publications

References 21 publications

Investigating cross‐contamination by yeast strains from dental solid waste to waste‐handling workers by DNA sequencing

Investigating cross‐contamination by yeast strains from dental solid waste to waste‐handling workers by DNA sequencing

Infectious Risk Assessment of Unsafe Handling Practices and Management of Clinical Solid Waste

Stenotrophomonas maltophilia: an Emerging Global Opportunistic Pathogen

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