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INTRODUCTION: This study aimed to estimate the prevalence of HBV infection and associated factors among prison inmates in Campo Grande, MS. METHODS: A total of 408 individuals were interviewed regarding sociodemographic characteristics, associated factors and HBV vaccination using a standardized questionnaire. Blood samples were collected from all participants and serological markers for HBV were detected by enzyme-linked immunosorbent assay. Hepatitis B surface antigen (HBsAg) and/or antibodies against hepatitis B core antigen (anti-HBc) positive samples were tested for HBV-DNA by polymerase chain reaction. RESULTS: The overall prevalence of HBV infection was 17.9% (95%CI: 14.4-22.0). The HBsAg carrier rate was 0.5%; 56 (13.7%) individuals had been infected and developed natural immunity and 15 (3.7%) were positive for anti-HBc only. Ninety eight (24%) prisoners had only anti-HBs, suggesting that they had low vaccine coverage. An occult HBV infection rate of 0% was verified among anti-HBc-positive individuals. Multivariate analysis of associated factors showed that age > 35 years-old, low schooling level and illicit drug use are significantly associated with HBV infection. CONCLUSIONS: Analysis of the data showed HBV infection prevalence similar or slightly lower than that reported in other of Brazilian prisons. Independent predictors of HBV infection in this population include older age, low schooling level and illicit drug use.

In [15], K. Igusa and G. Todorov introduced two functions φ and ψ, which are natural and important homological measures generalising the notion of the projective dimension. These Igusa-Todorov functions have become into a powerful tool to understand better the finitistic dimension conjecture.In this paper, for an artin R-algebra A and the Igusa-Todorov function φ, we characterise the φ-dimension of A in terms either of the bi-functors Ext i A (−, −) or Tor's bi-functors Tor A i (−, −). Furthermore, by using the first characterisation of the φ-dimension, we show that the finiteness of the φdimension of an artin algebra is invariant under derived equivalences. As an application of this result, we generalise the classical Bongartz's result [3, Corollary 1] as follows: For an artin algebra A, a tilting A-module T and the endomorphism algebra B = End A (T ) op , we have that φ dim (A) − pd T ≤ φ dim (B) ≤ φ dim (A) + pd T.

Currently, there is a constant search for new chemical compounds through plant extracts and phytochemical compounds that do not cause so many side effects in the oral cavity and that have good antimicrobial properties. Therefore, the present study evaluated the synergistic antimicrobial efficacy of mouthwashes containing thymol and carvacrol when compared with 0.12% chlorhexidine mouthwash after bilateral lower third molar extraction. Nineteen healthy (male and female) patients (n = 19) aged between 18 and 30 years, of both sexes, treated at the Faculty of Dentistry of Mato Grosso do Sul (UFMS, MS, Brazil) participated in this study. All patients were submitted to two different therapeutic treatments, divided into two groups: group 1 (control) - patient used 0.12% chlorhexidine mouthwash solution; group 2 (experimental) - patient used 0.05% thymol and 0.025% carvacrol solutions. The suture was removed at seven postoperative days and aseptically transferred to a tube containing sterile potassium buffer saline solution. Samples were submitted to microbiological analysis at the Microbiology Laboratory at UFMS. The mean and standard deviation of colony forming units/ml of isolate microorganisms in the suture grown in BHI agar obtained from the control and experimental groups were 4.766 x 106 ± 4.069 and 4.847 x 106 ± 3.971, respectively. In conclusion, the thymol and carvacrol based mouthwash showed antimicrobial effectivity in biofilm adherence of the silk thread after extraction of third molars.

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