Avaliação laboratorial do sangue e da saliva de pacientes com doença renal crônica e manifestações orais: uma revisão sistemática / Laboratory evaluation of blood and saliva of patients with chronic kidney disease and oral manifestations: a systematic review

A cavidade oral é afetada pelo caráter multissistêmico das consequências da Doença Renal Crônica (DRC) e estima-se que cerca de 90% destes pacientes têm sintomas orais. Alterações laboratoriais sanguíneas e salivares são frequentemente observadas e por isso, investigações sobre correlações clínico-laboratoriais são fundamentais para o manejo e tratamento dos pacientes. Neste estudo foi realizada uma revisão sistemática para identificar e avaliar as principais alterações laboratoriais no sangue e na saliva de pacientes portadores de DRC que apresentam manifestações orais. A busca bibliográfica incluiu artigos das bases de dados eletrônicas PubMed, Scopus, Biblioteca Virtual em Saúde, Web of Science, Embase e literatura cinzenta, incluindo estudos caso-controle, transversais e de coorte. A análise do risco de viés seguiu a abordagem QUADAS-2. PROSPERO CRD42022250533 é o registro dessa revisão. As principais alterações laboratoriais encontradas foram o aumento das concentrações sanguíneas e salivares de ureia, creatinina, fosfato e diminuição das concentrações de cálcio e da taxa de fluxo salivar. As concentrações dessas substâncias no sangue e na saliva e a TGF estavam diretamente correlacionadas. Foi observada existência da correlação entre o aparecimento das manifestações orais e as alterações laboratoriais, principalmente xerostomia, disgeusia e hálito urêmico. Em conclusão, a literatura tem revelado que as principais alterações laboratoriais encontradas são aquelas descritas comumente na rotina laboratorial, que as concentrações dessas substâncias no sangue e na saliva estão diretamente correlacionadas com a TFG, e existe correlação entre o aparecimento das manifestações orais e as alterações laboratoriais. Grandes oportunidades estão abertas para a investigação sobre de novos marcadores.

The oral cavity is affected by the multisystemic nature of the consequences of Chronic Kidney Disease (CKD) and it is estimated that around 90% of these patients present oral symptoms. Blood and salivary laboratory changes are frequently observed and, therefore, investigations of clinical-laboratory correlations are essential for the management and treatment of these patients. This study was carried out as a systematic review to identify and evaluate the main laboratory changes in the blood and saliva of patients with CKD who present oral manifestations. The bibliographic search included articles from the electronic databases PubMed, Scopus, Virtual Health Library, Web of Science, Embase and gray literature, including case-control, cross-sectional and cohort studies. The risk of bias analysis advanced the QUADAS-2 approach. PROSPERO CRD42022250533 is the record of this review. The main laboratory changes found were an increase in blood and salivary concentrations of urea, creatinine, phosphate and a decrease in calcium concentrations and salivary flow. The concentrations of substances in blood and saliva and TGF were directly correlated. The existence of the manifestation was observed between the appearance of oral manifestations and laboratory changes, mainly xerostomia, dysgeusia and uremic breath. In conclusion, the literature revealed that the main laboratory changes found are those commonly described in laboratory routine, that the concentrations of these problems in blood and saliva are directly correlated with GFR, and there is a manifestation between the appearance of oral manifestations and laboratory changes. . Great opportunities are open for the investigation of new markers.

Prevalence of oxacillin-susceptible methicillin-resistant Staphylococcus aureus nasal carriage and their clonal diversity among patients attending public health-care facilities.

Context: Nosocomial infections arise from many microorganisms, including Staphylococcus aureus. Aims: The aim of this study is to determine the molecular epidemiology of circulating methicillin-resistant S. aureus (MRSA) clones among patients attending community and health-care facilities in Nova Friburgo, RJ, Brazil. Methods: A total of 1002 nasal swab samples were collected from May 2010 to September 2015. S. aureus isolates were identified through phenotypic tests, submitted to antimicrobial susceptibility tests and genotypic analysis to detect mecA, panton-valentine leucocidin (PVL) genes, SCCmec, SPA and multilocus sequencing typing (MLST) typing. Results: We identified 294 (29.3%) isolates as S. aureus and 91 (9.1%) as MRSA. A total of 17 isolates did not present a correlation between phenotypic and genotypic resistance profiles. Among MRSA isolates, 17 (18.7%) carried PVL genes. A total of 20 different SPA types were determined, being grouped by MLST into eight different sequence types. ST5/t002 was the most prevalent genotype found among these isolates. Conclusions: There is a gradual colonisation shift happening in the infection pattern by S. aureus in Brazil. The Brazilian Epidemic Clone (ST239-SCCmec IIIa-PVL-) seems to be substituted by isolates from different clonal complexes, such as ST5, ST8 and ST30. The non-correlation between phenotypic/genotypic resistance profile observed in some isolates suggests the presence of other methicillin resistance mechanisms different from mecA presence or a difference in the nucleotide sequence, which prevents the primers to identify the specific region during polymerase chain reaction reactions. MRSA identification should be based on phenotypic and genotypic testing to ensure the various types of resistance mechanisms.