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El epitelio corneal es una importante barrera de defensa que impide el ingreso de una gran variedad de microorganismos. Cualquier alteración de la superficie ocular facilita la invasión bacteriana de la córnea. El germen más frecuentemente identificado es Staphylococcus aureus. Se presenta una paciente con enfermedad debida al virus de la inmunodeficiencia humana (VIH) con diagnóstico de sida, absceso corneal bilateral y lesiones cutáneas. S.aureus meticilino resistente se aisló en hemocultivos y en material obtenido por raspado de la córnea. El absceso corneal es una entidad poco frecuente en pacientes con infección por VIH y síndrome de inmunodeficiencia adquirida.
The corneal epithelium is an important defense barrier that prevents the entry of great variety of microorganisms. Any alteration of the ocular surface facilitates bacterial invasion of the cornea. The most frequently reported germ is Staphylococcus aureus. Here, we present a patient with a diagnosis of HIV/ AIDS disease, who developed bilateral corneal abscess and skin lesions. Methicillin-resistant Staphylococcus aureus was isolated from blood cultures and corneal scrapings. Corneal abscess is a rare entity in patients with HIV and acquired immunodeficiency syndrome
Subject(s)
Humans , Female , Middle Aged , AIDS Serodiagnosis , Eye Infections/therapy , Corneal Ulcer/classification , Ultrasonography , Cornea/surgery , Abscess/etiology , Eye ManifestationsABSTRACT
Objective: Chronicosteomyelitis isthe infectionand inflammation ofthe bone.Inappropriate useof antibiotics and multidrugresistancehas raised themorbidityand mortalityrate in chronic osteomyelitis. This studyaims to determine thebacterial profileand antimicrobial susceptibility patterns ofchronicosteomyelitis with special mention to various resistant mechanisms.Methods: The study is a prospective design.Hundred (100) clinicallydiagnosedcases of chronicosteomyelitis of allagegroupand both sex admitted in a tertiarycarehospital at centralIndia, in oneyearwereincluded. Samples likepus, sinus dischargeorexudates werecollectedasepticallyand sent for microbiologicalinvestigation. Antimicrobial susceptibilityof bacterial isolates tothe commonlyusedantibiotics was doneby using modifiedKirbyBauer discdiffusion method.Results:Theaerobicbacteriological studyof chronic osteomyelitis showedStaphylococcus aureus is being continued to be major etiologicalagent followed byPseudomonas aeruginosa and Staphylococcus epidermidis. Gram-positive isolates weresensitive to linezolid, teicoplanin while gram-negativeisolates weresensitive to colistin, ciprofloxacin in the majority. The diseaseoccurs mostlydueto traumatic injuries commonlyaffectingthe middleagegroup.In present study prevalenceof methicillin-resistant Staphylococci aureusand βLactamaseproducing (ESBL, Amp-C and MBL)gram-negativebacilliis found to beon the higher side.Conclusion: It has been the majorcauseof morbidityfor a longtime. The emergingmultidrug-resistant strain is a major concern forthe treatment.Identification ofcausativeisolates and usinga judicious selection ofantibiotics willhelp theclinician in startingtheempirical treatment accordinglywould limit themultidrug resistancestrains in the hospital as wellas the community
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Objective To investigate the homology of methicillin-resistant Stphylococcusaureus(MRSA)from the neonatal intensive care unit(NICU)of a children's hospital,and evaluate routes and preventive strategies of MRSA healthcare-associated infection(HAI). Methods MRSA strains from neonates and environment of NICU between October and December 2014 were collected,and strains were identified by VITEK-2 microbial analysis system and cefoxitin Kirby-Bauer method,homology of MRSA was analyzed by pulsed-field gel electrophoresis (PFGE ). Results A total of 6 MRSA strains were isolated from NICU between October and December 2014,3 of which (bed-58,70,and 100)were detected MRSA from specimens,MRSA were isolated from neonatal incubator and nurse (nasal swabs and hands)who cared for neonate at bed 58. 5 of 6 MRSA strains were homology,antimicrobial susceptibility testing result showed that No. 1-5 strains were resistant to clindamycin and amoxicillin/clavulanic acid,No. 6 strain was slightly different from No. 1-5 strains,No. 6 strain was susceptible to both clindamycin and amoxicillin/clavulanic acid. PFGE results showed that No. 1-5 strains were of the same type,No. 6 strain was a different type. Conclusion The main route of this MRSA transmission is contact transmission,especially through the hands of health care workers,identification and analysis of epidemic strains by PFGE technique is an effective measures to prevent HAI outbreak and perform epidemiological study.
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Objective To establish the method of identifying MRSA with Taqman-fluorescence quantitative PCR basing on mecA/nuc/fem B three gene combined detecting.Methods Taking the coagulase positive MRSA,which isolated from the clinical samples and confirmed by VITEK 2 compact microbial analyzer,as the research obj ect,designed mecA/nuc/fem B specific PCR primers and Taqman fluorescent probe by bio-software PrimerPremier 5 and Designer Beacon 7,FAM,HEX and ROX markers were used to label the fluorescent probe at 5’,and the end of 3’was labeled with BHQ1,detected by fluo-rescence quantitative PCR instrment.Results ①1 g/dl gel electrophoresis results showed that the primer’s specificity of mec A/nuc/fem B were good,and molecular weight of the amplification band consistent with the expected molecular weight and no non-specific amplification band.②Three genes were obtained specific amplification in a single tube single channel and single tube multiple channel detection in PCR,and the three gene amplification effect in a single tube single tube single chan-nel and multichannel PCR similar.Conclusion Successfully established a method of multi channel Taqman-probe fluores-cence quantitative PCR identification of MRSA,mec A/nuc/fem B combined detection can effectively differentiate coagulase negative and positive MRSA,improve the accuracy of identification.
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Staphylococcus aureus is one of the common cause of respiratory tract infections in children.Methi-cillin -resistant staphylococcusaureus was reported in 1 960s,then the resistance of other drugs were found in recent years,which leading to many problems in the clinical treatment.Clinician have to master the resistance trend and mechanism of this bacteria and decrease the speed of resistance as much as possible.
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Objective:To investigate the effects of the anti-TLR2 antibody blocking TLR2 signaling pathway on inflammatory response in Staphylococcus aureus pneumonia murine models.Methods: Sixty C57BL/6J mice were divided randomly into normal control,SA pneumonia,and anti-TLR2 antibody group,killed 3 and 8 days after inoculation respectively.Normal control mice inoculated sterile PBS intranasally ,SA pneumonia mice inoculated SA ,anti-TLR2 antibody group of mice injected with anti-TLR2 antibody by tail vein and then inoculated SA intranasally.At the predetermined point , the colony-forming units ( CFU ) of bacteria were higher , leukocytes and neutrophil percentage were counted in bronchoalveolar lavage fluid ( BALF ) , the concentrations of KC and IL-10 in BALF and serum were assayed by ELISA ,changes in pulmonary histopathology were observed with HE staining and TLR 2 expression was detected by immunohistochemical.Results:3 days after intranasal inoculation ,the concentrations of KC and IL-10 in BALF and serum was increased in SA pneumonia mice , pulmonary histopathology changes significantly in HE staining.Compared with SA pneumonia mice,the CFU of bacteria were higher,leukocytes count and neutrophil percentage ,the concentrations of KC in BALF and serum,as well as HE pathological scores were reduced significantly in anti-TLR2 antibody group mice ,while no significant difference in IL-10.8 days after intranasal inoculation , HE pathological scores of anti-TLR2 antibody group mice were significantly lower than SA pneumonia group mice ,the CFU of bacteria in BALF were not statistically different between those two groups.Conclusion:Anti-TLR2 antibody attenuates the production of inflammatory mediators and inflammatory cell infiltration in SA pneumonia mice .
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Objective To monitor Staphylococcus infection in a hospital,and trace the source of Staphylococcus isolated from infectious wound-related hospital environment by molecular analysis. Methods By combination of fluorescence quanti-tative polymerase chain reaction (FQ-PCR)and culture method,environmental specimens related to 5 patients with wound infection were taken and performed multilocus sequence and MecA gene typing analysis. Results A total of 71 environmen-tal specimens were taken,Staphylococcus accounted for 36.62% (n= 26),88.46% (23/26 )of which were MecA+ methi-cillin-resistant strains. 77.78% (7/9)of Staphylococcus aureus (S. aureus)and 95.00% (19/20)of coagulase negative Staphylococcus (CNS)were methicillin-resistant strains. Multilocus sequence analysis revealed that ST239 (n= 6)was the most common sequence type in S. aureus;Staphylococcal cassette chromosome mec (SCCmec)analysis showed that the ma-jor type of S. aureus was typeⅢ,and CNS were typeⅢandⅣ. Conclusion Staphylococcus is common in healthcare-associated infection,and most Staphylococcus are multidrug-resistant,continuous monitor on drug-resistant Staph-ylococcus is necessary,and risk of Staphylococcus variant to medical institutes need to be paid attention.
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The present study was focussed on production of novel antibiotics from Halophilic bacterial species in Marin drive Mumbai. Bacillus pumilus were isolated from soil and screened for the production of antibiotics by plate assay and then cultured in shake flask fermentation at 30ºC for further studies. The bioactive secondary metabolites producing bacterial isolates were studied for their ability to tolerate 3% NaCl. Identification of Bacillus pumilus strains was done by using biochemical test as well as 16S r-RNA sequencing method. Identification of antibiotics was done by column chromatography as well as thin layer chromatography. Antibiotics was found to be produced by three are bacterial and one are fungal pathogen strains against E-coli (ATCC#2939), Staphylococcus aureus (ATCC# 96), Pseudomonas aeruginosa (ATCC# 2488) and one are fungal pathogen strains against Candida albicans (ATCC# 227) proved to be resistant to antibiotics produced by Bacillus pumilus. The maximum production of antibiotics from Bacillus pumilus against E-coli, Staphylococcus aureus and Candida albicans. Maximum zones of inhibition were observed after 48 hours of incubation at 30ºC against E-coli, Staphylococcus aureus and Candida albicans. After that structural elucidation was done by using IR, MS and NMR spectroscopy respectively.
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ObjectiveTo explore the role of polymorpbonuclear leukocyte (PMN) in PantonValentine leucocidin (PVL)-induccd acute lung inflammation and injury. Methods Fifteen New Zealand rabbits were divided into 3 groups with five rabbits in each group.The controls were treated with pbosphate buffer solution (PBS),the rabbits with normal granulocyte in rPVL group were treated with endotracheal instillation of rPVL,the granulocytopenia rabbits in vincristine (VCR) +rPVL group were firstly treated with VCR,thcn with endotracheal instillation of rPVL.Nine hours after injection,the peripheral blood and bronchoalveolar lavage fluid (BALF) were collected for counting PMN.The lactate dehydrogenase (LDH) activity in BALF,lung permeability index (LPI),PMN apoptosis and necrosis and the release of reactive oxygen species (ROS)in BALF were measured.After the rabbits sacrificed,the lung tissue samples were collcctcd for dctcrmining wet/dry (W/D) ratio and histopathological examination.The comparison among groups was done by t test.ResultsThe PMN count in the peripheral blood was (2.69=0.34) × 10 mL in rPVL group,which was significantly lower than control group [(3.63 ± 0.38) × 105/mL] (t =4.12,P＜0.05).The PMN counts in BALF in control group,rPVL group and VCR+rPVL group were (0.57±0.01 ) ×106/mL,(3.01±0.02) × 106/mL and (0.10±0.02) × 106/mL,respectively; that in rPVL group was significantly higher than those in control group (t=254.39,P＜0.05).The LDH activity,LPI and W/D ratio in rPVL group were all significantly higher than control group,while those in VCR+rPVL group were not significantly different from control group.The PMN apoptosis rate and necrosis rate in VCR+rPVL groupwere (1.17±0.24)％ and (1.13±0.17)％,respectively.The releases of ROS (meanfluorescence intensity) in rPVL group,control group and VCR+rPVL group were 1.56±0.39,0.41±0.03 and 0.39±0.02,respectively,and that in rPVL group was significantly higher (t=6.58,P＜0.05).Histopathological examination of the lung showed the diffuse infiltration of inflammatory cells,hemorrhage and edema in rPVL group,wbile there was only thimbleful infiltration of inflammatory cells observed in surrounding bronchia and alveolar septun in VCR-rPVL group.ConclusionsrPVL can induce lung inflammation and injury in rabbits with normal granulocyte,but not in neutropenic rabbirs.Lung inflammation and injury may be the result of recruitment,aggregation and subsequent lysis and/or activation of PMN,which can damage the lung by releasing the contents of cytotoxic granules and/or reactive oxygen metabolites.
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O objetivo deste trabalho foi avaliar o padrão higiênico-sanitário de alimentos comercializados na Regiãode Londrina cadastrados no Ministério da Saúde, porém, dispensados de registro, conforme a RDC nº.23 da Agência Nacional de Vigilância Sanitária (ANVISA). Os alimentos foram escolhidos de acordo comas sugestões da Vigilância Sanitária de Londrina, PR, que levou em consideração o risco epidemiológico.Os padrões microbiológicos foram avaliados conforme a RDC nº. 12 da ANVISA. Contagens de E. colie S. aureus acima do permitido foram observadas respectivamente em 11 (18,3%) e 13 (21,6%) dos 60alimentos analisados. Os demais resultados microbiológicos estavam dentro do estabelecido pela RDCnº. 12. Ficou clara a necessidade de maior fiscalização do processamento e armazenagem de váriosalimentos analisados, em especial, sorvetes, massas recheadas, pães de queijo, lasanha, doces comcreme e salgados recheados. Esses resultados serão encaminhados às Vigilâncias Regional e Municipalalertando sobre a real potencialidade desses alimentos veicularem doenças e na intenção de abrir umadiscussão sobre a liberação ou não de registro desses alimentos junto ao Ministério da Saúde. Alémdisso, os resultados obtidos confirmam que a análise microbiológica do produto final é um instrumentoessencial de validação e verificação das Boas Práticas de Fabricação (BPF) e da Análise de Perigos ePontos Críticos de Controle (APPCC).
The aim of this study was to analyze the sanitary quality of foods commercialized in Londrina, Paraná that are exempt of Brazilian Health Ministry registration procedures, according to Resolution n°. 23 from the National Sanitary Administration Agency (ANVISA). The food categories analyzed were chosenaccording to ANVISA, Londrina, PR which took the epidemiological risk in account. Microbiologicalstandards were evaluated according to ANVISA Resolution n°. 12. Escherichia coli and coagulase positive Staphylococcus counts were above standards in 11 (18.3%) and 13 (21.6%) of food samples analyzed, respectively. The others microbiological results were in conformity to ANVISA Resolution n°.12. These results indicate inadequate sanitary conditions during food processing especially for ice-cream, stuffed pasta, "pães de queijo", lasanha, cream felled pastries, and "salgado recheado". The results could help the State and Local Sanitary Administration Agencies to evaluate the potentiality of these foods cause food-borne diseases and the adequacy of their liberation from Brazilian Health Ministry registration procedures. The results also show that microbiological analysis of the final product is a valuable validation and verification procedure for the GMP and HACCP system.