Search results for "Coccus"

Viridans streptococcal infective endocarditis associated with fixed orthodontic appliance managed surgically by mitral valve plasty

2018

Abstract Rationale: Streptococcus viridans, a heterogeneous group of alpha-hemolytic streptococci, is part of the normal flora of the mouth, usually responsible for dental caries (Streptococcus mutans, Streptococcus sanguinis), and pericoronitis, as well as for subacute infective endocarditis. They are responsible for 40-60% of the endocarditis cases occurring on the normal valves, especially in male patients and over 45 years of age. A change in the bacterial flora of the oral cavity is taking part after orthodontic fixed appliances are introduced into the oral cavity, change that is associated with an increased concentration of the acidogenic bacteria. Bacteraemia is the consequence of or…

Irregular Cytokine Pattern of CD4+T Lymphocytes in Response toStaphylococcus aureusin Patients with Wegener's Granulomatosis

1999

The initial stage of Wegener's Granulomatosis (WG) is often marked by symptoms of infection and it has been postulated that a bacterial infection could be the aetiologic factor of this disease. The objective of our work was to investigate T-cell-mediated immunity in WG by testing proliferative responses on bacterial antigens and particularly Staphylococcus aureus. We investigated the bulk proliferative response of peripheral blood lymphocytes (PBL) from patients with clinically active WG to gram-positive bacteria and purified proteinase 3 (PR-3), the major target antigen of c-ANCA. We generated S. aureus-specific PBL-derived T-cell lines and T-cell clones (TLC). In two WG patients 27 TLC we…

Meticilīnrezistento Staphylococcus intermedius grupas baktēriju identifikācija un izplatība suņiem Latvijā

2015

Meticilīnrezistentā Staphylococcus intermedius grupa (MRSI) ir galvenā rezistento patogēnu grupa mazajiem dzīvniekiem veterinārajā medicīnā. No gandrīz visām veterinārajām klīnikām pasaulē tiek ziņots par arvien vairāk pieaugošo rezistenci, īpašus draudus rada multirezistence. Meticilīna rezistenci nosaka mecA gēns, kas ir insertēts hromosomālā kasetē, pazīstamā kā stafilokoku hromosomālā kasete (staphylococcal chromosomal cassette – SCCmec). Darba mērķis ir identificēt meticilīnrezistentās S. intermedius grupas baktērijas Latvijā un noteikt to izplatību, kā arī optimizēt noteikšanas procedūru. Izmantojot skrīninga metodes, Brilliance MRSA2 agaru un Mannitol Salt agaru ar 2 mg/L cefoksitīnu…

mecA gēna noteikšana klīniskajos Staphylococcus aureus celmos

2017

Staphylococcus aureus ir viens no galvenajiem nozokomiālo infekciju izraisītājiem daudzās attīstītās pasaules valstīs. S.aureus samērā bieži ir meticilīnrezistents, tas nozīmē, ka tam ir rezistence pret visiem klasiskajiem beta laktāmu antibakteriālajiem līdzekļiem. Meticilīnrezistenci nosaka mecA gēns un tā integrācija baktērijas genomā. Baktēriju rezistences pieauguma dēļ būtiski ir noteikt atbilstošu antibakteriālo līdzekļu terapiju efektīvai ārstēšanai. Darba mērķis ir mecA gēna noteikšana klīniskajos Staphylococcus aureus celmos, kas iegūti no pacientiem, kuri ir ilgstoši uzturējušies veselības aprūpes iestādēs. Darbā tika izmantots GenoType® Staphylococcus tests, lai varētu noteikt me…

Meticilīnrezistentā Staphylococcus auresus biofilmu veidošanās in vitro noteikšana

2019

S. aureus izraisa vairākas slimības, kā rezultātā notiek dažādu organisma audu inficēšanās un tā saistītās slimības var būt gan vieglas, gan ļoti smagas un letālas. Pavisam nesen tika atzīmēts, ka baktēriju biofilmas var mazināt ādas brūču dzīšanu un mazināt lokālu antibakteriālo līdzekļu efektivitāti, ārstējot vai apstrādājot inficētās ādas brūces. Agrīna biofilmu atklāšana brūcēs ir būtiska, lai veiksmīgi ārstētu hroniskas brūces. Darba mērķis: Noteikt biofilmu veidojošo Staphylococcus aureus izolātu antibakteriālo rezistenci un apstiprināt rezistences gēna mecA klātbūtni šajos izolātos. Darba uzdevumi: Tiks veikta laboratorijā identificēto stafilokoku (n-48) jutības pārbaude pret antibak…

Methicillin-resistant Staphylococcus epidermidis and its distribution in healthy subjects

2016

Mūsdienās Staphylococcus epidermidis ir nozīmīgs oportūnistiskais patogēns. Tas ir viens no biežākajiem nozokomiālo infekciju izraisītājiem. Staphylococcus epidermidis celmu vidū plaši izplatīta ir rezistence pret antibakteriālajiem līdzekļiem. Maģistra darba mērķis bija izpētīt meticilīna rezistentā Staphylococcus epidermidis izplatību veseliem cilvēkiem. Meticilīna rezistentais Staphylococcus epidermidis netika konstatēts nevienā acs apakšējā plaksta konjunktīvā. Meticilīna rezistentais Staphylococcus epidermidis tika konstatēts 5 no 42 degunu nāšu paraugiem, kas sastāda 11.9% ± 5%. 1 no 5 meticilīna rezistentajiem Staphylococcus epidermidis paraugiem, kas sastāda 20.0% ± 17.9%, bija biop…

Novel marine invertebrate-derived antimicrobial peptides against staphylococcal biofilm

2009

Efficiency of Daphnia magna in removal of green microalgae cultivated in Nordic recirculating aquaculture system wastewater

2020

The increase of global aquaculture production has boosted the development of recirculating aquaculture systems not only because they reduce water use but also provide opportunities for waste management and the use of released nutrients. The dissolved nutrients can be efficiently removed from recirculating aquaculture system wastewater by microalgae, and microalgae can be harvested from the wastewater with low costs by zooplankton such as Daphnia. The purpose of this study was to evaluate the feasibility of using microalgae and Daphnia for bioremediation of recirculating aquaculture system wastewater in Nordic conditions. We evaluated the growth and filtration efficiency of the waterflea Dap…

Photoinduced changes in phytochromes studied by means of low temperature UV-Vis spectroscopy

2018

Phytochromes are a major family of red-light-sensing kinases that control diverse cellular functions in plants, bacteria and fungi. These proteins must relay structural signals from the sensory site over large distances to regulatory output domains. To accomplish this function, they undergo rather large structural changes from one state to another. The general aim of this work was to study these structural changes and possible protonation states of the photosensory core of the bacteriophytochrome from Deinococcus radiodurans in the intermediate states of the photoreaction, which became possible to observe under low temperatures. Moreover, it was interesting to investigate the role Serine272…

Prevalence of Pneumococcal Serotypes in Community-Acquired Pneumonia among Older Adults in Italy: A Multicenter Cohort Study

2022

Pneumococcal community-acquired pneumonia (CAP) is a leading cause of mortality. Following the introduction of pneumococcal conjugate vaccines (PCVs) in children, a decrease in the burden of the disease was reported. In parallel, an increase in non-vaccine serotypes was also noted. The objective of this study was to assess the current serotype-specific epidemiology of pneumococci among Italian older adults hospitalized for CAP. A prospective study was conducted between 2017 and 2020 in four Italian regions. Subjects aged ≥65 years hospitalized with confirmed CAP were tested for pneumococci using both pneumococcal urinary antigen and serotype-specific urine antigen tests able to identify all…