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Septic states
Danielová, Edita ; Vejsová, Marcela (advisor) ; Konečná, Klára (referee)
Background: Septic states are serious conditions that endanger the patient's life. To prevent the patient's death, this condition must be diagnosed in time and appropriate treatment initiated. The aim of this work is to gather findings related to clinical and laboratory signs and diagnosis of sepsis, including recommended procedures, therapy and prevention of sepsis. Main findings: Septic states may have very different laboratory and clinical signs and criteria for the diagnosis are not yet clearly defined. Bacteria are one of the most common causes of septic states; sepsis requires immediate treatment. Bloodstream infections can be diagnosed in many ways, the basis is blood cultivation, but molecular methods have also been developed recently. Conclusions: Informations were found on the issue of septic states and their clinical and laboratory signs, diagnosis and the most common causes, diagnosis of bloodstream infections and recommended procedures in therapy and prevention. The research was mainly focused on laboratory signs of septic states and microbiological diagnosis of bloodstream infections. Keywords: sepsis, bloodstream infections, hemoculture
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Investigation of blood cultures
ŠINDELÁŘOVÁ, Radka
Bloodstream infections are among the most serious pathologies with often severe or even fatal course, and therefore the microbiological testing blood cultures is very important. Bloodstream infections caused by various microorganisms - bacteria, viruses, parasites and fungal agents. Each of them in the organism induces a different response and clinical course. The aim of this work was to ascertain the possibility of investigating bloodstream infections, appropriate the technique of treatment of blood cultures in the laboratory of bacteriology in České Budějovice Hospital, Inc. and based on the results determine the percentage of positivity for the months of September and October 2012 and which agents and with what frequency was from the positive blood cultures catched. The theoretical part deals with the explanation of basic concepts that are associated with bloodstream infections and their complications. I also explore the possibilities of investigation in other laboratory branches - biochemistry and hematology which are also very important for the diagnostics of this infections and their importance is especially in speed of obtaining results. The main examination is the clinical microbiology one where culturing agents that cause these diseases, the rapid identification and determination of susceptibility to antimicrobial agents leads to accelerated and targeted therapy. The last section of the theoretical part I dedicated to individual agents that can cause bloodstream infections. The practical part describes the procedure by which blood cultures were processed. At first, I describe the pre-analytical sample testing, which is very important. Here is included the sampling and sample transport to the laboratory. Medical personnel, which take the sampling, should be duly lessoned how to act during the sampling to avoid contamination of the sample, so the patient was not been needlessly prescribed antibiotics. The actual analysis of the examination were performed in blood cultures system the Bact/ALERT 3D bioMerieux, whose principle is based on the colorimetric detection of CO2, arising from the growth of bacteria. If the unit is assessed positively, blood cultures bottle was further processed - inoculated on solid media and microscopic specimen was taken. The research results are displayed using simple statistics in graphs and a chart. From the assignment of the percentage of positivity, that are depicted in the graphs, the result for the months of September and October of 2012 is 17%. Another objective was to determine the isolated agent. These results are in a chart where I put the number of their representation and their relative frequency. The most common were isolated: Escherichia coli, Staphylococcus epidermidis, Staphylococcus hominis, and Staphylococcus aureus. The results, which I reached in this work, are similar to the results in the international literature. The occurrence of Escherichia coli and coagulase-negative staphylococci is presented in the frequency of incidence of agents isolated from the blood cultures in the first place. During the isolation of coagulase-negative staphylococci should be considered their incidence as a possible contamination of the skin flora in case of the taking of blood cultures. During the practical part of the thesis I was closer acquaint with the operation of bacteriological laboratories and methods of its work including techniques of blood cultures processing. These activities are the necessary part of diagnostics of infectious diseases and treatment of the patient.
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