The Identification Of Bacterial Pathogens

Sepsis is both best known yet most poorly understood medical disorders [1]. Sepsis leads to shock, multiple organ failure and death if not recognized early and treated promptly [2]. It is a serious clinical condition that represents a patient’s response to infection and has a high mortality rate [3]. Sepsis remains the dominant challenge in the care of critically ill patients [4]. Up to 19 million cases of sepsis worldwide per annum is estimated. The true incidence is higher [1]. Sepsis is associated with a mortality rate of 25 - 30% and mortality due to septic shock is 50-85% [6-8]. Patients with sepsis requiring intensive care unit (ICU) admission had high rates of ICU and overall hospital mortality, ranging from 18 to 50% [9-12]. The most common sites of infection are

In order to diagnose this patient with this bacterium, I would place an order for a blood culture. Blood cultures are indicated in patients with sepsis, severe skin and soft tissue infections, or unstable vital signs; example massive organ failure. Blood cultures

For many years the identification of microorganisms has been important in the world of medicine. It is essential or correct disease diagnosis in patients and for proper treatment. Knowing the correct identity and characteristics of microorganism is crucial when disease outbreaks occur in populations, also knowing how humans can benefit from microorganisms is important; many can be used in making certain foods or antibiotics.

Septic shock is the leading cause of death for patients in intensive care units and is the final stage in a continuum of infectious and inflammatory processes. This continuum begins with bacteremia, which is the presence of bacteria in the blood. Normally the body’s immune system can fight off a localized infection caused by a small amount of bacteria in the blood and the person will remain asymptomatic. However, a hospitalized patient could be immunocompromised, have a

Unknown bacteria determined to be Alcaligenes faecalis because of its morphological, physiological and metabolic properties.

Sepsis is defined by the Surviving Sepsis Campaign (SSC) as “the presence (probable or documented) of infection together with systemic manifestations of infection” (Dellinger et al.,

This experiment was conducted to find the genus and species of an unknown bacteria prescribed by the lab teacher, which was unknown bacteria GA3 in my case. Identification of unknown bacteria techniques are used on an every day basis to figure out what type of bacteria it is and to find the best method of how to treat a patient with this bacteria (1). All five “I’s” of Microbiology were used in the testing for the unknown culture. Inoculation was used several times to put the unknown culture into agar plates or into biochemical test tubes. After Inoculation of these tubes or plates, they always were placed into the incubator for further growth and development. Isolation was used to make sure we got the correct bacteria we were testing for. After each further isolation, we gram stained the culture and inspected the culture under a microscope to further help in the identification process of the unknown bacteria. Multiple tests were done on the unknown culture to make sure we were confident in what kind of bacteria the unknown was.

There are many reasons for knowing the identity of microorganisms. The reasons range from knowing the causative agent of a disease in a patient, so as to know how it can be treated, to knowing the correct microorganism to be used for making certain foods or antibiotics. This study was done by applying all of the methods that have been learned so far in the microbiology laboratory class for the identification of unknown bacteria. The identification process can be completed with a series of deferential stains and biochemical tests. Creating a dichotomous key helps to limit the amount of biochemical tests done on an unknown organism and by observation

The first step to identifying the unknown bacteria residing on the blood agar plate sent in from Khokana was to do a Gram stain on it. This is an important first step because it dictates further testing that will be necessary to arrive at a final conclusive result. Viewing the fixed and stained slide under the microscope revealed round chains of bacteria in a purple color signaling Gram-positive streptococci. A catalase test was performed with no bubbling present indicating a negative result. This further confirmed the shape and arrangement seen under microscopy. With this mind, the coagulase test was not done, as it would be of no use since that specifies for staphylococcus, specifically for Staphylococcus aureus. For streptococcus, an examination of hemolysis was necessary at this point. Shifting attention back to the original blood agar plate, gamma hemolysis was noted, thus narrowing the field down to two choices left. The unknown bacteria was either Streptococcus bovis or Entercoccus faecalis. This also means the Optochin and Bacitracin sensitivity tests would not be needed as those pinpoint alpha- and

The identification of unknown organisms carries important ramifications that can be applied to many real world scenarios. In keeping with quality assurance beverages, food, cosmetics, and other products are frequently inspected for contaminants resulting from a presence of pathogenic bacteria. In medicine, a physician’s diagnosis and consequent treatment is largely determined from samples collected from infection sites that have been analyzed using microbial tests.

Different microbes can transmit and produce different types of diseases and infections. Having an unknown bacterium in the body can be a life and death situation. It is very important especially in the healthcare industry that providers are able to differentiate between organisms that are pathogenic and administer the appropriate treatment to their patients. Applying methods that were previously studied in lab, students must be able to isolate an unknown specimen by using laboratory techniques and biochemical tests.

In infants with early onset sepsis, an IV with antibiotics is started immediately, and could last as long as 3 weeks if bacteria are found in the blood or spinal fluid. Acyclovir, an antiviral med, is used in cases of infection that have been caused by exposure to the Herpes virus. For older infants whose labs values are normal but show symptoms, the treatment is close monitoring on outpatient basis.

Sepsis is a potentially fatal medical condition where the blood is overwhelmed by the presence of bacteria; activating the immune response and potentially causing organ dysfunction due to the disruption of homeostasis, tissue perfusion and limited oxygen supply. Systemic inflammatory response syndrome can be a key to the recognition of the illness. This condition can be treated with antibiotics intravenously or by draining the infected fluid. However, treating the infection with appropriate anti-microbial medication does not always cure the illness. Understanding the activation of inflammation, coagulation and fibrinolysis in the pathophysiology of sepsis, has allowed further research and development of therapeutic agents in its clinical

Sepsis is a debilitating, potentially life threatening condition that has become a big burden on the health system worldwide. Early recognition and aggressive timely treatment have proven to be life saving interventions. South Miami Hospital (SMH) aims to provide safe care to our community by implementing and utilizing evidence –based guidelines and protocols. According to research, early identification of patients presenting with signs and symptoms of sepsis is crucial to patients’ survival. In order to achieve this goal SMH Emergency Department (ED) implemented a triage sepsis-screening tool, an intervention that as evidenced by research helps to recognize patients at risk for developing sepsis or presenting with this devastating disease.

Lauria-Bartani (LB) medium Davis et al., (1980). It was used for bacterial growth. It consists of (gm/l): Trypton; 10.0 gm, Yeast extract; 5.0 gm and NaCl; 5.0 gm. For solid medium, Agar Agar; 20.0 gm was added.