Unknown #380 was identified as Serratia liquefaciens and this information was received from the patient, Doris. This unknown is a part of the Serratia genus according to Brown’s Microbiological Application1, is a gram-negative rods that are usually found in the digestive tract.
The data was gathered by isolating the organism and various tests were carried out, and observations from scientific literature were used to affirm that the organism is S. liquefaciens. Most of the tests carried out included cultural characteristics tests, morphological, oxidative and fermentative reactions, hydrolytic and degradative reactions, and multiple test media. Different situations might have attributed to the lack of variability. First of all, after the …show more content…
The observations from the oxidative and fermentative reaction tests shows that S. liquefaciens is capable of fermenting glucose, and mannitol. The KIA media also approved these results due to the positive result observed for glucose fermentation as well as mannitol fermentation. The data gathered is consistent with the results for S. liquefaciens in comparison to another Serratia species such as S. fonticola or S. rubidaea, which are both positive for lactose fermentation, meaning that they can carry out lactose …show more content…
liquefaciens was expected to be positive1. Human error could have been the source of this discreptancy such as not following proper aspetic techniques, mistakes in creating in the medium, or using the wrong bacteria strain.
According to Brown1, S. liquefaciens tend to be found in adults’ respiratory and urinary tracts. S. liquefaciens are typically related to nosocomial infections which are usually a result of poor hygiene3. Although some strains are non-pathogenic, other strains do cause urinary tract infections. However, it is typically rare for an outbreak relating to S. liquefaciens to occur.
Doris has a history of urinary tract infection and S. liquefaciens is associated with urinary tract infections and most patients with S. liquefaciens urinary tract infections do not typically show symptoms. When they do, it can include fever, frequent urination, and dysuria4. Some risk factors for patients with Serratia urinary tract infections include diabetes mellitus, urinary tract obstruction, and renal failure4. Women are typically at risk of UTI because they have shorter urethra and once you get a UTI, reoccurring infections can take place. In the patient’s case, she has had previous history of UTIs and the bacteria from the recurrent infection may have traveled up the ureters and infected the kidneys and this is shown in the patient, Doris, history of
The data was gathered by isolating the organism and various tests were carried out, and observations from scientific literature were used to affirm that the organism is S. liquefaciens. Most of the tests carried out included cultural characteristics tests, morphological, oxidative and fermentative reactions, hydrolytic and degradative reactions, and multiple test media. Different situations might have attributed to the lack of variability. First of all, after the …show more content…
The observations from the oxidative and fermentative reaction tests shows that S. liquefaciens is capable of fermenting glucose, and mannitol. The KIA media also approved these results due to the positive result observed for glucose fermentation as well as mannitol fermentation. The data gathered is consistent with the results for S. liquefaciens in comparison to another Serratia species such as S. fonticola or S. rubidaea, which are both positive for lactose fermentation, meaning that they can carry out lactose …show more content…
liquefaciens was expected to be positive1. Human error could have been the source of this discreptancy such as not following proper aspetic techniques, mistakes in creating in the medium, or using the wrong bacteria strain.
According to Brown1, S. liquefaciens tend to be found in adults’ respiratory and urinary tracts. S. liquefaciens are typically related to nosocomial infections which are usually a result of poor hygiene3. Although some strains are non-pathogenic, other strains do cause urinary tract infections. However, it is typically rare for an outbreak relating to S. liquefaciens to occur.
Doris has a history of urinary tract infection and S. liquefaciens is associated with urinary tract infections and most patients with S. liquefaciens urinary tract infections do not typically show symptoms. When they do, it can include fever, frequent urination, and dysuria4. Some risk factors for patients with Serratia urinary tract infections include diabetes mellitus, urinary tract obstruction, and renal failure4. Women are typically at risk of UTI because they have shorter urethra and once you get a UTI, reoccurring infections can take place. In the patient’s case, she has had previous history of UTIs and the bacteria from the recurrent infection may have traveled up the ureters and infected the kidneys and this is shown in the patient, Doris, history of