Thekey differencebetweenPseudomonas aeruginosaandAlcaligenes fecalisis thatPseudomonas aeruginosais a beta-haemolytic encapsulated bacterium whileAlcaligenes fecalisis an alpha haemolytic non encapsulated bacterium.
Pseudomonas aeruginosaandAlcaligenes fecalisaregram negative, rod-shaped,aerobic bacteria. They belong to the phylum变形菌门.Pseudomonas aeruginosa属于假单胞菌科的家庭Alcaligenes fecalisbelongs to the family of Alcaligenaceae.P. aeruginosahas been identified as an opportunistic pathogen in both humans and plants. Though一个。fecalisis generally an opportunistic pathogen, it has been identified as a non-pathogenic bacterium that is commonly found in the environment.
CONTENTS
1.Overview and Key Difference
2.What is Pseudomonas Aeruginosa
3.What is Alcaligenes Fecalis
4.Similarities Between Pseudomonas Aeruginosa and Alcaligenes Fecalis
5.Side by Side Comparison – Pseudomonas Aeruginosa vs Alcaligenes Fecalis in Tabular Form
6.Summary
What isPseudomonas Aeruginosa?
Pseudomonas aeruginosais a gram-negative, rod-shaped, aerobic bacterium with unipolar motility. In certain instances, it becomes afacultative anaerobic. The identification ofP. aeruginosais often very complicated as individual isolates lack motility. Moreover, mutations in the gene calledlasRdrastically alter their colony morphology and ordinarily, leading to failure to hydrolyse gelatin or haemolyze. It has been identified as an opportunistic bacterium in both humans and plants. Sometimes in certain conditions,P. aeruginosacan secrete a variety of pigments such as pyocyanin (blue), pyoverdine (yellow and fluorescent), pyorubin (red), and pyomelanin (brown). These features can be used to identify this bacterium.P.aeruginosais clinically identified by its ability to produce both pyocyanin and fluorescein, as well as its ability to grow at 420C. This bacterium is capable of growing in diesel and jet fuels. It is also known as a hydrocarbon-using microorganism, causing microbial corrosion.
The genome ofP.aeruginosaconsists of a relatively large chromosome (5.5 – 6.8 Mb) with 5500 – 6000 open reading frames and plasmids of various sizes. This organism is popular for quorum sensing and biofilms formation. Moreover, this bacterium is resistant to a large range of antibiotics, including carbapenems, polymyxins, and recently tygecyclin.
P. aeruginosacauses urinary tract infections, respiratory tract infections, dermatitis, soft tissue infections, bacteraemia, bone and joint infections, gastrointestinal tart infections, and a variety of systematic infections. The antibiotics that may have an effect againstP. aeruginosainclude aminoglycosides, quinolones, cephalosporins, antipseudomonal penicillins and monobactams.
What isAlcaligenes Fecalis?
Alcaligenes fecalisis a gram-negative, rod-shaped bacterium found commonly in the environment. It was originally found in faeces. However, it is present in the soil, water, and environments in association with humans. This bacterium causes opportunistic infections. However, it is generally considered non-pathogenic. When opportunistic, it usually causes urinary tract infections.一个。fecalishas been used for the production of non-standard amino acids over the years.
This microorganism is oxidase and catalase positive. But it is negative for the nitrate reductase test.一个。fecalisgrows at 370C and forms colonies that lack pigmentation. Moreover,一个。fecalisdegrades urea, creating ammonia which increases the pH of the environment. Though一个。fecalisis considered to be alkali-tolerant, it maintains neutral pH in the cytosol to prevent damaging its macromolecules.一个。faecalisis normally resistant to aminoglycosides, chloramphenicol and tetracyclines. In any case, it is usually susceptible to trimethoprim, sulfamethoxazole and β-lactam antibiotics, including ureidopenicillins, ticarcillin–clavulanic acid, cephalosporins and carbapenems.
What are the Similarities BetweenPseudomonas AeruginosaandAlcaligenes Fecalis?
- Both bacteria belong to the phylum proteobacteria.
- They are gram-negative and rod-shaped bacteria.
- Both are aerobic.
- Moreover, they are opportunistic pathogens.
- They both are oxidase and catalase-positive.
- Both are motile bacteria.
What is the Difference BetweenPseudomonas AeruginosaandAlcaligenes Fecalis?
P. aeruginosais a beta-haemolytic encapsulated bacterium. In contrast,一个。fecalisis an alpha haemolytic non encapsulated bacterium. So, this is the key difference betweenPseudomonas AeruginosaandAlcaligenes Fecalis. In beta haemolysis, complete lysis of red blood cells and haemoglobin takes place, while in alpha haemolysis, partial breakdown of red blood cells happens, leaving a greenish colour.
Moreover, P. aeruginosais positive for the nitrate reduction test while一个。Fecalisis negative for the nitrate reduction test. Thus, this is another important difference betweenPseudomonas AeruginosaandAlcaligenes Fecalis.Furthermore,P. aeruginosais highly pathogenic while一个。fecalisis mainly non-pathogenic. Also,P. aruginosais unable to break down urea while一个。fecalisis able to break down urea.
The below infographic lists the differences betweenPseudomonas AeruginosaandAlcaligenes Fecalisin tabular form for side by side comparison.
Summary –Pseudomonas AeruginosavsAlcaligenes Fecalis
P. aeruginosaand一个。fecalisboth are gram negative, rod-shaped, and aerobic bacteria.P. aeruginosais a beta haemolytic encapsulated bacterium while一个。fecalisis an alpha haemolytic non encapsulated bacterium. Though they are both opportunistic,P. aeruginosais highly pathogenic, while一个。fecalisis mainly non-pathogenic. Biochemical tests such as urea hydrolysis test and nitrate reduction test can be used to differentiateP. aeruginosaand一个。fecalis.Thus, this summarizes the difference betweenPseudomonas AeruginosaandAlcaligenes Fecalis.
Reference:
1. “Pseudomonas Aeruginosa.” Wikipedia, Wikimedia Foundation, 1 Apr. 2021,Available here.
2. “Alcaligenes Faecalis.” Wikipedia, Wikimedia Foundation, 24 Feb. 2021,Available here.
Image Courtesy:
1. “Pseudomonas aeruginosa” ByMicrobe World(CC BY-NC-SA 2.0)viaFlickr
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