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Blood agar smooth; translucent; gray colonies that are 1-2 mmin diameter:Beta hemolyticCatalase positiveMotility umbrella- shapedEsculin = positiveH2S = negativeTre...

Question

Blood agar smooth; translucent; gray colonies that are 1-2 mmin diameter:Beta hemolyticCatalase positiveMotility umbrella- shapedEsculin = positiveH2S = negativeTreatment combination of ampicillin or penicillin with an aminoglycoside:Identify the Organism

Blood agar smooth; translucent; gray colonies that are 1-2 mmin diameter: Beta hemolytic Catalase positive Motility umbrella- shaped Esculin = positive H2S = negative Treatment combination of ampicillin or penicillin with an aminoglycoside: Identify the Organism



Answers

When hydrogen peroxide is placed on a colony of an unknown bacterium, bubbles form. Based on this information, you can conclude that the bacterium a) is Staphylococcus epidermidis. b) is a lactic acid bacterium. c) is beta-hemolytic. d) is catalase-positive. e) can cause strep throat.

Okay so for this question we want to identify a colony. And so the options first of all the options are a bacillus, be a stretch to see. Micro corpus the stuff, the carcass or e streptococcus. Just going to be one of these. What we know about the colony. Well let's make some notes and what they mean. So we know this is a cattle is negative colony and we know it is incubated aerobically. What else do we have? So that's the main two details. It's cattle is negative but it's incubated aerobically. What does this mean? What cattle is negative means for your colony is responding and aerobically. So is responding anaerobic click which combines with knowing that it's being incubated aerobically is actually a lot of information. There will be a lot of faculty. I've anne robes but typically if oxygen is present the bacteria will prefer to respond. Arab click. It's relatively rare that you can have something that tolerates there. It's zero tolerance but it will still prefer to us by an aerobically. In fact of these five examples, we have a baseless which is uh Eva and obligates arab or a faculty of an arab and then a stretch to micro carcass and staphylococcus are all faculty of anna robes so they won't die if you remove oxygen. If oxygen is present, they're going to use it. Which leaves our answer is being E. Streptococcus, which is one of the rare examples that when incubated aerobically will be cattle is negative. Have you have a main example to keep in mind is enterococcus. But since that's not an option here it will have to be streptococcus.

This question is about Staphylococcus aureus and its characteristics. So the options that were given for the answer of characteristics for staff arias are relating to graham status. Coagulate is production and cattle lays production for Graham status. We first need to think about our genera of bacteria and the Graham status for each of those. And if you've got those memorized, you'll know that staphylococcus is gram positive. However, the question is asking if it's gram negative, and since those don't match, that's not one of our answers. Next, we're gonna look at cattle ease production, and what you need to know is that staphylococcus is a cattle A's producing organism, so it's cattle A's positive, but the question is opposite that again and asking about cattle his negative. So that is not our answer, either. Then for coagulated status. This isn't the same across all staphylococcus species, so we need to think specifically about Staphylococcus aureus, and what you want to remember is that testing for staff artists can rely on coagulates status so it can either being positive or negative, and that's tested with a gluten ation testing, which in the case of staff arias results in a positive coagulate is test and so positive Coagulate Azour coagulates positive is the answer for the matching characteristic for staph aureus.

Hello, guys. Discussing addresses General characteristic of bacteria This microorganism are part of the kingdom. Manera and bacteria Domain material are precarious in additional to being single cell hetero traffic. All those are the only bacteria are narrow traffic and comprise the cell wall. Rich in peptide like him in additional bacteria camp very shape. They can be routing being the case of coconuts. They can be shaped like a stick being the case of basil. They can resemble the shape of a common, as is the case with the video among the others. More philologist in additional bacteria can be classified according to their car. When subjects to the Grand Mary do green positive bacteria heavy sell well composed only off to like him and stay well by the grand marrow, resulting in blue or violent standing grand negative bacteria, on the other hand, heavy sell well composed of the tiled like him, a layer of lipids and proteins joined to policy policy keratitis like policy keratitis and do not have solved the die well presence in a red color well, gas. That's for today. Good studies

Question. We have been after the bacteria. We does not take the gram stain. What do we call that type of bacteria. Soon before graham steaming we know that the sale of all or the cell of the bacterial cells have the health complex sell and we love which is composed of Australia that is like okay Alex followed by sand wall and then there in earlier of plasma membrane. Now these each layer of this bacterial cell envelope, it performed different functions but together act as a single protective unit. Now the cell envelope. Uh there are differences in the cell envelope of this bacteria which also uh differentiate them into two groups. That is grandpa, the Duke and gram negative. Now this the this differentiation of bacteria is done on the basis of the on the basis of how they respond to the staining procedures which was developed by Graham. That is gram staining. Now the bacteria which take off this grand stain they're referred to as the grand positive and we do not take the ground stain. They do not they're referred to us gram negative bacteria. So in the given question we have been all about the bacteria. They the bacteria has not taken the gram stain on the procedure. So what do we call that bacteria Now that bacterial we referred to as gram negative. So the correct option would the option B.


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