![]() ![]() With a positive sign and a negative sign. We call that Gram positive, whereas if it stains pink, the bacteria is called Gram negative. Stained with something else, it turns pink. And if it stains well, it stains purple, and if it gets washed off and Much about the color yet, and this color comes from a special stain called the Gram stain, and it basically stains the So now we know about the three main shapes that bacteria can take, but we haven't talked too Is called a spirochete, and the plural version is spirilla. And a single rod is called a bacillus, whereas a bunch of themĪre called bacilli. So the single version of this is coccus, or a bunch of them are called cocci. Out rod-looking shape, and in the third row it kind See that they're round, and that's a sphere,Īnd in the second row, it looks more like a stretched Let's go over that quickly one more time, before we get into the official Just basically know that because these don't stain the same way, they have to be viewed differently, and the best thing I canĬall this is a squiggle, and I hope that makes sense. It's called dark field microscopy, but don't worry too much about the name. Using a light microscope for the top view, I'm This kind of stretched out oval-looking shape or a rod. So I'm just going to draw a circle here, and in the second row I can see that they're more stretched outĪnd kind of like a rod. Like little circles, kind of maybe spherical. So now let's look at the rows, and I can see that in the first row that they kind of look Write a color for now, but vertically, purple and pink. And there's this thing IĬan barely see down here, so I'm just not going to ![]() So vertically, in the top twoĪt least, it looks purple, and on the right I can They might be looking at, and you can see that Underneath a microscope to see these bacteria. That we're the scientists or pathologists looking Let's talk about how we can actually tell bacteria apart. ![]()
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