Microbiology - Streptococcus species
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- Опубликовано: 4 окт 2024
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"Bacteria can be divided into gram negative or gram positive depending on their cell wall/peptidoglycan make up. Gram positive implies thick peptidoglycan layer and stain a purple colour.
There are two main spp of gram positive cocci that causes human infections. These are Streptococci and staphylococci, they are differentiated by two main criteria: first their ability to produce the enzyme catalase. Streptococci are catalase negative. Staphylococci are catalase positive, which allow them to convert hydrogen peroxide to water and oxygen gas. Hence on a slide or tube bubbles are formed. Second criteria to differentiate staph and strep is based on microscopic appearance. Staphylococcus spp are usually in clusters, where as streptococci are arranged in pairs, or chains.
Streptococcal infections remain a serious health problem worldwide.
The streptococci are divided based on their oxygen requirement are classified into aerobes/facultative anaerobes and obligate anaerobes. Here we are focusing on the aerobic and facultative anaerobes which make up majority of strep spp. I am writing aerobic here because facultative anaerobes are able to survive in oxygen.
The Gram- positive streptococci are then further divided into the haemolytic properties in blood. The streptococcus spp. are smeared in blood agar which is a plate containing blood. Haemolytic property of the bacteria mean the bacteria ability to haemolyse, breakdown red blood cells. Streptococci are divided into three haemolytic groups:
· Alpha haemolytic
· Beta haemolytic
· Gamma haemolytic
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Please do more microbiology videos! They're so easy to understand
If anybody want to get help in case of microbiology, virology, parasitology cell biology, biotechnology they can ask me... I can help you by my self.
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Ah, streptococcus! A major baller in the bacteria game 😎👍
We need more Bacteria types. This is very good explained!
these videos right at the time of exam prep hit different !! thanks !! you're a real one !!!
Very well presented, organized and explained. I love it. I'm learning so much with your videos. Thanks very much for creating them, for the pace and tone. They are very easy to follow and understand.
Excellently explained! Always manage to make complex explanations so simple!
Finally the first to watch ur video, love ur videos you really helped me go through med school ur videos are amazing and will definitely watch weather I’m in school or if I’m a doctor working .thank you armando keep up the good work
ty ty ty ty ty ty ty ty ty ive been searching for a vid like this for 30 mins.. I knew most or common strep species I just needed to understand the groups and how were they classified so thank you
I think this is the best of aall your vids...extremely well explained... Thank u
I absolutely loved this video, it made things so much clearer, I couldn't find an explanation to Lancefield grouping and here it is !
SUPER HELPFUL. REALLY COULDNT VISUALIZE GRAM ALGORITHM UNTIL THIS VIDEO!
You're awesome! Thank you for making med school easier!
Great presentation! Thank you for making these.
Love your videos! So happy you are making microbiology lessons now, it’s a difficult subject to remember for me personally ...
Ma'am I want to talk to you
I'am from india
As compare to your old videos , you are explaining very slowly and thats make it easy for me to understand the concept. This way is much better. Thank you so much.
The explanations were so good, thank you!
Wow I learned so much & just a few please continue teaching, great video very well explained. thank you thank you
Bro, you are the best really, this is the easiest classification video out there
Venerable Sir.
Your vedios help alot.
Love and Respect from Kashmir India
we need more Bacteria types.
Thank you,sir.This video really helped me a lot.
I enjoyed this video very much Armando! This is brilliant!
Such a great explination !
You are a legend !
Love this video! Thanks a bunch.
I did enjoy it. Thanks
Thank you from a patient . Keep Lifted
Omg I love this video - very clear explanation. Thank you!
Please video on streptococcus pyogenes
Ekstra objasnjeno .. hvala 😊😊
wonderful video to have a good basic about those bacteria
Brilliant!
Thank you so much for these awesome videos.
Thank you very much, Sir. After a lot of confusion on this topic, i came to your video and it really cleared my head. Thank you ❤️🙏
thank you so much
Interesting... Thank you for the information and keep it up!!
please make explained videos on each type of streptococcus and other bacterias too
This was really good 👍 thanks for the helpful video
love your work!
You are excellent
Excellent! Thank you very much!
Tq so much it's helped me a lot
thank you very much... It is so helpful
Please do more bacteria video in this lockdown please sir.........🙏🙏🙏🙏🙏🙏
You're great as always 😍😍😍
Great video, helped me a lot. Although maybe more visualization (just a bit) may help some guys..
explained better than my just graduated medical technologist teacher
Hope you make one for staphylococcus species
Sir please make special videos on each becteria, we need deep study sir, your videos are so helpful sir
Thanks!
ayy amazingg. please make videos more detailed.
Thx my friend
Wow..good job...
Thanks a lot 😊😊😊😊😊
Perfect!
Thx🌹🤝🏼
This was helpful thank u
thanks man
Very well explained.. tysm :)
Nice class
watching this while streptococcus have massive hardcore rave party on my tonsils.
شكرا جزيلا
Well explained
Shalom,
could you please post a picture of the whole drawing with the cascade from top to bottom? Would be a huge help to me and my pharmacy classmates!!
Much love from israel
Great video
Thxs
Ur teaching is v nyc sir
Thanks a ton!
Nice video 🙌🙌🙌🙌🙌
Thankyou
Great video!
perfect ..thanks so much..its A to V not W if Im not wrong..thanks again
Really amazing
More! I ned more microbio.
Perfect
Good video, but Enterococcus has been separated from Streptococcus group D since 1984 when it became its own genus!
Perfect thanks sir😍
Please make more videos on microbiology
Plz more video about staphylococcus
Thanks so much🌼
Thank you ✨✨
Thanku so much❤️
Gram positive bacteria aren't stained because of a 'thicker' pep layer. They stain because it's exposed, unprotected relative to the gram -ve bacteria which have an outer membrane. Might seem nit-picking but makes a big difference when wondering why they stain and what the differences can mean.
Thank u
Do more microbiology vids pls..that ks
Tq
Nice video sir
Thank youuuu
wow presentation
I'm fucking dumb.
I'm Greek and couldn't remember that streptococci are in pairs or chains and staphylococci are in clusters but when you drew them in clusters they looked like grapes and literally staphyli in Greek means grape 🤦🏻♀️ of course staphylococci are in clusters, they are purple since they're gram positive and are named after grape... Thanks for the awesome videos
Hi, how do I get a full image of this great explanation? Thank you
Next session ?
I don`t understand how Enterococcus species are classified as Streptococci. Will be happy if someone explains
Make more videos in surgery and medicine
Wowww
You said oxygen. So my question is if one uses 3 % hydrogen peroxide to as high as 10% will the streptococcus still be able to live? I ask this because I was taught there are no know viruses that can live in an oxygen RICH environment. Is this true or not?
Please tell me which the next video of this related chapter
Wow.
Sir no more videos on streptococcus?
رائع جداً
Why not i and j??
very nice ez
I need information on Strep C..
Are you sure enterococcus faecalis and faecium are γ haemolytic ? My book says it's α