Microbiology - Streptococcus species
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- เผยแพร่เมื่อ 20 พ.ค. 2019
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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
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We need more Bacteria types. This is very good explained!
Excellently explained! Always manage to make complex explanations so simple!
Ah, streptococcus! A major baller in the bacteria game 😎👍
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.
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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
Great presentation! Thank you for making these.
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!
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
SUPER HELPFUL. REALLY COULDNT VISUALIZE GRAM ALGORITHM UNTIL THIS VIDEO!
I absolutely loved this video, it made things so much clearer, I couldn't find an explanation to Lancefield grouping and here it is !
Thank you,sir.This video really helped me a lot.
I enjoyed this video very much Armando! This is brilliant!
Bro, you are the best really, this is the easiest classification video out there
Omg I love this video - very clear explanation. Thank you!
Wow I learned so much & just a few please continue teaching, great video very well explained. thank you thank you
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 ❤️🙏
Love your videos! So happy you are making microbiology lessons now, it’s a difficult subject to remember for me personally ...
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I think this is the best of aall your vids...extremely well explained... Thank u
Love this video! Thanks a bunch.
Interesting... Thank you for the information and keep it up!!
Such a great explination !
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wonderful video to have a good basic about those bacteria
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Brilliant!
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This was really good 👍 thanks for the helpful video
Great video, helped me a lot. Although maybe more visualization (just a bit) may help some guys..
Thanks a ton!
Hi, how do I get a full image of this great explanation? Thank you
This was helpful thank u
thank you very much... It is so helpful
Perfect
Hope you make one for staphylococcus species
Thanks!
Sir please make special videos on each becteria, we need deep study sir, your videos are so helpful sir
I did enjoy it. Thanks
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Venerable Sir.
Your vedios help alot.
Love and Respect from Kashmir India
Very well explained.. tysm :)
please make explained videos on each type of streptococcus and other bacterias too
Thanks so much🌼
Great video!
Thank you ✨✨
Well explained
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Perfect!
Thx🌹🤝🏼
Hi i cant access your website. is it down or my ISP blocked it? i checked using a 3rd party app and it shows the website is down. Hope i can access your site again soon. Thank you for the great lectures.
Thx my friend
شكرا جزيلا
Thank u
Thankyou
Thxs
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Please video on streptococcus pyogenes
Tq so much it's helped me a lot
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Dear please tell me which software you use for animation?
Thank youuuu
Thank you from a patient . Keep Lifted
Excellent! Thank you very much!
Thanku so much❤️
Please make more videos on microbiology
Nice class
we need more Bacteria types.
Plz more video about staphylococcus
wow presentation
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Make more videos in surgery and medicine
explained better than my just graduated medical technologist teacher
Please do more bacteria video in this lockdown please sir.........🙏🙏🙏🙏🙏🙏
perfect ..thanks so much..its A to V not W if Im not wrong..thanks again
Tq
Please tell me which the next video of this related chapter
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
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More! I ned more microbio.
Are you sure enterococcus faecalis and faecium are γ haemolytic ? My book says it's α
ayy amazingg. please make videos more detailed.
Sir no more videos on streptococcus?
I need information on Strep C..
Wow.
رائع جداً
Is streptococcus in the mouth & infect teeth, staphylococcus infect hair on the skin & resistant to antibiotics?
very nice ez
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Good video, but Enterococcus has been separated from Streptococcus group D since 1984 when it became its own genus!
Amazing. n
watching this while streptococcus have massive hardcore rave party on my tonsils.
👍
Do more microbiology vids pls..that ks