Swimming Bacteria, Normal or Strange.

The bacteria (Escherichia coli) are swimming actively in the medium.
They are mainly at least 3-5 times longer than normal length during this exponential phase.
They apparently continued to grow (increase in chromosomes and all the cytoplasmic contents) without cell division.

A day later I recorded them (same slide) again, as you'll see they were much less active and shown in mostly normal or double-sized cells.
This phase is known as the stationary phase.

Then, I Gram's stained them. They turned red after counterstaining with Safranin-O. Note that in the clip, the cell colour is not exactly as it was seen microscopically. This was because of prior setting of hue in the recorder's programme.

The flagella in the drawings are exaggeratedly large. (If interested, I'd suggest you watch vids on flagella. You'd have a clearer picture of it.) The actual normal diameter is too small to be visualized in the microscope without staining or using any other techniques. The characteristic movement therefore implies us that there is(are) at the first glance.

Interestingly, did you notice?, some cells could seemingly attract other cells attachment (other cells came to visit that area more often.).
Do you have any explanation for that?

Category:

Education

Tags:

• flagella
• flagellum
• motility
• E.
• coli
• Escherichia
• bacteria
• exponential
• stationary
• phase

[71025384]

la musica no va con el video. pq la E-coli no es una bacteria Mortal, mas bien nos ayuda, pq fagocita ciertos organismo q nuestro estomago no puede, ambos nos ayudamos., "simbiosis", pero muy bueno el video

[Seronegative2006]

Gracias mucho por su comentario.

Mejoraré los vids que vienen.

(Para ser honesto, no soy bueno en la música. Aprendía!.

Los he elegido simplemente porque uno de los ritmos es al parecer emocionante y el otro es relativamente más lento.)

[satishshukla24]

nice video

i learn it from the brownian and true motility of bacteria

[rann82]

thank you so much

[ziamosgendura]

Those bacteria must be starving, they're so skinny

[mrphilthify]

lol i did E coli at my school on the FIRST day (im 13) twas pretty freaky. but fascinating

[whamfan87]

E. coli, its the only culture some people have

[nathyjhvfj]

I liked the soundtrack. Do you know the name of the song?

[Seronegative2006]

No. I don't have. You could find some in any microbiological labs in your home town.

[hyde4never]

Yeah, I need E. coli, do you have?

[hyde4never]

Do you have bacteria like E. Coli that show the swim under microscope?