Questions tagged [bacteriology]
A subdivision of microbiology dedicated to the study of bacteria.
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How does lactate produced in the intestines get transported to the rest of the body?
Some gut bacteria known as lactic acid bacteria(LAB) are known to produce lactate in the intestines and they confer beneficial effects such as enhancement of the immune system, but I assume not all of ...
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1answer
37 views
Nucleotide Sequence
So i am from an IT and my sis who is doing medicine asked for my help on this question i have no clue where to start actually. Please Help. So the question is:
What is the nucleotide sequence for ...
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0answers
24 views
Povidone-Iodine disinfectant for Mycobacterium Spp
Is Povidone-Iodine's effective in killing Mycobacterium Spp ? Can it be used to disinfect the fish tanks? I found some research articles that states it is 99% effective. If yes, what would be the ...
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0answers
54 views
Why do some vaccines lose their efficacy with time?
Why do some vaccines lose with time their efficacy?
The two obvious examples that I have in mind are influenza and tetanus. The former case is clear, as influenza virus undergoes frequent gene ...
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0answers
42 views
Questions regarding transformation in bacterial cells
First off, in transformation the donor DNA aligns itself with the complementary bases in the recipient DNA.
Now a "perfect" alignment of the donor DNA ( Sorry if my terminologies are ...
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1answer
33 views
How to attract Cyanobacteria?
I would like to attract cyanobacteria in one spot on an object (e.g. cloth,) instead of having it swim in the media. my current method is to pour it on the object in a beaker and wait for some of them ...
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23 views
Why does touch the face make more likely to be infected?
Why is it risky to touch the face although there is no direct contact with into the nose, eyes and mouth?
Is there any possibility that pathogens infect us from our facial skin?
Suppose we have ...
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0answers
19 views
What is the rate of bacterial cell death due to viruses on land?
"The rate of viral infection in the oceans stands at 1 × 10^23 infections per second, and these infections remove 20–40% of all bacterial cells each day." - https://www.nature.com/articles/...
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What compounds are consumed/produced by Staph. aureus grown on Mueller Hinton agar over time?
I wonder what are the essential components on Mueller Hinton agar that S. aureus consumes and produces. I imagine there are preferred energy sources and as soon as those compounds run out the organism ...
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1answer
50 views
How to get Bacteria to attach to an Object?
I have cultured Cyanobacteria (in a media) in a beaker. I want that bacteria to attach to a cloth (e.g. Carbon). My current method is using a syringe to slowly push the bacteria to one side of a ...
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5answers
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Can bacteria be killed by purely physical trauma?
In a question over on Skeptics Stack Exchange, I half-jokingly listed "blunt force trauma" as a means by which a bacterium could be killed. That makes me wonder if it really is only a joke ...
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1answer
66 views
How can life survive in the water under the Antarctic ice? [closed]
If there is life in the lakes under the ice of Antarctica then how can those bacteria survive?
Where do they get energy from?
https://www.google.com/amp/s/www.livescience.com/amp/64501-buried-lake-...
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2answers
4k views
Can a bacterium infect another bacterium?
I researched about it by searching on Google and reading some bacteriological articles, but I did not get any answer. I also asked some of my teachers, and they were also a bit confused. Some said ...
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0answers
99 views
“Bacteria don't have membrane-bound organelles.” Are sulfur bacteria or Cyanobacteria exceptions?
Can bacteria have membrane-bound organelles?
I read this many textbooks:
Bacteria cells are simple cells that do not contain a nucleus or other membrane-bound organelles. However, they do contain ...
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1answer
29 views
Low-cost simple water testing for faecal contamination
I live in Indonesia and there are lots of sewage pipes discharging directly from homes/restaurants/etc directly into the river. It's also common to wash clothes and so on, so there is likely detergent ...
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2answers
92 views
Do most bacteria have plasmids?
Do most bacteria have plasmids?
I googled that and I found this
Yes, Plasmids naturally exist in all bacterial cells. Here
But I know some of them don't!
Is this sentence scientifically correct?
...
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2answers
90 views
Why does vacuum sealing of foods prevent spoilage from anaerobic bacteria?
I have noted that many purchased food items in containers only require refrigeration after they have been opened, thus eliminating the vacuum seal. Air contains bacteria and fungus spores that enter ...
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0answers
12 views
Can bacteria (dis)assortatively mate?
After revising some evolutionary concepts, I stumbled on the "big five" of evolution (e.g., mutation, selection, mating, genetic drift, gene flow). I wanted to understand if mating as in &...
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1answer
20 views
Are diplobacillus physically connected?
I know that a diplobacillus is a bacillus bacteria that has a buddy 'attached' to it.
What I haven't been able to determine is exactly how is it 'attached'? Are their cell membranes fused - are they ...
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1answer
56 views
Horizontal gene transfer in a bacteria
I encountered an old examination question:
Which of the following is not required in Bacteria for horizontal gene transfers?
Infection 2. Translation 3. Transformation 4. Conjugation 5. Transduction
...
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0answers
26 views
Staphylococcus (antibacterial soaps and Traditional Lathering soaps)
I have been working on a biology research assignment regarding the claim:
Antibacterial soaps are superior to traditional lathering soaps in
minimizing the transmission of disease
I have made a ...
0
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1answer
47 views
Is there any description about how microbes spread from a small place to a very large place?
Is there any materials (such as books, papers or others) about how microbes (such as the bacteria or virus) or a special kind of microbe spread from a small place to a very large area (such as the ...
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1answer
35 views
How do animals contain and dispose of bacterial endotoxins (lipopolysaccharides)?
Gram negative bacteria naturally release endotoxins which are lipopolysaccharide molecules. These molecules are toxic to many eukaryote cells, including macrophages. My question is how animal ...
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0answers
46 views
Interpretation of Pangenome: high number of accessory genes
I performed a pangenomic analysis on a collection of 52 strains belonging to the same genus (some 5-6 different species). All the strains were isolated from the same environment: interior compartment ...
7
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1answer
133 views
Which is the most extreme thermophilic bacteria known?
Extreme thermophilic bacteria thrive at any temperature above 40/50°C. Thermotoga Maritima seems to be the bacteria that can survive at the highest temperature up to 90°C (reference 1, table 2). I ...
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1answer
27 views
Will ammonia continue to accumulate in an aquarium tank if a strong antibacterial or chlorine is added to the water?
I've always wondered what would happen if dead plants and fecal matter lay in chlorinated waters and/or waters treated with strong antibacterials or antibiotics.
I've heard that aquarium tanks ...
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3answers
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Do viruses or bacteria have a flavour?
My 9 year old niece asked me this when I was explaining some stuff to her about the coronavirus. She asked "What does this virus taste like? Can I tell whether my sandwich is contaminated for ...
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1answer
51 views
How can I obtain a uniform bacterial sample?
I'm currently doing a research project wherein I will be testing the antibiotic resistance of a bacterial sample. Due to a risk of contamination during transport, I'm not allowed to request a uniform ...
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3answers
63 views
Does the process of making a sourdough starter involve Darwinian selection?
In essence - to make a sourdough starter:
Put flour and water in a jar, and leave it in a warm place overnight
Divide the remaining mixture in half, throw out half, add half as much flour and water ...
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1answer
62 views
How effective is rinsing in removing microbes from surfaces
Microbes including viruses stay alive on surfaces depending upon the type of the surface like steel, wood, plastic, glass, marble etc. How effective is rinsing these surfaces with tap water in ...
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1answer
30 views
How quicky does dental pH change after eating?
I would like to know how quickly after eating I can expect the pH do change in my mouth, and how quickly this will cause dental damage.
Obviously any answer to this will have plenty of caveats (diet, ...
1
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1answer
44 views
How is minimum infectious dose defined?
I'm a bit confused by the concept of a minimum infectious dose (MID). It seems from what my research so far has turned up, that while any dose greater than 0 could potentially cause an infection, for ...
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1answer
39 views
Can I find out what resistance bacteria has based on strain? where do I look for that info?
I have a list of strains across various organisms for example:
Escherichia coli - ATCC 25922, CGSC 6152, W3110RL.
Pseudomonas aeruginosa - ATCC 27853, PAO1, APAE1111.
I'm failing to find any ...
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0answers
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Optimal bacterial vegetative cell inactivation method(s) after subtilis spores germinated under pressure
I am writing a PhD research proposal and being a newbie in the field I am lost a little bit in the bacterial vegetative cell inactivation methods in foods.
I should propose two main methods to my ...
12
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2answers
6k views
Is there a bacterium that became a virus?
Is it possible for a virus to be a descendant of a bacterium that was not through horizontal gene transfer?
How I think this could happen:
Suppose a species of bacteria lives in an environment where ...
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0answers
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What are the methods to quantify the bacterial adhesion rate for the biofilms grown on coupons in CDC or annular bioreactor, non-invasively?
I'm interested to know that if I grow the biofilm on coupons in the CDC bioreactor at a particular shear stress, and after say 48 hours, I take out the coupon from the bioreactor to quantify the ...
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0answers
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What is the protein composition of complete Freund's adjuvant?
The complete form of this adjuvant uses heat inactivated and dried mycobacteria. However, to rule out cross-reactivity with an antibody, I would like to know which proteins are left in the adjuvant. ...
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1answer
84 views
What is the principle behind Microagglutination test (MAT)?
Could some one please help me understand the principle behind the MAT. Also, is it only used to detect leptospira or can it be used to detect other pathogens as well? Kindly share links to papers if ...
21
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2answers
4k views
Is there a vaccine against the plague (Yersinia pestis)?
There seems to be recurrent events of infections of the plage (Yersinia pestis), from the well known Justinian plague to the Black Death and to recent years. In fact, two cases were reported in China ...
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How antibodies are produced in our body against intracellular proteins of infectious bacteria?
When an infectious agent invades our body, then surface antigens of the infectious agent are detected by our immune system and B-cells get activated. However, we do have antibodies in our blood ...
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Is there a critical size for a bacteria colony forming?
I am a maths student doing a project based on modelling bacteria and phages. In one of my models the bacteria population reaches a population size of ~450 cells.
Would a colony of bacteria this size ...
2
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1answer
57 views
Growing Mouth Bacteria in a bowl of sugar water
I want to teach my nephew why brushing in necessary and how sugar in mouth reduced by bacteria to acid.
I plan to put sugar mixed water in bowl and take swab from his mouth and dip in bowl, and test ...
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1answer
52 views
Why doesn't infection with Clostridium Tetani immunize you?
What Immunity to COVID-19 Really Means - Scientific American
It is less clear what those antibody tests mean for real life, however, because immunity functions on a continuum. With some pathogens, ...
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0answers
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I need to identify the genus of this colony just by its morphology, can somebody help me?
it was grown on TSA
it's a mesophilic bacteria.
(it was contaminated by E. coli, so ignore the clearer and smoother colonies).
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How to prepare bacterin using formalin(formaldehyde)
I am finding how much formalin I have to use to make bacterins for vaccine experiments.
I searched for it in google but I can't find about specific procedures like the concentration of formalin and ...
3
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2answers
71 views
Can far-UVC light be safely used as germicide? (help understanding a paper)
I've been trying to familiarize myself with the literature on far UVC light as a germicide. My question mostly pertains to figure 4 of this paper. The paper investigates the efficacy of 207 nm light ...
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1answer
41 views
Is Klebsiella pneumoniae found in the throat of healthy people? [closed]
Is Klebsiella pneumoniae found in the throat of healthy people?
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Can virus and bacteria move on the surface? [duplicate]
Do viruses/bacteria have some motive mechanism? I mean if the virus/bacteria reach some surface by touching, can it move on that surface?
Life example: suppose the cooler is not so clean and has ...
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0answers
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How to convert AU/ml of bacteriocin into zone of inhibition in mm?
My questions is about measuring antimicrobial activity against bacteria on petri plate. Is it possible to convert or somehow get zone of inhibition in millimetre from AU/ml?
2
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1answer
67 views
Can viruses stabilize and increase the shelf life of wine and other foods?
When you make wine, you use the yeast Saccharomyces cerevisiae to ferment sugary juices. After you're done, you want to avoid them doing anything by using some chemicals etc. There are also other ...
