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Biologically-synthesized chemicals (or their derivatives) that cause growth suppression or death of bacteria. Other anti-microbials are often also considered under the class antibiotics these days.

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Are red blood cells prokaryotic?

After searching "do antibiotics impact the immune system" I found out that antibiotics target prokaryotic cells. It all made a lot of sense thinking about all those yogurt recommendations you get ...
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2answers
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why don't antibiotics reduce our weight?

I know that a significant weight of the human body (in Kgs) is contributed by microbiota. I also know that antibiotics can often be broad spectrum and kill all the bacterias regardless of them being ...
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1answer
31 views

Why is AMR not widespread?

we know that resistant strains (MDR, XDR, PDR) have arisen in single incidents around the globe but why are these bacteria not common and not spreading quickly as humans keep using antibiotics and ...
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1answer
14 views

Technique to test antibiotic resistance in a bacteria in presence of another compound

so I have to 'quantitatively' assess a bacterial strain for its antibiotic resistance property (it is a specific antibiotic) in the presence and absence of another compound alongside antibiotic. What ...
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2answers
57 views

Is there any kind of antibiotic effective against fungi?

I know that antibiotics usually have properties affecting specifically bacterial cells, like by inhibiting peptidoglycan synthesis. but do any antibiotics exist affecting eukaryotic cells, like yeast ...
3
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2answers
51 views

What effect does taking antibiotics unnecessarily have on future bacterial infections?

I have been told by my biology teacher that you shouldn't take antibiotics unnecessarily because "the body gets used to them" and it reduces the effectiveness of antibiotics against future bacterial ...
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0answers
9 views

Polysporin/antibioltic ointment and agar plates

Has anyone tried applying a layer of antibiotic ointment to the surface of their agar after autoclave sterilization? A friend suggested that I use an antibiotic in my agar. So it got me wondering if ...
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0answers
21 views

Half life of Nitrofurantoin

Both wikipedia and Toxnet list the half-life of Nitrofurantoin as 20-60 minutes in the blood plasma. Can anyone explain how this is so short, especially for an antibiotic, and how it still has time to ...
2
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0answers
292 views

What does the “G” and “V” in penicillin V and penicillin G stand for?

I've been looking for a convincing explanation for the designation penicillin G and V. The answers I've found includes G as in "gold standard" and "V" as in "viscus" but they're not sourced and not ...
0
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1answer
110 views

Does cow urine have medicinal properties?

It is a common belief in India that cow urine has medicinal properties. It is said to be anti-biotic. It cures diabetes, cancer and many other diseases if not all. Because this is biology I would ...
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3answers
107 views

Infection treatment without anti-biotic

When we have some bacterial infection, say throat infection (pharyngitis) we take antibiotics as treatment. I was wondering how throat infection was treated when there was no antibiotics at all, ...
2
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0answers
16 views

Does Penicillium roqueforti produce penicyllin?

I have recently discovered that blue cheese is produced with Penicillium roqueforti. As I know that some Penicillinum sp. produce penicyllin I wonder whether it is produced by P. roqueforti too? The ...
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0answers
14 views

Microbroth dilution

I have performed MIC test for fungi candida albicans, Cryptococcus neoformans and Aspergillus fumigatus in a 96 well plate by broth microdilution method by drugs Amphotericin B and fluconazole.....
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2answers
577 views

Are fluoroquinolone antibiotics (Cipro, Levaquin, etc) chemotherapy drugs?

I read a claim (I can't find the source) that fluoroquinolone antibiotics are actually chemotherapy drugs, or maybe to be more specific, are "chemotherapeutic." Is this claim true? Additionally, if ...
0
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0answers
22 views

Are there safe ways to selectively wipeout gut bacteria eg medication followed bu dieting to change the makeup of the colony?

Do certain antibiotics kill enough gut bacteria so that we can quickly cultivate "good" gut bacteria through dieting? Similarly are there other simple methods that can selectively and quickly get rid ...
3
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0answers
71 views

Is it inevitable that antibiotics will become useless in the future due to bacteria immunities?

Antibiotics are developed in an ever smaller amount due to the difficulties of discovering new ones. Bacteria, on the other hand, keep "finding" more ways to render antibiotics ineffective, and they ...
2
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3answers
165 views

Could plasmids and conjugation mechanisms be used against antibiotic-resistant bacteria? [closed]

I'm surprised no one has mentioned something like this. Plasmids are often exchanged between bacteria, sometimes through conjugation. In particular, conjugation could be considered an "open-port" ...
3
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1answer
1k views

How do the three mechanisms of the 1000X improved “new” vancomycin work together?

The BBC News article Ultra-tough antibiotic to fight superbugs says (in part): One hard-to-treat infection that has been worrying doctors is vancomycin-resistant enterococci or VRE. It has ...
2
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1answer
100 views

Why would eating the meat of cows fed with antibiotics trigger an immune response to the antibiotics? [closed]

The document "Antibiotics and Antibiotic resistance" contains the following paragraph: The indiscriminate use of antibiotics in feed stuffs means that humans may receive unwanted doses of ...
2
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2answers
75 views

Why are aminoglycoside antibiotics particularly effective for aerobic gram negative bacteria?

Aminoglycosides are short chains of sugar molecules with some -OH groups substituted with amine groups. As far as I understand they function by causing bacterial ribosomes to misread RNA and create ...
2
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2answers
2k views

Why should benzalkonium chloride (an antifungal agent) be used during your laundry machine's “rinse” cycle, not its “wash” cycle?

I'll first provide lots of background information. My actual question is at the very end. Background The spread of athlete's foot Athlete's foot is a fungal infection which is mildly contagious. ...
2
votes
1answer
137 views

Can methylisothiazolinone/methylchloroisothiazolinone (MI/MCI) behave as bacteriostatic in low concentrations?

Wikipedia mentions this as a biocide. It also mentions that low concentrations of certain bacteriocides is bacteriostatic. (I am assuming that biocide and bacteriocide play the same role, here.) ...
3
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1answer
323 views

Antibiotic resistance of Staphylococcus epidermidis and S. warneri

I am looking for information regarding the antibiotic resistance of S. epidermidis and S. warneri, specifically against penicillin, ampicillin and tetracycline but to no avail. Are there any good ...
3
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1answer
65 views

Have bacteria evolved antibiotic resistance in a laboratory setting?

Is it possible to breed a strain of bacteria in a laboratory setting so that it gains resistance to an antibiotic, replicating the kinds of resistance seen in wild, and has that been done?
9
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2answers
174 views

Is taking a shower unnecessary if good bacteria surround our skin?

David Whitlock, a scientist, has not taken a shower for 12 years. Instead, he sprays a bacterial mist containing live bacteria to remove odor and maintain the number of good bacteria. It is because ...
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1answer
453 views

Drug and antibiotic resistance in organism [closed]

Out of gram positive or gram negative or both which one is having a higher resistance to drug or antibiotics? How the organism gains that gene for drug or antibiotics resistance.? Kindly explain it in ...
10
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4answers
208 views

How do antibiotics combined with a non-Western diet affect weight loss?

Wikipedia describes a Western diet as: ... higher intakes of red and processed meat, butter, high-fat dairy products, eggs, refined grains, white potatoes, french fries, and high-sugar drinks. In ...
2
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1answer
286 views

What does completing the course of antibiotics accomplish?

This article from the WHO states: If you stop treatment early, there is a risk the antibiotics won’t have killed all the bacteria that made you sick and that it will mutate and become resistant. ...
2
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1answer
117 views

Comparative effectiveness of antibiotics against colonies and growing bacteria

Appropriate antibiotics usually eliminate bacteria. However are the same antibiotics as effective against bacteria that have grown to form a colony?
2
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0answers
47 views

After a bacterial infection is dealt with, do any of that colony of bacteria remain?

Suppose that I get a bacterial infection, which my immune system deals with. Are there any remnant bacteria, or are they all gone? Now consider the same scenario, but having been treated with a full ...
3
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2answers
754 views

Why does azithromycin not affect human mitochondria?

Drugs like tetracyclines, macrolides and aminoglycosides bind to prokaryotic ribosomes. It is interesting that our body too having mitochondria, which have prokaryotic ribosomes, there is little(?) ...
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3answers
687 views

Why do we take antibiotics if our immune system already produces them? [closed]

Why do we take antibiotics if our immune system already produces them? Is it because our body doesnt make enough or the specific complementary antibody to fit with the antigen?
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0answers
83 views

Effective Mycoplasma Elimination from Primary Human Cultures

Obviously the best way to avoid mycoplasma contamination is to avoid it in the first place. In our case, however, it is not possible to avoid. We are culturing viruses and tissues out of human nasal ...
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0answers
43 views

Why are treatment periods with antibiotics longer than 1-2 days?

Antibiotics are given prophylactically for several indications (e.g. prior to dental surgery). Why are the treatment periods for prophylactic antibiotics much shorter than when treating an ...
1
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1answer
3k views

How can you develop a bacterial infection when taking antibiotics for another area of the body with a bacterial infection? [closed]

How can you develop a bacterial infection when taking antibiotics for another area? For example, "if someone was prescribed an antibiotic for a bacterial infection of the throat and while taking the ...
1
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0answers
124 views

Why doesn't one develop immunity to bacterial STIs?

Why doesn't one develop immunity to STIs such as Chlamydia/Gonorrhea and Syphilis even after the first exposure and treatment with antibiotics?
1
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2answers
76 views

Could a prolonged amount of Antibiotics severely affect the digestion Gut Microbiota?

Could taking antibiotics for a prolonged amount of time severely harm or even worse kill off a large proportion of Gut Microbiota responsible entirely for digestion, Resulting in lifelong digestion ...
0
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0answers
44 views

30s ribosomal Inhibitor (Antibiotic)Question

I have a question regarding the mode of action of 30s ribosomal Inhibitors (antibiotcs) - tetracyclines. According to some online resources, the antibiotics enter the A-site, which prevents other tRNA ...
1
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2answers
685 views

Why is the penicillin/ceftriaxone hypersensitivity test only done once?

I have had a severe bacterial infection. I was prescribed ceftriaxone, and when the time came for injecting it the nurse asked me whether I have an allergy to ceftriaxone. I answered that it's my ...
5
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3answers
179 views

Is 100% antibacterial resistance possible?

The quest to develop antibacterial and antibiotic substances has often been described as an arms-race, as bacterial life develops resistance, requiring us to develop novel agents which can effectively ...
4
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1answer
282 views

Bacteria resistance to natural antibiotics? [duplicate]

It is a known fact that bacteria develop immunity to antibiotics. Why then did not all bacteria develop immunity to natural antibiotics like penicillin in the fungi? It is for sure that fungi did not ...
1
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1answer
87 views

Are there antibiotics for all bacteria somewhere in the earth? [closed]

When I read about Penicillin, I found that it came from a green mold to protect itself. If all bacteria and/or molds in competition to survive, can we believe that there is an antibiotic for each ...
2
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0answers
174 views

“Antibiotic resistance” equivalent in archaea for selection during cloning

I'm beginning to work with halophilic archaea and I'm trying to figure out a good way to select for cells that have taken up a plasmid. Obviously, one can't use antibiotic resistance since they are ...
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3answers
1k views

Can ampicillin resistant bacteria survive penicillin plate?

in my molecular bio class we were asked a trick question: If the bacteria has a plasmid with that grants it ampicillin ressistance, can the bacteria survive if placed in penicillin? I gave it a ...
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0answers
63 views

What is the effect of antibiotic chloramphenicol on bacterial size?

When low amounts of antibiotics like Chloramphenicol is added in a bacterial culture, the steady-state growth rate decreases but what happens to the steady-state size? Can anybody please refer me to ...
5
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1answer
102 views

How does drug-induced photosensitivity work?

Some drugs (tetracyclines, for instance) can cause photosensitivity reactions—that is, some patients become extremely sensitive to the sun, developing rashes or inflammation after spending time ...
2
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0answers
45 views

Do bacteria develop a resistance to antimicrobial peptides at the same rate as against “regular” antibiotics?

From what I understand, antimicrobial peptides are roughly grouped into three structural sets, with large variations present between different groups as well as within the groups. Their anti-microbial ...
0
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1answer
358 views

How much penicillinase is needed to deactivate 125mg of amoxicillin?

How much penicillinase is needed to deactivate 125mg of amoxicillin? Penicillinase in penase concentrate from CPC. 20,000 Levy Units/ml/min I need IU of 125 mg of amoxicillin. Please note that the ...
21
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2answers
2k views

Could viruses be used as antibiotics?

Could we use viruses that only affect bacteria to act as antibiotics? The more bacteria, the more times the virus divides, so the stronger it gets. Is this practical?
7
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1answer
2k views

What is the impact of sertraline on white blood cells?

This simplified video and RT.com article discusses how the mechanics of the death of a white blood cell can be useful as an "alert mechanism" to other white blood cells of an incoming infection. Also ...