Are You A Dog Or Cat Person?

DaveC426913 said:
Distilled for clarity.

W4U, let's make sure there's no further confusion about this, all right?
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Ok, I would certainly welcome that. It seemed you narrowed it down to the digestive tract only, but I have seen many references to good and bad bacteria inside our organs.
Introduction.
The human microbiota (the ecological community of commensal, symbiotic, and pathogenic microorganisms present in our body) or microbiome (entire genome sequence of a microbial community) [1, 2] has recently emerged as an important factor in human physiology, both under homeostatic (health) and pathological conditions [3].
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The microbiome is predominantly formed by bacteria but also comprises fungi, yeast, viruses, and archaea that live in our bodies, with each particular region of the body corresponding to a highly specialized niche characterized by its own microbial clusters, society dynamics, and interaction with the host tissue [4].
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Remarkably, 90% of the cells in the human body are constituted by prokaryotic cells which form the microbiota [5] and participate in metabolic functions, contribute to the education of the immune system, protect against pathogenic microorganisms (Figure 1), and, through these basic functions, directly or indirectly, affect many of our physiological functions [6].
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https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4544440/bin/JDR2015-284680.001.jpg

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4544440/

Perhaps I should use the term microbiota and microbiomes instead of bacteria, which tends to be a specific micro-organism?

I do want to be correct in this, I started a tread on this and am responsible for its general correctness. A daunting task......o_O
 
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DaveC426913 said:
If you look through that list, you'll see that everyone of those inhabits our exterior and/or our digestive tract.
They do get into our internals, but when they do, they make us sick, and our bodies defend themselves.
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Beneficial microbiotics do not make us sick, they keep us healthy, but not by killing bad bacteria, i.e. virulence. They do not fight with other bacteria. They just crowd them out. It's part of the "quorum sensing" ability of all bacteria.
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Figure 1: Location of normal microbial flora. Each of these areas of the body contain their own microenvironments and various inhabitants of microbes.
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Figure 2: H. plyori creates it own microenvironment by burrowing into the mucosal lining of the stomach. Within the lining, the microbe is then able to avoid pH levels that would normally kill it. Here, it may also produce ulcers.
While the anticipated benefit is a lower chance of vascular disease, taking daily aspirin is not without danger: for instance it raises the risk of internal bleeding. Hence the important need to discuss beforehand with the doctor, "In my case, doc, should I be taking daily aspirin?
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https://www.medicalnewstoday.com/articles/243265.php
The human body provides many unique environments for different bacterial communities to live. In this context, scientists refer to the human body as the host. A positive host-microbe relationship is usually described as either mutualistic or commensalistic. In mutualism both the host and the microbe benefit. Which is in contract to commensalisms, where one partner of the relationship benefits (usually the microbe) and the other partner (usually the host) is neither benefited nor harmed.
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I'll stop here with this . It is getting too far removed from the OP question.

Love to discuss it more in Biology and Genetics under "Microbiomes".
 
Some bacteria are good; some bacteria are bad.
Some plants are healthy; some plants are poisonous.
Cats purr; dogs bark.
 
People undergoing heavy course of antibiotics have trouble digesting their food. "Intestinal flora" need to be reestablished.

I know.
 
Write4U said:
Beneficial microbiotics do not make us sick, they keep us healthy, but not by killing bad bacteria, i.e. virulence. They do not fight with other bacteria. They just crowd them out. It's part of the "quorum sensing" ability of all bacteria.
normalflorabody.gif
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Oh my god, how can you keep missing this?
All those locations are physiologically exterior. Including the stomach, intestine and rectum.
 
DaveC426913 said:
Oh my god, how can you keep missing this?
All those locations are physiologically exterior. Including the stomach, intestine and rectum.
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I am not missing this. I know the digestive tract is an exterior surface. But by that generalization so is the respiratory system. The point is that once inside the body these surfaces are no longer exposed to the exterior environment, and the microbiome creates its own environment, responsible for a host of different beneficial functions, affecting the entire health of the host. To reduce this to a mere surface function is short-changing the functional symbiosis between human cells and non-human bacterial cells.

The bacteria exist both on the outside surfaces and on the inside outside surfaces.

You are stating an absolute that is just not true. The majority of bacteria live in our digestive tracts, true, but not ALL.
Microbiomes are individual to each organism; the diversity in microbiomes between individuals is huge, and even within a person there can be extensive variation in their microbiome makeup. For humans, there are a number of specific and separate microbiomes present. From skin to lungs to the gastrointestinal tract, to the respiratory system, to the vaginal system (to name a few), all of these specific microbiomes make up a unique microbiome for each human.
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The microbiome is defined as the collective genomes of the microbes (composed of bacteria, bacteriophage, fungi, protozoa and viruses) that live inside and on the human body. We have about 10 times as many microbial cells as human cells. So, to study the human as a "supraorganism," composed of both non-human and human cells, in 2007 the National Institutes of Health (NIH) launched the Human Microbiome Project (HMP) as a conceptual extension of the Human Genome Project.
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https://www.genome.gov/27549400/the...ng-the-definition-of-what-constitutes-a-human

And what about other organisms? Plant growth and resistance to internal and external infection, photosynthesis in leaved plants.
Introduction,
Photosynthetic bacteria have been around for longer than the Earth’s atmosphere could sustain human life. It was only recently though that scientists began to unravel the mystery of how these micro-organisms execute the mechanisms of photosynthesis. This is also both surface and interior bacterial processing functions
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https://photosynthesiseducation.com/photosynthesis-in-bacteria/

How is it that the Hawaiian Bobtail Squid has evolved an entirely new organ which houses live bioluminescent bacteria and flushes out dead bacteria in accordance to the circadian rhythm? Do they know something humans don't?

The squid uses the light properties of the bacteria to hide itself from predation, while it provides a completely separated nutrient rich safe environment for the bacterium, a whole new application of mutually beneficial symbiosis.

Luminescent bacteria emit light as the result of a chemical reaction during which chemical energy is converted to light energy. Luminescent bacteria exist as symbiotic organisms carried within a larger organism, such as many deep sea organisms, including the Lantern Fish, the Angler fish, certain jellyfish, certain clams and the Gulper eel. The light is generated by an enzyme-catalyzed chemoluminescence reaction, wherein the pigment luciferin is oxidised by the enzyme luciferase. The expression of genes related to bioluminescence is controlled by an operon called the lux operon.
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Some species of luminescent bacteria possess quorum sensing, the ability to determine local population by the concentration of chemical messengers. Species which have quorum sensing can turn on and off certain chemical pathways, commonly luminescence; in this way, once population levels reach a certain point the bacteria switch on light-production
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https://en.wikipedia.org/wiki/Luminescent_bacteria
 
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Can a mod transfer this discussion on microbiomes to my thread "Microbiomes" in Biology and Genetics, please. That's where it belongs.
 
elte said:
I'm very fond of cellar spiders, pholcids, which share my place.
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We get some big spiders over the spring and summer here in New Jersey. In the house they are usually small and easy to catch and release outside. Spiders help kill the insect pests in your house, if they get in.
 
elte said:
I recently saw maybe the biggest variety here in southern OH, in my shed.
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That is cool! My favorite type of spider is the jumping spider. We have them here in New Jersey. I have read their venom is not dangerous to humans, should they bite you.
 
The dog/cat person thing had me thinking of it how I'm autistic and naturally less social, making me identify as a cat person/personality.
 
mmatt9876 said:
That is cool! My favorite type of spider is the jumping spider. We have them here in New Jersey. I have read their venom is not dangerous to humans, should they bite you.
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It was a nursery web spider! Big but possibly generally harmless. I like jumping spiders too, a lot because of how they seem harmless. That way with cellar spiders I like so much--having harmlessness and a cute type of helplessness, but yet not minding me much at all unless I accidently bump their webs, when they move away quickly. I liked to watch the small jumping spiders walking, and turning around a lot, on the orange brick walls of my parent's house when I was young.
 
elte said:
The dog/cat person thing had me thinking of it how I'm autistic and naturally less social, making me identify as a cat person/personality.
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But cats, when given the opportunity, will form creches where the queens share responsibility for the kittens. Barn cats have been found to have quite a complex society. Being semi-feral they have the option to leave if they wish.
 
elte said:
I wonder how the male cats fit in.
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Tom, ahem, come and go. :D But seriously, folks, toms float around the periphery, and learn to not too near the creche. They sometimes club up, but they can move across country when pheromones demand it.
 
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