What bacteria are commonly carried in seafood, and what are the common marine bacteria?

A. botulinum toxin B. parahaemolyticus c. Staphylococcus escherichia coli.

There is also a high risk of parasites in the presence of marine fish! Professor Lun Zhaorong of the Parasitic Biology Research Center of the School of Life Sciences of Sun Yat-sen University pointed out that the public should try not to eat raw seafood. At present, due to the pollution of some sea areas, its marine organisms are also infected with bacteria, which can be killed if cooked at high temperatures, but if they are eaten raw, they are easy to infect the human body, and even life-threatening for people with low resistance.

Vibrio vulnificus is not only found in marine shrimp, but also in other seafood such as oysters. Vibrio vulnificus can release strong toxins into the bloodstream, which will cause sepsis and shock, induce systemic organ failure and death. Similar to the Vibrio, the bacteria widely present in the seafood body also have the pathogen of Vibrio parahaemolyticus, the main clinical symptoms of this bacterium are vomiting, abdominal pain, diarrhea, feces are like washing meat or pus and blood, there are wounds that will infect the wound and even cause sepsis, and the severe ones can be dehydrated, unconscious, blood pressure drops, etc., and even life-threatening.

There is also Streptococcus dolphin, which can infect the wound and even cause sepsis.

Even salmon, which is considered to be the safest to eat raw, is susceptible to a type of "anisakis worm". The human body is infected with this bacteria, which is clinically manifested as acute abdominal pain, and the parasite will invade the gastrointestinal wall and other organs, destroy the body's ability to absorb nutrients, and increase the burden on the gastrointestinal tract. According to reports, the insect has long been endemic in 27 countries such as Japan, South Korea, and France, which like to eat sashimi.

Marine bacteria are prokaryotic single-celled organisms that live in the oceans without chlorophyll and phycocyanin, and they are the most widely distributed and abundant group of marine microorganisms.

Marine bacteria are prokaryotic single-celled organisms that live in the ocean and do not contain chlorophyll and phycocyanin. They are the most widely distributed and most abundant group of marine microorganisms, often with a diameter of less than 1 micron and are spherical, rod-shaped, spiral-shaped and branched-filamentous microorganisms. Eukaryotic and tough.

The species that can swim move with flagella. A marine bacterium was first isolated in the mid-19th century, and in 1865 the Mirabular B. baincheri bacterium was isolated from it. Since 1884, he has been studying deep-sea bacteria.

In the early days, only the focus was on classification, and after 1946 it entered a stage based on the study of its physiology and ecology. There are different types of marine bacteria, such as autotrophic and heterotrophic, photoenergetic and chemogenic, aerobic and anaerobic, parasitic and saprophytic, and planktonic and attached. Gram-negative bacilli are dominant in seawater, and there are more than 10 genera such as Pseudomonas, Vibrio, Chromobacterium, Flavobacterium, Spiromycetes, Micrococcus, Octococcus, Bacillus, Corynebacterium, Cactactillus, Nocardia and Streptomyces. Gram-positive bacteria are the majority of ocean floor sediments; Bacillus is the most common sediment on the continental shelf.

Marine bacteria are a type of microorganisms, which are very small life forms and belong to the more primitive species in the evolution of life. Most of them have flagella and are free to move. Some species have both chlorophyll and can live autotrophic and saprophytic vegetative life.

This phenomenon, which has the characteristics of both plants and fungi as well as animals, illustrates the primitiveness of bacteria and the continuity of biological development and evolution.

Bacteria in the ocean are a class of ultra-microscopic organisms that play an essential role in completing the biogeochemical cycle of water matter.

First, bacteria decompose organic matter, including animal excrement and carcasses. These organisms are then converted into inorganic salts, such as some phosphates and nitrates. These inorganic salts are the nutrients necessary for organism (plants) that contain chlorophyll to make organic matter.

Without bacteria, these metabolic cycles in the water cannot be completed, as well as the various organisms in the ocean.

Bacteria will not be able to use the carbon, nitrogen, phosphorus and other elements contained in dead animals, and the resources of life will be depleted, which will affect the development and evolution of organisms, and life in the ocean will eventually disappear. Therefore, although marine bacteria are too small for the naked eye to see, they are the most important link in the ocean's vast and complex food chain.

Bacteria in the ocean generally have a luminescent effect, which is called bacterial luminescence. Bacterial luminescence belongs to bioluminescence, which is a peculiar phenomenon of respiration. Scientific experiments have shown that bacterial luminescence is the result of the enzymatic oxidation of a bacterial luciferin in the presence of oxygen.

After the luminescence reaction, the enzyme is continuously reduced to produce it, and then it continuously reacts with oxygen, so it can continuously emit light. The luminescent light of bacteria plays a great role, and people use the luminescent bacteria lamp made by cultivating bacteria to be used as a safe lighting for the powder magazine.

Marine bacteria can also produce a variety of pigments, among which yellow, orange yellow, and brown are more common.

In addition, marine bacteria participate in geological processes, influence the formation and properties of seafloor sediments, and play a major role in the generation, migration and accumulation of oil.

Marine bacteria are a large group of prokaryotic microorganisms, which do not contain chlorophyll and phycocyanin, and can only grow and reproduce in the ocean, and are the largest and most widely distributed marine microorganisms. They are generally no more than 1 micron in diameter, spherical, rod-shaped, spiral-shaped or branched-filamentous, with a tough and slightly elastic cell wall, and no eukaryotic. There are types of bacteria in the ocean, such as autotrophic and heterotrophic, light and chemoenergy, aerobic and anaerobic, parasitic and saprophytic, and planktonic and attached.

There are no more than 500 species of marine fungi, which account for only 1% of the number of terrestrial fungal species. There are only five known species of deep-sea fungi, and they are able to live in the depths of the ocean at depths of 5,315 meters.

Through the microscope, we can see the characteristics of marine bacteria. It is divided into three types: cocci with a spherical body shape; The body is elongated with bacilli; The crooked body is a spirocheta.

All of them are unicellular cells and have an internal structure similar to that of ordinary plant cells. If bacteria grow and multiply to a certain extent on the surface or inside a suitable solid medium, small groups are formed that are visible to the naked eye, called colonies. Colonies come with different colors like the colonies of Pseudomonas aeruginosa are green and the colonies of Staphylococcus are golden yellow.

The shape, size and color of bacterial colonies are important for the identification of bacterial species.

The process of marine bacterial ginseng and the degradation of various marine pollutants and toxins helps to maintain the balance of the marine ecosystem and promote the self-purification ability of the ocean. Marine bacteria are important producers of new antibiotics, amino acids, vitamins and other physiologically active substances.

Bacteria are involved in the formation of sedimentary rocks in the ocean, such as the formation of sulfur deposits and deep-sea manganese nodules. Bacteria play an important role in the process of ocean oil and gas formation.

Seawater has a bactericidal effect, which is due to the rapid death of terrestrial pathogenic bacteria due to the bacteriolytic effect of marine bacteria, and marine bacteria can be directly used as bait for marine economic animals, and bacteria participate in the corrosion, degeneration, pollution and destruction process of various marine substances.

Some marine bacteria are pathogenic bacteria of humans or marine organisms, and under certain conditions, the accumulation of metabolites of marine bacteria can poison the breeding environment, such as the accumulation of ammonia and hydrogen sulfide can harm biological farming. The metabolic activity of bacteria can also be used to improve the poisoned breeding environment, such as the oxidation of ammonia.