What Is a Stealth Virus?

Viral infection is an extremely complex and evolving biological and pathological process. The so-called types of viral infections in the body are all described from a certain aspect or angle, and of course they cannot fully reflect things. true colors. For example, the acute, subacute, and chronic types are distinguished according to the duration of the disease; the dominant and recessive infections are distinguished according to the obvious degree of the infection symptoms; Infections and systemic infections. This distinction is made only for the convenience of understanding, memory or work. It should also be noted that there is overlap and overlap between them. For example, systemic infections are divided into dominant infections and recessive infections. The same viral infection sometimes causes dominant infections, sometimes it causes recessive infections, and so on.

Recessive infection

Recessive infection (silentinfection) is also called subclinical infection. It means that after the pathogen invades the human body, it only causes the body to produce a specific immune response, does not cause or causes only slight tissue damage, so it does not show any symptoms, signs, or even biochemical changes in the clinic. Find.

Introduction to recessive infections

Includes all viral infections that do not cause clinical symptoms. It may be that the virus cannot eventually invade or reach the target organ and therefore does not present or rarely present with clinical symptoms. In other words, the struggle between virus invasion and body defense causes the virus to invade to an appropriate stage and is stopped. This type of infection is the most common and is the main source of natural anti-virus-specific immunity in humans and animals. At the same time, recessive infection has very important epidemiological significance. Recessive infected animals may still spread the virus to the outside world and become a source of infection. The occurrence of a recessive infection depends not only on the nature of the virus, but also on the immune biological status of the animal body. As mentioned above, the same virus may cause a dominant infection or a recessive infection. For example, Japanese encephalitis virus can cause acute lethal infections in humans and animals, such as horses.

Recessive infection However, in most humans and animal groups, the Japanese encephalitis virus is mainly a recessive infection. Although transient viremia may occur, it does not show obvious symptoms. After viremia, the virus quickly disappears from the body. Similar recessive infections are also found in many other viral infections, such as certain adenoviruses in humans and animals, and enterovirus infections.

Is there a normal virus spectrum like that in humans and animals? This is a very interesting question that needs to be explored. It is certain that the virus-bearing phenomenon in humans and animals is widespread. For example, many viruses such as reovirus, herpes virus, adenovirus, and small RNA virus and coronavirus can be found or isolated from healthy humans and animals. However, it should be pointed out that, unlike the normal bacterial spectrum in humans and animals, the presence of these viruses in the body, even if there may be no serious harm, will never bring any benefit to the body.

Recessive infection manifestations

When the body's immunity is strong, the number of pathogenic bacteria is small, and the virulence is weak, no obvious disease occurs, and it becomes a recessive infection. When the interaction between the pathogenic bacteria and the human immune system maintains a balance, the pathogenic bacteria lurk in the lesion and become latent Infection; when the body's immunity is weak, the number of pathogenic bacteria invades, and the virulence is strong, a significant illness appears and becomes a dominant infection.

Analysis of terms related to recessive infection

Recessive infection Mycoplasma infection

Mycoplasma is the smallest organism known to live freely, and it is also the smallest prokaryotic cell. It is a prokaryotic microorganism that is larger than the virus and smaller than the bacteria. Their outstanding feature is that they have no cell wall. As a result, cells are soft, morphologically variable, and highly polymorphic. Observation of Mycoplasma cells under the electron microscope showed that there was a cell membrane with ribosomes, RNA and circular DNA in the cells. Mycoplasma is widely present in soil, sewage, insects, vertebrates and humans, and is one of the pathogens of animals, plants and humans.

Mycoplasma is another micropathogen that is different from bacteria and fungi. There are more than 80 species of Mycoplasma. Mycoplasma related to humans include Mycoplasma pneumoniae (MP), Mycoplasma human (MH), Ureaplasma urealyticum (UU) and reproduction. Mycoplasma (MG), the former causes pneumonia, and the latter three cause urogenital infections.

After genitourinary tract infection with Mycoplasma, the disease caused by men is non-gonococcal urethritis, and women are mainly non-gonococcal urogenital tractitis. Men show urinary itch, burning sensation, and difficulty urinating, and a few have frequent urination. The urethral opening was slightly red and swollen, and the secretions were thin. Some patients were asymptomatic. Women show increased leucorrhea, burning urethra or causing pelvic inflammatory disease, salpingitis, etc. which cause infertility, abortion and ectopic pregnancy.

After mycoplasma and chlamydia infect the human body, they first invade columnar epithelial cells and grow and multiply in the cells, and then enter the cell proliferation of the monocyte macrophage system. As mycoplasma and chlamydia multiply in the cells, causing the death of infected cells, they can evade the host's immune defense function and get intermittent protection. The pathogenic mechanism of Mycoplasma and Chlamydia is to inhibit the metabolism of infected cells, lyse and destroy cells and cause the release of lysozyme, the cytotoxic effect of metabolites, causing allergies and autoimmunity.

When the human body is infected with Mycoplasma and Chlamydia, specific immunity is produced, but this immunity is weak and the duration is short. Therefore, Mycoplasma and Chlamydia infections are prone to cause persistent, repeated infections, and recessive infections. In terms of cellular immunity, most patients with active chlamydia that have been cured often cause delayed-type allergic reactions when given the corresponding antigen intradermally. This allergy can be passively transferred with lymphocytes. This immunity is likely to be mediated by T cells. In terms of humoral immunity, neutralizing antibodies appear in serum and local secretions after infection with Mycoplasma and Chlamydia. Neutralizing antibodies can prevent Chlamydia from adsorbing on host cells, and can also enhance the uptake of phagocytes through conditioning.

Mycoplasma and chlamydia in the female reproductive tract most commonly invaded the cervix, which can cause endometritis, salpingitis, pelvic inflammatory disease, and can also cause acute urethritis and vestibular glandular inflammation. If pregnant women are infected with mycoplasma and chlamydia, the fetus through the birth canal during delivery can cause neonatal ophthalmitis and pneumonia.

After infection with mycoplasma and chlamydia, women do not necessarily show symptoms. Even if there are symptoms, they may vary depending on the infection site. For example, cervical erosion, cervical mucosal edema, increased leucorrhea (purulent), Contact bleeding, etc., tubal infections can cause lower abdominal pain, low back pain and infertility. In general, these symptoms are not specific.

Mycoplasma and chlamydia can be transmitted through sexual contact, and can also be transmitted through hands, eyes, towels, clothing, baths, toilets, and swimming pools. Having sex with many people, the man has urethritis, and poor hygiene habits are all prone to infection. Therefore, the key to preventing infection is to cleanse yourself and improve personal health care.

Hidden infection bacterial infection

Bacterial infection is an acute systemic infection caused by pathogenic bacteria or conditional pathogens invading the blood circulation to produce toxins and other metabolites. It is clinically characterized by chills, high fever, rash, joint pain, and hepatosplenomegaly. Some may have septic shock and migrating lesions. Acute systemic infection caused by pathogenic microorganisms invading blood from wounds or infections in vivo. Clinically, some patients may experience irritability, cold limbs and cyanosis, thin pulse rate, faster breathing, and lower blood pressure. Especially the elderly, children, those with chronic diseases or immunocompromised, those who are not treated promptly and have complications, can develop into sepsis or sepsis.

Recessive infection advice

As long as you pay attention to developing good habits in daily life, work and rest, peace of mind, and proper exercise to strengthen your physique, you can generally increase the body's resistance and tolerance to pathogens, thereby avoiding the occurrence of disease.

In particular, parents should be careful of the hidden infection of hand, foot and mouth disease. Before entering the door, please pay attention to washing your hands, changing your clothes, and then getting close to your child. See cute children and be careful not to kiss their little mouths. In addition, parents should also pay attention to personal hygiene to avoid infection without knowing it.