10 of the most dangerous and deadly infectious diseases

There are no good diseases, but there are diseases that are worse than others, especially Infectious diseases The deadly threat that represents humanity’s greatest fright, causing millions of lives to be killed in the most painful way within a few days, and modern science is still trying to find a cure for some of these. Infectious diseases The deadly ones that have challenged scientific development so far, and in this article you will learn about the 10 most dangerous ones Infectious diseases fatal.

While it is an environmental imperative that causes of Infectious diseases In order to spread more efficiently, there is no clear reason for the occurrence of some of these deaths and the elimination of the host (the organism), and you might think that it is in the interest of the infectious agent to keep its host alive for as long as possible to spread to as many individuals as possible, but diseases The following causes death within a few days.

10. Influenza

fatal infectious diseases

Most people consider influenza to be an unpleasant disease. Influenza was responsible for one of the most devastating pandemics of all time, the Spanish Flu (1918-19) that killed up to 100 million people. A particular type of influenza strain (H1N1) was unusual. Most deaths are among the young and the healthiest, and the flu appears to have actually turned a healthy body’s immune system on itself, creating a so-called cytokine storm or cytokine syndrome that attacked the lungs.

The last flu that made the headlines was swine flu, a new type of H1N1 strain. The deaths have already occurred and it appears to be particularly harmful, but nothing compared to the scale of the Spanish flu. Perhaps the most feared reason for the flu is its ability to recombine and mutate to form new strains.

The most important of these concerns is that a severe strain will combine with a highly transmissible strain, and this can happen even across species as is the case with H5N1 bird flu, and at the moment bird flu cannot pass from one person to another, but just a small genetic event that can open The road to a major epidemic.


fatal infectious diseases

AIDS from Infectious diseases The deadly virus infection, or acquired immunodeficiency syndrome, works by destroying the body’s defenses virtually for any number of diseases and other infections, and there is still no treatment or vaccine, and until recently there was no effective treatment, and so far more than 30 have died 1 million people are affected by AIDS, with nearly 40 million people infected.

HIV increases the chances of catching infections such as tuberculosis, toxoplasmosis, and hepatitis, and also raises the possibility of developing several forms of cancer, and new antiviral drug treatments have greatly increased life expectancy for people living with HIV and with However, the ever-changing nature of HIV makes it difficult to combat it.

The virus itself is already inserted into the DNA of your body’s cells, becoming part of your genetic template, and not only that, but it rapidly evolves inside the body to the point where you can make a chain of evolution from virus samples taken in different parts of the body.

8- Tuberculosis:

fatal infectious diseases

Tuberculosis is highly contagious and spreads easily through airborne droplets for example sneezing, and in fact, about a third of the world’s population is infected with tuberculosis, thank God it is in a latent form and it is possible that infected people can be unaware, and only 1 in 10 cases progresses to Active disease that has a mortality rate of up to 50% if not treated, tuberculosis kills about 1.5 million people worldwide each year, and is second only to malaria.

The disease primarily affects the lungs but can affect any part of the body including the testicles. The most common initial symptom is coughing up blood, followed by rapid weight loss. As the disease progresses, large areas of the lungs are necroticed and turned into a cheese-like substance. Extreme infection can lead to erosion in the pulmonary artery of the lung, which leads to the patient’s drowning in his blood.

Tuberculosis that infects the rest of the body (extrapulmonary tuberculosis) occurs in about 20% of cases, and this can affect the nervous system, urogenital system and bones, as can be seen in the picture above where it affects the spine and compresses itself, and in some cases it can invade Tuberculosis is multi-organ (Miliary TB) affecting the liver, spleen, brain as well as the lungs and this is a particularly dangerous condition, as most tissue damage in tuberculosis is caused by the body’s own immune system bombarding the affected area with a range of chemicals, so our list is not without Infectious diseases from tuberculosis.

7- Anthrax

fatal infectious diseases

Anthrax is a bacterial infection in most of its forms that is fatal. There are three ways a person can be infected and this is very important for how the disease progresses. The most deadly way is by inhalation. If the disease is not treated, it is already fatal. With immediate antibiotic treatment it is still Approximately half of those infected survive, and anthrax can be ingested through infected meat.

The initial symptoms of this form include vomiting blood and severe diarrhea, and the results are slightly better if prompt treatment is done with a mortality rate of up to (25-60%), and the bacteria can also spread through the cracked skin, and this causes severe ulcers and may lead to inflammation in the whole extremities. However, death is rare as the pathogen cannot penetrate the skin.

The active agent of anthrax is called a lethal toxin, although it is not actually fatal until it combines with the ascitic agent and the protective antigen, and the combination causes extensive tissue destruction and haemorrhage with dark, non-coagulated blood from the bodily openings, and death occurs within a few days to two weeks.

Because anthrax is such a deadly contagious disease, an island in Scotland was uninhabitable for 50 years after the British government’s experiments on anthrax, and it had to be cleared before anyone could return to it. It is very difficult to eradicate anthrax spores through cremation;

6- Cholera:

fatal infectious diseases

Cholera is one of the most Infectious diseases It can be passed easily through contaminated food and water. Historically, cholera has devastated local communities, killing half of them. To date, cholera can kill approximately 120,000 people a year, and in the past it killed millions.

Cholera kills through rapid dehydration. Symptoms are nonstop vomiting and persistent diarrhea until you can’t do more. By one estimate, patients can produce up to 20 liters (5 US gallons) of diarrhea per day. Cholera is easy to treat with fluids and electrolytes. When treated, only 1% of infected people can be killed, and without treatment there is a chance of more than 60% of infected people will die, and the most dangerous strains can be killed within two hours if the patient is left untreated.

5- Staphylococcus bacteria:

fatal infectious diseases

MRSA, or methicillin-resistant Staphylococcus aureus, is particularly frightening because it renders modern medicine ineffective. This disease had the ability in ancient times to infect farmers with all kinds of boils and hideous skin diseases, but this germ is more than just a skin infection it was known to kill in within 24 hours.

There are a number of MRSA strains with some being more lethal than others (ST1: USA400 and ST8: USA300), but they have one thing in common: they are resistant to a wide range of the most widely used antibiotics available to humans, and are not easily treatable.

MRSA-related conditions:

* Necrotizing fasciitis: a condition that erodes the flesh and affects deeper layers of the skin.

Toxic shock syndrome: a systemic infection that can be fatal.

Necrotizing pneumonia: a flesh-eroding infection of the lungs.

Osteomyelitis: A painful infection of the bone.

* Sepsis: It can be a fatal infection of the bloodstream

* Endocarditis: infection of the heart

Methicillin-resistant Staphylococcus aureus (MRSA), one of the deadliest infectious diseases, can effectively eat your body with very few effective antibiotics and increase resistance, and it seems that the age of antibiotics is coming to an end, and a lot of this is due to people abusing it and overusing it. use it.

4- Rabies:

fatal infectious diseases

rabies from Infectious diseases It is always fatal if the infected person is not treated immediately after the bite, and if the intervention does not occur until after symptoms appear, there is an 8% chance of survival, and rabies kills around the world about 55,000 people, mostly in Africa and India, but it is still It is located in the United States and Europe.

Rabies affects the central nervous system first and eventually leads to disease in the brain, resulting in death. Symptoms include acute pain, violent movements, and uncontrolled agitation (mania, water panic) and this is seen as a state of panic when the patient is given fluids to drink until When thirsty it causes painfully sharp spasms of the muscles in the throat.

Perhaps the most well-known symptom is foam in the mouth resulting from excessive saliva production, and the incubation period for rabies varies greatly from a few days to several years, and unfortunately once symptoms start, death occurs within (2-10) days, and rabies can be carried by animals. Warm-blooded, but in the vast majority of cases it is due to a dog bite.

3- Smallpox:

fatal infectious diseases

Smallpox may be one of the most horrific of any disease, it may be a deadly contagious disease, and the classic look is the body that is covered with smallpox (fluid-filled blisters), and this is not limited to the skin either but can occur in the mouth and throat, and the disease has been present Since 10,000 BC and has been alone responsible for 300 million deaths since 1800, while the death rate is only about a third, most of the survivors suffer some scars with other complications including blindness, and the number of deaths is high although smallpox is highly contagious unbelievable.

The death rate depends on the type of disease, and among the four forms, malignant smallpox and hemorrhagic smallpox are usually fatal, and this is the most dangerous form of smallpox, and there are no ulcers of the skin, and instead there is bleeding under the skin that causes it to turn black, so it is called black smallpox, and this type Smallpox will kill in about 6 days. The good news about the deadly smallpox is that it has been officially eradicated. The world has been free of smallpox since 1976 with the last recorded case of two-year-old Rahima in Bangladesh.

2- bubonic plague:

fatal infectious diseases

The bubonic plague is called the black death, and it is from Infectious diseases The deadly plague that swept through medieval Europe and killed an estimated 100 million people, there were other plague epidemics including one in the sixth century that killed 50 million people throughout the Roman Empire.

Plague is spread by bacteria carried by rat fleas, and unfortunately, it also kills them, and symptoms occur within (2-5) days of the bite, and at first the lymph nodes near the flea bite swell like golf balls, and other symptoms include convulsions, seizures and the possibility of vomiting blood, and gangrene that occurs In the extremities it can cause the fingers, toes and nose to turn black, and it can change the color of the skin, with severe pain due to the disintegrating skin on a living person.

The bubonic plague still exists and sporadic cases occur even in the USA, and there have been major outbreaks in recent times like the one in 1946, the good news (relatively) is that it can be treated effectively if antibiotics are given within 24 hours, otherwise The mortality rate is over 60%.

1- Ebola:

fatal infectious diseases

Ebola from Infectious diseases There is evidence that Ebola can spread through the air. There is no cure, and there is no vaccine. Traumatic death is known to occur in over 90% of cases in some outbreaks. For these reasons, the Ebola virus outperforms any current disease. to become the most deadly infectious disease on the planet.

Ebola is actually a group of viruses that are native to Central Africa, and the first case reported in the mid-1970s appears to have been linked to the local food of bushmeat, i.e. indigenous wildlife, and one of the scary things about Ebola is that there is nothing certain about where it came from, and no one knows. For certain where it is located, it is assumed that there is a natural reservoir for the virus inside some animals, but the species is unknown.

Ebola virus infection begins with pain everywhere, including joints and muscles, abdominal cramps and headache, and a rash usually appears as well.