the Bacteria

The Biggest Threats


Salmonellosis is one of the most common infectious diseases with a high incidence in humans - the enteric or the typhus form are known.


cause serious damage to health


is now the most common bacterial pathogen of intestinal infections. Late effects such as arthritis or the disease of the peripheral nervous system, which leads to paralysis


Mold Poison. Aflatoxins have a severe liver-damaging effect and can greatly increase the risk of liver cell carcinoma even if they are consumed regularly but only in small amounts. Acute liver dystrophy can also occur. Even at concentrations well below 10 μg/kg body weight, the highly toxic effect of the molecule on the liver unfolds. In addition to humans, it also has a toxic effect on all other mammals, birds and fish, as well as amphibians. Since contact with fungal spores already increases the risk of cancer (breathing in the spores can lead to the development of bronchial carcinoma), extreme caution should be exercised in the event of fungal infestation - avoid inhalation at all costs.


Pathogens that are transmitted from animals to humans, usually via an intermediate step


Pathogens that are transmitted from animals to humans, usually via an intermediate step


The currently most well-known bacterium, which can lead to serious consequences. Legionnaires' disease causes an atypical pneumonia that is often confused with normal pneumonia. In some of the infected people, the disease leads to complete incapacity to work.


Tragically, many deaths occur every year - in a recent incident in New York, 12 people died out of around 100 sick people. According to the Robert Koch Institute, there are 15,000 to 30,000 legionella pneumonias in Germany every year. A milder form is PONTIAC fever, which, however, also causes severe symptoms in patients. Flu-like symptoms appear, runny nose, cough, sore throat, fever. Some of the patients also suffer from confusion, dizziness, photophobia and muscle pain.

Coli Bacteria

The numerous pathogenic strains trigger many infections, including hospital infections, blood poisoning and gastrointestinal diseases. In severe cases, the condition can lead to kidney failure and death.


The pathogenic types are very dangerous. They can form a neurotoxin that can lead to paralysis or death.


leads to diarrheal diseases with watery diarrhea

Coxiella burnetti

have a high resistance to chemical influences


Many enterobacteria are part of the healthy intestinal flora of humans and animals. However, they also occur everywhere in the environment (soil, water). Some are pathogens in humans and animals. They often occur as nosocomial pathogens (“hospital germs”) and infect people with a weak immune system.

Hepatitis A Virus
Hepatitis B Virus
Hepatitis C Virus
Hepatitis E Virus

Inflammation of the liver


Leads to severe dehydration, often resulting in hospitalization. Severe course of illness in children.


Pseudomonads are of great importance for medicine, as they are often resistant to antibiotics. In addition, with a high cell density, they are able to form a mucous film that protects them from antibiotics and scavenger cells. In patients with an intact immune system, they very rarely trigger diseases. However, if the immune system is weakened, the risk of illness is quite high. Therefore, pseudomonas are among the most dangerous germs in hospitals, where they are often responsible for infections of wounds, respiratory or urinary tracts, pneumonia or heart diseases. In patients suffering from cystic fibrosis, pseudomonas are the main cause of pneumonia.


The medically most important species is Pseudomonas aruginosa. Pseudomonads are also very common in private households. The pathogens are particularly common in sinks, faucet outlets, soap containers and flower vases. In the absence of or incorrect treatment, a course as sepsis is to be feared. A particularly high risk exists for patients with defects in the skin and mucous membranes. Exotoxins are released, which are toxins released by living bacteria. The fate of the Brazilian photo model Mariana da Costa was remembered as particularly tragic. After the diagnosis of kidney stones, a urinary tract infection was found, which spread.


Death occurred after the model's feet, hands and part of her stomach were removed. The internal bleeding was unstoppable. The cells were literally eaten up. Pseudomonas aeroginosa cause many serious diseases such as: pneumonia, urinary tract infections, skin infections, neonatal infections (neonatal sepsis), meningitis, umbilical infections, eye infections (contaminated contact lenses), ear infections, wound sepsis, etc.

Bacillus cereus

Bacillus cereus is a food poisoning bacterium. Vomiting toxin (emetic toxin, cereulide): The intake of the toxin-containing food leads to nausea and vomiting after 0.5 to 6 hours, more rarely to abdominal cramps and diarrhea. The toxin is insensitive to heat and will not be killed by pasteurization, but is sensitive to acid. A diarrhea toxin causes watery diarrhea 8 to 16 hours after ingestion of the toxin, which resolves after 12 to 24 hours.


The pathogenic types can trigger classic tuberculosis. Some species are found in man-made environments such as sewage, sewage sludge, or drinking water. Species such as Mycobacterium gordonae, M. chelonae subsp. chelonae and M. flavescens detected. The species M. gordonae, also known in English under the name "tap water bacillus", is probably the most common mycobacterium in drinking water.


Some species, such as M. kansasii and M. avium, are even able to grow in treated (distilled) drinking water and are difficult to remove from infected tap water systems, making them a significant hazard in hospitals as well.


The mode of action is poisoning, caused by enterotoxins, which are excreted by the pathogen as metabolites into the surrounding substrate. The toxins are proteinaceous in structure with molar masses. First salivation, then nausea, retching, vomiting and diarrhea. Vomiting and diarrhea can occur explosively at the same time.


In severe cases, dehydration, shock, the appearance of mucus and blood in stool and vomit, and hypokalemic muscle paralysis may occur. Death occurs only rarely, mostly in newborns. Staphylococci are the cause of many infectious diseases, poisoning and purulent wound infections.


Are the third most common causative agent of bacterial intestinal diseases. However, Yersinia enterocolitica, a feverish intestinal inflammation (also called yersiniosis) and Yersinia pseudotuberculosis are particularly dangerous for humans. Symptoms include inflammation of the lymph nodes in the intestines with acute abdominal pain.


The pain can be diffuse or localized in the lower right abdomen. Ersinia can affect the joints in the lower half of the body—knees, ankles, and toes. In some cases it can lead to what is known as reactive arthritis.


Coronaviridae is a virus family within the order Nidovirales. The viruses within the family are (technically) colloquially called "coronaviruses" ...


Norovirus infection is caused by the virus of the same name. Norovirus was first detected in the American city of Norwalk in 1968. That is why the norovirus was often called the Norwalk virus in the past. The norovirus is distributed worldwide and is extremely resistant to adverse environmental influences. They survive on surfaces for more than 12 hours and survive temperatures of up to 60 degrees. Many disinfectants are also not sufficiently effective against noroviruses. They are also very contagious, so even the smallest amount of virus is enough for a person to contract the norovirus. Even a single infected person can be enough to trigger a local epidemic.


Norovirus is transmitted directly from person to person. Transmission from animals to humans has not yet been proven. It is excreted in the stool or in the vomit. From there it usually gets into the mouth via the hands or objects (faecal-oral transmission). In addition, infection with norovirus is possible if fine droplets form during vomiting and get into the mouth or nose of another person through the air.

Bird flu (Influenza A H5N1)

Serious general illness and pneumonia - Avian influenza H5N1 is a viral disease in birds caused by the influenza A virus H5N1.

Swine flu (Influenza A-H1N1)

milder course of bird flu with involvement of the respiratory organs. Swine influenza (also known as porcine influenza or swine flu) is an acute respiratory infection in domestic pigs.

Coliform bacteria

Coliform bacteria, faecal coliforms or thermotolerant coliforms are lactose-splitting, gram-negative, optionally anaerobic, rod-shaped bacteria that produce acid and gases within 48 h at 35 °C. These include the genera Citrobacter, Enterobacter, Escherichia and Klebsiella. They are indicator organisms for the sanitary quality of water and a hygiene indicator in food production.

Herpes virus

Herpes labialis, genital herpes, chickenpox, shingles

Influenza virus

"true" influenza, avian influenza - The genera alpha, beta, gamma and delta influenza viruses of the family Orthomyxoviridae are enveloped viruses with a single-stranded, segmented RNA of negative polarity as their genome. The genera also include the causative agents of influenza or "real" flu.


Warts - Human papillomaviruses are a large group of viruses that can cause abnormal cell growth in humans and can cause precancerous lesions, cancer and genital warts. More than 120 types of HPV are known, of which around 14 have cancer-causing effects.


Measles, mumps, croup - The family Paramyxoviridae includes enveloped viruses with a single-stranded, linear RNA with negative polarity as their genome. The Paramyxoviridae family arose from the outdated taxonomic group of myxoviruses (Gr. myxa: slime) by delimitation (Gr. para: next to) from the "true myxoviruses" (Orthomyxoviridae).


Polio - The viruses in this family are among the smallest viruses, ranging in size from 22 to 30 nm, leading to the naming of the genome pico and rna.

Rabies virus

The rabies virus, scientifically Rabies lyssavirus, also commonly called rabies virus, is a nervous system attacking virus that causes rabies in animals and humans. The result is acute, life-threatening encephalitis (inflammation of the brain), which is usually fatal.


AIDS, leukemia - Retroviridae are viruses that have the ability to integrate their genome into the genome of the host cell.


Colds, colds - Rhinoviruses are RNA viruses from the Picornaviridae family. They trigger infections of the upper respiratory tract (e.g. rhinitis).



A roundworm that causes infections. It remains infectious for up to 30 years.


Are zoonoses, often transmitted via cat faeces (up to 1 million oocysts per gram of cat faeces), pregnancy toxoplasmosis is feared.

Dunkerian muscle flukes

The Dunker's muscle fluke is a parasitic fluke that infects the skeletal muscles and especially the adjacent fatty tissue and intermuscular connective tissue.

Fox tapeworm

In humans, infection with fox tapeworm eggs causes alveolar echinococcosis, a life-threatening worm disease. Unlike the infestation of regular intermediate hosts, the course of the disease in humans is insidious, and the incubation period can be up to 15 years.