Typhoid - Symptoms, Types, Causes & Diagnosis

Typhoid - Symptoms, Types, Causes & Diagnosis

Any gram-negative rod, including the typhoid bacillus, must have endotoxin to function. Typhoid strains' ability to infect humans appears to be boosted by the vi antigen. Given that endotoxin has numerous physiological and...


Any gram-negative rod, including the typhoid bacillus, must have endotoxin to function. Typhoid strains' ability to infect humans appears to be boosted by the vi antigen. Given that endotoxin has numerous physiological and pharmacologic effects, it is more difficult to identify its significance. In the course of these experiments, efforts were made to quantify volunteers with and without typhoid fever reactions to endotoxin's pyroxenic activity to learn more about the function of pure endotoxin in the pathogenesis of the disease.

When 0.25 kg of a purified endotoxin from S. typhoon was administered intravenously to healthy individuals, the volunteers developed chills, fever, headache, myalgia, anorexia, nausea, thrombocytopenia, and leukemia. These manifestations were strikingly similar to those observed in patients with typhoid fever. Repeated and increasingly larger daily doses of the endotoxin given intravenously led to increasing resistance to the pyroxenic and subjective toxic effects. Healthy subjects could thus be rendered solidly tolerant to intravenous doses of the endotoxin as large as 2.5 kg.


An infected person's pee after using the toilet will include Salmonella-type germs. They risk contaminating whatever food they touch if they don't properly wash their hands afterward. Anyone else who consumes this food could get sick as well. Less frequently, an infected individual may pass Salmonella-type germs in their urine.

Once more, if an infected person handles food without washing their hands thoroughly after urinating, they risk passing the infection to someone else who consumes the food. In places with poor sanitation, contaminated human feces can contaminate water sources. Those who ingest contaminated food or drink contaminated water may develop typhoid fever.

Additional methods of acquiring typhoid fever include:

Using a contaminated toilet and touching your mouth before washing your hands are other ways to catch typhoid fever. Other ways include eating seafood from a water source that has been contaminated with human waste, drinking contaminated milk, and engaging in oral or anal sex with someone who has Salmonella-type bacteria in their system.


The first signs of an infection are most likely to appear 1–3 weeks following exposure to the bacteria.

Early ailments

low-grade fever that rises over the day, possibly to 104 degrees Fahrenheit (40 degrees Celsius).

  • Chills.
  • Headache
  • Weakness and worn-outness
  • Muscular pain
  • Abdominal discomfort
  • Constipation or diarrhea
  • Rash
  • Individuals may also experience sweating, a cough, and a loss of appetite.

Later illness:

  • The condition may result in gastrointestinal issues a few weeks after symptoms first appear. Stomach pain is a potential ailment.
  • the stomach that has significantly increased in size.
  • Sepsis is an infection that develops in the intestines and spreads throughout the body.
  • In extreme situations, people may: confuse themselves not be able to focus on anything nearby.
  • being unable to react to their surroundings.
  • These problems pose a risk to human life.
  • After the fever has subsided, symptoms in some people may come back for up to a few weeks.


  • Myocarditis is the medical term for heart muscle inflammation
  • Inflammation of the heart's valves and walls is known as endocarditis.
  • Major blood vessel infection, also known as a mystic aneurysm Pneumonia.
  • Pancreatitis is the medical term for pancreatic inflammation.
  • A bladder or kidney infection. Infection and inflammation of the fluid and membranes around the brain and spinal cord are known as meningitis.
  • Psychiatric issues such as paranoid psychosis, hallucinations, delirium
  • Irritable bowel disease
  • Intestinal injury, and bleeding are two possible typhoid infections consequences.
  • The small intestine or large bowel walls of people with typhoid fever may also experience cell death. As a result, the gut's contents can enter the body. Sepsis, a disorder characterized by excruciating stomach pain, vomiting, and infection all over the body, could arise from it.
  • Later on in the illness, damage to the intestines can occur. These potentially fatal consequences need to be treated right away.
  • Typhoid fever affects millions of people every year and poses a serious threat to everyone on Earth.
  • The continents having the most cases or regular outbreaks include Africa and South Asia. Yet, there are cases documented elsewhere, typically as a result of travelers to and from these areas. If you work in or go to places where typhoid fever is common, especially if you are visiting relatives or friends, you are more likely to contract it if you live in a nation where it is uncommon. Individuals who are visiting loved ones could experience greater social pressure to consume alcohol or foods that carry greater risks. Managing Salmonella enteric stereotype type germs as a clinical microbiologist.


S. enterica, which can infect mice and other animal species that are easily treatable, has been the subject of a lot of recent research on Salmonella infection. Despite several monkeys having been experimentally infected, S. Typhi only infects humans. Studies comparing typhoid in humans with other servers, such as S.Gallium and S. Pullout, are useful because they show host restriction to other animals (in these cases, birds). Nonetheless, it could be argued that studies on mice utilizing promiscuous S. enterica, such as S. Typhimurium, have been less instructive in understanding the etiology of human typhoid fever.

The pursuing content of the method stimulates pathophysiology for the same:

Gastrointestinal Infection

Small intestine: Bacterium enters the mucosa of the small intestine via M cells or direct penetration, adhering to the mucosal cells via special proteins, invading mucosal M cells overlying the paper's patches, internalization in M cells of the ileum, translocation to underlying lymphoid tissue, and draining lymph nodes.

The systemic spread includes the transmission of S. type to the reticuloendothelial system; lymphatic and blood spread; replication within the reticuloendothelial system, including the spleen, liver, and bone marrow; and evasion of the immune system by hiding intracellularly within macrophages. resides and multiplies in the gall bladder in a chronic carrier state. Excretion in the urine and stool may infect other people.


Health and travel background Your symptoms, medical history, and travel history may lead your doctor to suspect typhoid fever. Growing Salmonella enteric-strain bacteria in a sample of your body fluid or tissue is frequently used to confirm the diagnosis.

Tissue culture or bodily fluids Your blood, feces, urine, or bone marrow are all used as samples. The material is put in a situation where bacteria can easily thrive. The typhoid bacteria are examined under a microscope in the growth or culture. The most accurate method for testing for Salmonella type is frequently a bone marrow culture.

The best method for diagnosing TF patients still involves isolating the causing bacteria via culture. Infected people can be cultured to determine whether they have typhoid, and while bone marrow culture has a higher sensitivity, blood culture is typically the most reliable method. A serological test known as the Tidal test, however, is the most frequently used in the majority of developing nations. In the section below, we go over the difficulties and the most used laboratory methods for typhoid detection in endemic regions.

Widal Tidal

The Widal Tidal test, created by Georges Ferdinand Tidal in 1896, aids in determining whether a patient's serum has Salmonella antibodies. In individuals with suspected TF, the Widal test measures agglutinating antibodies against the O and H antigens of S. Typhi. Salmonella infections cause patients to generate antibodies that are directed against the organism's antigens. Salmonella antigen exposure results in the production of serum antibodies, which agglutinate homologous antigen-carrying bacterial solutions. To detect the presence of antibodies, serum from the patient is combined with antigens made from Salmonella. Agglutination reaction denotes a favorable outcome, whereas absence denotes an unfavorable outcome. The number of acute- and convalescent-phase blood samples needed for the Tidal test should be nearly comparable.


Vaccination won't completely protect you; therefore, when visiting high-risk places, abide by the following recommendations:

Sanitize your hands: Washing your hands frequently in hot, soapy water is the best way to keep healthy. After using the restroom and before making food, wash your hands. For situations where access to soap and water is not possible, keep an alcohol-based hand sanitizer in your pocket.

Use only filtered water: Contaminated drinking water is a problem in areas where typhoid is common. Drink only bottled water, canned or bottled fizzy drinks, wine, and beer as a result. Compared to noncarbonated bottled water, carbonated bottled water is safer.

Request beverages without ice: To brush your teeth, use bottled water, and avoid ingesting water while taking a shower. Avoid consuming raw produce. Eat only peeled fruits and vegetables; do not eat unpeeled lettuce or other produce that may have been washed in contaminated water.

You might wish to stay away from raw foods to be safe. Choose hot food. Avoid eating anything that is kept or served at room temperature. Newly prepared, piping-hot food is likely less harmful than raw food. Be aware of the whereabouts of the medical specialists. Find out about the medical facilities that are available where you are going. Carry out a list of the names, locations, and contact information for healthcare professionals.

The following series of events make up the pathophysiology of typhoid fever:

Consume your antibiotics. When taking antibiotics, make sure to follow your doctor's recommendations and finish the entire prescription.

Regularly wash your hands. The single most crucial action you can take to prevent the infection from spreading to others is this: Particularly before eating and right after using the toilet, scrub thoroughly for at least 30 seconds using hot, soapy water.

Don't handle food. Until your doctor certifies that you are no longer contagious, refrain from cooking for others. You might need to take a test if you work with food to demonstrate that you are not exuding typhoid bugs.

You might also need to provide proof that you aren't shedding the bacteria if you work in the medical field.


Typhoid fever can only be effectively treated with antibiotic therapy. Common antibiotics prescribed Depending on where you contracted the infection, the medication you receive to treat typhoid fever may vary. Different antibiotics have various effects on different strains, depending on where they were collected. The use of these medications is optional.

The likelihood that typhoid fever would be moderate and curable at home with a 7–14-day course of antibiotic tablets increases with early diagnosis. More severe cases of typhoid fever frequently require hospital admission so that antibiotic injections can be given.

With the proper antibiotic therapy, the majority of patients will start to feel better within a few days, and severe outcomes are fairly rare.

The following antibiotics may be administered for typhoid fever: 

  • Fluoroquinolones: These antibiotics, which can be your initial option, include ciprofloxacin (Cipro). They prevent germs from self-replicating. Yet, some bacterial strains can survive medical intervention. The term "antibiotic-resistant" refers to these bacteria.
  • Cephalosporins: These antibiotics prevent bacteria from constructing cell walls. If there is antibiotic resistance, ceftriaxone is one type that is utilized.
  • Macrolides: This class of antibiotics prevents bacterial protein synthesis. If there is antibiotic resistance, one kind of antibiotic, azithromycin (Zithromax), may be utilized.
  • Carbapenems: Moreover, these antibiotics stop bacteria from forming cell walls. However, unlike cephalosporins, they concentrate on a distinct phase of that process. These medicines may be utilized in cases of severe illness that is resistant to other antibiotics.


  • First stage: Mild symptoms like a headache and a dry cough are possible during the first stage of typhoid fever. At this point, you might also be beginning to feel a little feverish.
  • Second stage: In this stage, you feel fatigued and have a distended stomach, as well as a high fever, fever nightmares, and hallucinations.
  • Third stage: Typhoid fever is now in a more serious stage. You can experience encephalitis, a brain infection, dehydration, fatigue, and abdominal bleeding from major intestine perforations.
  • Fourth stage: At this time, your temperature will be very high. You run the danger of developing many other health issues at this point, including pneumonia, meningitis, kidney failure, infection, inflammation of the heart or pancreas, and infection.

                               If you don’t stay positive you don’t do well