Typhoid fever is caused by Salmonella typhi a bacterium found in the infected human intestine. Since it has been dubbed as a strict human pathogen, they are not found in any other animal hosts. The typhoid bacteria integrate with the small intestine of the infected human hosts. Asymptomatic long-term colonization is seen commonly seen as an occurrence in infected hosts. As a result, the person suffering from typhoid fever becomes frequent carriers. Therefore, unhygienic food or even the conditions not deemed clean enough are potentially dangerous for the normal being of a person. Food, vegetables or water contaminated human feces by S. Typhi are the common sources of infection. S. Typhi infections mainly occur when the food or water gets contaminated by infected food handlers or due to poor personal hygiene getting ingested. The diagnostic labs in Delhi opines that the infectious dose for S. Typhi infections is low and these results in a low person-to-person spread. Moreover, the answer to the question of whether a relapse of typhoid can offer, the response is simple. Relapses can be a common thing to struggle with provided the antibiotics are not taken for a full 15 days. You suffering from relapse three times appear to be unusual. Therefore, it is strongly advised I would advise repeating a full laboratory test including Widal test, blood culture, etc. to confirm the diagnosis. Add to that it is not the case of typhoid alone. There could be other infectious conditions that should be ruled out carefully with adequate and essential laboratory tests.
What is the cause of typhoid recurrence?
Ineffective Treatment- It is well and truly known that antibiotics are key to treating typhoid. Therefore, the dosage of the same should be completed right on time or else the typhoid is sure to recur. What's more? If the patients fail to complete the full course of antibiotic treatment, they are likely to develop antibiotic resistance which requires stronger antibiotics for treatment. Hence, it goes without saying that the take all the prescribed doses of antibiotics meant for typhoid even if they begin to feel better within a few days of taking these drugs.
Vaccine Ineffectiveness- Typhoid is seen as a contagious disease and some countries also issue an advisory for people who travel regularly to countries where typhoid is common. Typhoid vaccines lack the cent-percent effectiveness, and patients who fail to observe other preventative measures may become re-infected with typhoid fever. Typhoid vaccines also have the tendency to lose its efficacy after several years, and people at risk require boosters every two years for inactivated vaccines, and every five years for live oral typhoid vaccines.
As such it is always advised that you seek proper treatment from your medical specialists especially for the cases which have the risks of typhoid recurrence. In tandem, there is also a need to check the underlying causes as some typhoid cases are also aggravated due to diseases like malaria. Therefore, a comprehensive test is always encouraged.