Typhoid fever, caused by the bacterium Salmonella Typhi, is treated primarily with antibiotics, but which antibiotic works best depends heavily on where the infection was acquired and what drug-resistance patterns exist there. For decades, chloramphenicol was the standard treatment. Today, azithromycin and ceftriaxone are the most widely recommended options, though the emergence of extensively drug-resistant strains in parts of South Asia has narrowed the effective choices even further. The story of typhoid treatment is really a story about staying one step ahead of a pathogen that keeps adapting.
The Antibiotics That Still Work
The older drugs that once formed the backbone of typhoid treatment have largely lost their reliability. Chloramphenicol, ampicillin, and trimethoprim-sulfamethoxazole were the original first-line agents, but multidrug-resistant strains rendered all three ineffective across much of South Asia and parts of Africa.1Clinical Microbiology and Infection. Treatment of typhoid fever in the 21st century: promises and shortcomings Fluoroquinolones like ciprofloxacin replaced them for a while, but decreased susceptibility to those drugs has now also become widespread in endemic regions.
That leaves two antibiotics carrying most of the weight today. Ceftriaxone, given intravenously or intramuscularly, remains effective against the majority of Salmonella Typhi strains and is commonly used in hospitals. A Cochrane review of available trials found that ceftriaxone is effective for both adults and children, with few side effects, and performs comparably to azithromycin and fluoroquinolones where those drugs still work.2Cochrane Database of Systematic Reviews. Cephalosporin antibiotics for the treatment of enteric fever Azithromycin, taken orally once daily, has become a go-to option for uncomplicated typhoid, particularly in outpatient settings and in children. In a trial comparing the two, about 91% of children treated with azithromycin and 97% treated with ceftriaxone were cured, though four of the ceftriaxone-treated patients later relapsed, while none of the azithromycin patients did.3PubMed. Azithromycin versus ceftriaxone for the treatment of uncomplicated typhoid fever in children
One interesting wrinkle: chloramphenicol, the very first drug used against typhoid and long abandoned due to its bone marrow toxicity and resistance problems, has been making a quiet comeback in some developing countries. In areas where current strains have lost the resistance genes that once made chloramphenicol useless, clinicians are turning back to it as a cheap and locally available option.4Clinical Microbiology and Infection. Treatment of typhoid fever in the 21st century: promises and shortcomings It is a somewhat ironic development: the oldest typhoid drug rotating back into use because the resistance landscape shifted again.
Why Resistance Keeps Outrunning the Drugs
The biggest threat to typhoid treatment is antimicrobial resistance, and the problem has been accelerating. Decades of widespread antibiotic use have driven the evolution of multidrug-resistant and, more recently, extensively drug-resistant (XDR) strains.5PubMed Central. Extensively Drug-Resistant (XDR) Typhoid: Evolution, Prevention, and Its Management Since 2016, an XDR outbreak strain in Pakistan has been resistant to chloramphenicol, ampicillin, trimethoprim-sulfamethoxazole, ciprofloxacin, and ceftriaxone/cefixime simultaneously. This strain carries a gene that produces an enzyme capable of breaking down the cephalosporin antibiotics that were serving as the safety-net option.6PubMed Central. What Should We Be Recommending for the Treatment of Enteric Fever? For patients infected with XDR typhoid, azithromycin and carbapenems (a class of last-resort antibiotics) are essentially the only remaining choices.
Ciprofloxacin resistance has been studied in particular detail. The bacterium evades the drug through mutations in its DNA-handling enzymes, which reduces the drug’s ability to bind to its target. Research has identified specific mutations that individually cause partial resistance, but when combined with a gene that actively pumps ciprofloxacin out of the bacterial cell, the result is full resistance.7Heliyon. Genetic and in-silico approaches for investigating the mechanisms of ciprofloxacin resistance in Salmonella typhi Even in travelers returning to high-income countries, ciprofloxacin-resistant typhoid isolates have been documented. Nine such isolates were identified among samples submitted to the US National Antimicrobial Resistance Monitoring System over a decade.8PubMed Central. Ciprofloxacin-resistant Salmonella enterica Serotype Typhi, United States, 1999-2008
Severe Typhoid and the Role of Steroids
Most typhoid patients recover with antibiotics alone, but a fraction become severely ill, developing delirium, shock, or impaired consciousness. For those patients, antibiotics by themselves are not enough. A landmark trial found that adding high-dose dexamethasone, a powerful steroid, to standard antibiotic treatment dramatically reduced death rates in severe typhoid. Among patients receiving dexamethasone, about 10% died, compared with roughly 56% in the placebo group.9PubMed. Reduction of mortality in chloramphenicol-treated severe typhoid fever by high-dose dexamethasone This was one of the starkest mortality differences ever observed in a randomized trial for an infectious disease. The authors were clear that dexamethasone is unnecessary for most typhoid patients but recommended it for anyone presenting with signs of severe illness such as stupor, coma, or hemodynamic shock.
This finding has held up for decades and remains part of clinical guidance for complicated typhoid. The steroid works by tamping down the destructive inflammatory response that drives organ damage in the most severe cases. It does not replace antibiotics; it buys the body time while the antibiotics do their job.
When Surgery Becomes Necessary
One of the most feared complications of typhoid fever is intestinal perforation, where the infection eats through the wall of the small bowel. This is a surgical emergency. The ileum, the last segment of the small intestine, is by far the most common site, affected in over 85% of cases in one large series from Tanzania.10PubMed Central. Typhoid intestinal perforations at a University teaching hospital in Northwestern Tanzania Most patients have a single perforation, and the standard surgical approaches are either closing the hole directly or removing the damaged segment of bowel and reconnecting the ends.
Outcomes depend heavily on how quickly patients get to the operating room and what shape they are in upon arrival. In the Tanzanian series, postoperative complications occurred in about 39% of patients, with wound infections being the most common. The mortality rate was roughly 23%, and delays in getting to the hospital, shock on arrival, and multiple perforations all predicted worse outcomes.11PubMed Central. Typhoid intestinal perforations at a University teaching hospital in Northwestern Tanzania A smaller study from India reported better results, with just one death among 22 surgically treated patients, most of whom received segmental resection followed by reconnection of the bowel.12PubMed Central. Outcome of surgical treatment of intestinal perforation in typhoid fever
Aggressive fluid resuscitation during and after surgery makes a significant difference. One study found that increasing intraoperative fluid volumes from less than 10 mL per kilogram to more than 10 mL per kilogram lowered overall mortality from 43% to 14%, mainly by preventing early deaths within the first 24 hours.13PubMed. Aggressive fluid resuscitation and broad spectrum antibiotics decrease mortality from typhoid ileal perforation After perforation surgery, some patients need intensive care management for sepsis or septic shock.14PubMed Central. Typhoid perforation: Post-operative Intensive Care Unit care and outcome
Relapse and Chronic Carriage
Even after apparently successful treatment, typhoid has a clinical relapse rate estimated at 5% to 20%.15Journal of Infection in Developing Countries. Factors associated with typhoid relapse in the era of multiple drug resistant strains A relapse means a return of fever and symptoms after initial improvement, usually within a few weeks of finishing antibiotics. Molecular studies have confirmed that most relapses are caused by the same bacterial strain from the original infection, though occasionally a person picks up a new strain entirely.16PubMed. Molecular typing of multiple-antibiotic-resistant Salmonella enterica serovar Typhi from Vietnam Among patients infected with multidrug-resistant strains, constipation at presentation and seeking care within the first two weeks of fever were associated with a higher risk of relapse.17Journal of Infection in Developing Countries. Factors associated with typhoid relapse in the era of multiple drug resistant strains
A separate problem is chronic carriage, where a small percentage of people continue to shed Salmonella Typhi in their stool for months or years after recovering. These carriers often harbor the bacteria in biofilms inside the gallbladder. Fluoroquinolones are the best-studied treatment for eradicating carriage, with about 92% of patients clearing the bacteria after one course, compared with 68% for amoxicillin or ampicillin.18PubMed Central. Antimicrobial agents for the treatment of enteric fever chronic carriage: A systematic review But in an era where fluoroquinolone resistance is rising, treating carriers gets harder. Experimental work in mice has explored a dual-therapy approach that combines a biofilm-disrupting compound with ciprofloxacin; the combination reduced gallbladder bacterial loads by three to four and a half orders of magnitude, while using the biofilm agent alone actually worsened outcomes by releasing bacteria into the bloodstream.19PLOS Pathogens. A dual-therapy approach for the treatment of biofilm-mediated Salmonella gallbladder carriage This is still preclinical, but it underscores a key principle: treating the biofilm without simultaneously killing the freed bacteria can do more harm than good.
Azithromycin in Children and Resource-Limited Settings
Azithromycin has taken on particular importance for children with typhoid, especially in areas where fluoroquinolones are either resistant or avoided in young patients due to safety concerns. A study comparing azithromycin and cefixime in children found that azithromycin achieved clinical cure in about 81% of cases, compared with 50% for cefixime.20Pakistan Journal of Health Sciences. The Effectiveness of Azithromycin versus Cefixime in the Treatment of Typhoid Fever in Children Because azithromycin is oral, given once daily, and does not require refrigeration or injections, it is practical for outpatient treatment in settings with limited healthcare infrastructure. The Cochrane review’s finding that cefixime may not perform as well as fluoroquinolones further supports the case for azithromycin as a first-choice oral drug.21Cochrane Database of Systematic Reviews. Cephalosporin antibiotics for the treatment of enteric fever
There is a real worry, however, about what happens if azithromycin resistance becomes widespread. Azithromycin is already one of the only oral agents that reliably treats XDR typhoid. If resistance to it emerges and spreads, outpatient treatment could become extremely difficult, forcing patients into hospitals for intravenous carbapenems or meropenem, which are expensive, hard to access, and need careful monitoring.
The Diagnostic Problem
Treatment decisions for typhoid are only as good as the diagnosis. In many endemic areas, blood culture, the gold standard, is unavailable or takes days to yield results. Rapid diagnostic tests exist, but their performance has been uneven. A study in Ghana found that a commonly used rapid test had suboptimal accuracy, leading to a real risk of misdiagnosis and inappropriate antibiotic use.22PubMed Central. Diagnostic performance of Typhidot RDT in diagnosis of typhoid fever and antibiotic resistance characterisation in a cross-sectional study in Southern Ghana Expert consensus from a Delphi survey has called for next-generation rapid tests that can detect both Salmonella Typhi and Paratyphi, ideally combined with malaria testing, since these febrile illnesses overlap clinically and are common in the same regions.23BMJ Global Health. Redefining typhoid diagnosis: what would an improved test need to look like?
The connection between poor diagnostics and resistance is direct. When clinicians cannot confirm whether a fever is typhoid, malaria, or something else, they tend to prescribe antibiotics empirically, often broad-spectrum ones. That drives selective pressure for resistance. Better point-of-care diagnostics would not just improve individual patient outcomes; they would slow the arms race between drugs and bacteria.
Vaccination as a Treatment-Sparing Strategy
Prevention and treatment are deeply intertwined for typhoid. Typhoid conjugate vaccines (TCVs), recommended by the WHO since 2018, protect individual recipients but also reduce the overall volume of antibiotic-resistant infections in a population. A modeling study estimated that routine TCV vaccination with a catch-up campaign in 73 Gavi-eligible countries could prevent roughly 53.5 million cases of antimicrobial-resistant typhoid over ten years, including about 42.5 million cases involving fluoroquinolone non-susceptibility and 21.2 million with multidrug resistance.24PubMed Central. Estimating the effect of vaccination on antimicrobial-resistant typhoid fever in 73 countries supported by Gavi India and Nigeria stood to benefit most, reflecting where resistant strains are concentrated.
The real-world impact on prescribing has been more modest so far. A study following a mass TCV campaign in Harare, Zimbabwe, found that while clinicians perceived fewer typhoid cases after vaccination, the overall rate of antibiotic prescriptions did not significantly decline.25The Lancet Infectious Diseases. The effect of a comprehensive typhoid conjugate vaccine campaign on antimicrobial prescribing in children in Harare, Zimbabwe This highlights a gap between reducing disease and changing clinical behavior, particularly in settings where empiric antibiotic prescribing is deeply ingrained and alternative diagnoses are hard to confirm.
Experimental Approaches on the Horizon
Researchers are exploring several novel strategies for a future where conventional antibiotics may no longer suffice. Bacteriophage therapy, which uses viruses that specifically infect and kill bacteria, has shown promise in animal models. A study in mice found that a phage targeting Salmonella Typhi significantly improved survival after infection and reduced tissue inflammation, both when given before and after bacterial exposure.26PubMed Central. Controlling the bacterial load of Salmonella Typhi in an experimental mouse model by a lytic Salmonella phage STWB21 Phage therapy has a theoretical advantage over antibiotics: phages evolve alongside their bacterial targets, potentially keeping pace with resistance in ways that static drug molecules cannot.
Another line of research focuses on host-directed therapies, compounds that do not kill the bacteria directly but instead supercharge the infected person’s own cells to clear the pathogen. One such compound reduced Salmonella loads inside immune cells by eight- to tenfold in lab experiments and worked against both antibiotic-sensitive and resistant strains.27PubMed Central. Identification of a Host-Targeted Compound to Control Typhoid Fever A related approach tested a drug called AR-12, which triggers the cell’s own recycling machinery to trap and destroy intracellular Salmonella. In mice, oral AR-12 reduced bacterial loads in the liver and spleen and prolonged survival.28PubMed Central. Eradication of intracellular Salmonella enterica serovar Typhimurium with a small-molecule, host cell-directed agent Because these compounds work through the host rather than the bacterium, resistance is theoretically much harder for the pathogen to develop. None of these approaches are ready for clinical use, but they represent genuinely different strategies rather than incremental tweaks to existing antibiotics.
The Financial Burden of Getting Sick
The cost of a typhoid episode varies enormously depending on where you are, what strain you have, and how complicated your illness gets. A scoping review of studies in low- and middle-income countries found that the average total cost of a typhoid episode ranged from about $23 in India to $270 in Indonesia, with outpatient-only episodes on the lower end and complicated cases far higher.29PLOS ONE. The cost of typhoid illness in low- and middle-income countries, a scoping review of the literature XDR typhoid in Pakistan carried a median cost of about $223 per episode, reflecting the need for more expensive antibiotics and longer hospital stays. These figures may sound modest by high-income-country standards, but in settings where many families earn only a few dollars a day, a hospitalization for typhoid can be financially devastating.
Traditional Plant-Based Remedies
In parts of West Africa, where access to formal healthcare can be limited, traditional herbal remedies remain widely used for typhoid. A systematic review identified 232 plant species from 66 families used in Nigeria to treat the disease, with mango (Mangifera indica), papaya (Carica papaya), and neem (Azadirachta indica) among the most common. Leaves were the most frequently used plant part, and decoction was the preferred preparation method. Laboratory testing found anti-Salmonella activity in 81 of these species, and a few showed potency at very low concentrations.30Journal of Herbal Medicine. Medicinal Plants Used in the Treatment of Typhoid Fever in Nigeria: A Systematic Review
Documenting these plants matters for two reasons. First, some may eventually yield compounds worth developing into drugs, much as artemisinin, the frontline malaria treatment, originated from a traditional Chinese herb. Second, understanding what people are actually using helps public health programs meet communities where they are rather than simply telling them their practices are wrong. That said, no herbal preparation has been tested in clinical trials for typhoid, and relying on plant remedies instead of proven antibiotics for a disease that can perforate the intestine or cause fatal sepsis carries serious risk. The lab activity of plant extracts against Salmonella in a dish does not mean those extracts reach effective concentrations in a person’s bloodstream when brewed as tea.