TYPHOID AND PARATYPHOID A AND B: THE RELEVANCE OF IMPROVING MEASURES FOR THEIR DETECTION AND TREATMENT

Salmonella enterica serovars Typhi and Paratyphi (S. Typhi and S. Paratyphi) are the cause of enteric fever, a potentially fatal systemic febrile illness. Regretfully, despite ongoing progress in the field, the disease's burden is still significant, mostly because of the worldwide proliferation of different drug-resistant strains of Salmonella. For the condition to be effectively controlled, a precise diagnosis is essential. Feverish bacterial diseases like typhoid and paratyphoid (enteric fever) are prevalent in many low- and middle-income nations. Due to widespread resistance to earlier, first-line antibiotics, the World Health Organization (WHO) currently advises therapy with azithromycin, ciprofloxacin, or ceftriaxone. Resistance patterns change over time and differ depending on the region. Ciprofloxacin is frequently ineffective in South Asia due to fluoroquinolone resistance. In Pakistan, enteric fever strains that are highly resistant to drugs have surfaced. Susceptibility to outdated first-line antibiotics, such chloramphenicol, has resurfaced in some parts of the world. The use of azithromycin and fluoroquinolones in the treatment of enteric fever has previously been the subject of a Cochrane Review; however, the use of cephalosporins has not been well examined, and the best course of action and length of treatment are unknown. The potentially serious and sometimes fatal bacteremic illnesses caused by Salmonella enterica serotypes Typhi, Paratyphi A, Paratyphi B (tartrate negative), and Paratyphi C are known as typhoid fever (for the Typhi serotype), paratyphoid fever (for the Paratyphi serotypes), and enteric fever. There are currently no diagnostic techniques for identifying asymptomatic carriers, and laboratory assays exhibit subpar sensitivity and specificity. To find more precise biomarkers for early detection and asymptomatic carrier detection, a number of research initiatives have used systemic techniques. The advantages and disadvantages of the enteric fever diagnostic tests that are now on the market, the progress of research toward better diagnostic tests, and the difficulties in finding new, optimal biomarkers and tests are all covered in this review.