Fever and thrombocytopenia in a returning agricultural worker
A 34-year-old man is admitted to a district hospital in Ganja in late July with 4 days of fever to 39.2 C, severe headache, myalgia, and one episode of vomiting. He works seasonally in cotton fields near Imishli and recalls removing engorged ticks from his legs twice in the past month without gloves. Examination: temperature 38.9 C, blood pressure 105/65 mmHg, pulse 96/min, no rash, no neck stiffness, no focal neurology. Laboratory: platelets 62 x 10^9/L, leukocytes 3.1 x 10^9/L, AST 148 U/L, ALT 96 U/L, creatinine 98 micromol/L, CRP 12 mg/L. Rapid malaria test negative; blood cultures pending. The hospital has no PCR capability and the nearest reference laboratory is 4 hours away by road. The patient is clinically stable but anxious and asks to be discharged to attend his brother's wedding tomorrow.
1. Construct a prioritized differential diagnosis and justify the single most likely working diagnosis using the epidemiological and laboratory clues.
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The syndrome is a febrile illness with headache, myalgia, leukopenia, thrombocytopenia, and transaminase elevation in a patient with confirmed tick exposure in an endemic rural area during summer. The leading diagnosis is Crimean-Congo haemorrhagic fever (CCHF), because the combination of tick contact, thrombocytopenia, leukopenia, and raised AST/ALT is highly characteristic, and the Caspian region and southern lowlands are recognized endemic territory. The second tier is other tick-borne disease: rickettsiosis (usually with rash or eschar, absent here), anaplasmosis or ehrlichiosis (leukopenia and transaminases fit, but less severe thrombocytopenia), and Lyme disease (less acute, no erythema migrans). Third tier: leptospirosis from field water exposure, acute viral hepatitis, and dengue or West Nile fever. Malaria is made unlikely by the negative rapid test, though a thick smear should still be sent. The key reasoning step is that thrombocytopenia plus leukopenia plus hepatitis-pattern enzymes plus tick contact in an endemic zone is not a nonspecific viral picture; it mandates immediate infection-control precautions and notification while confirmatory testing is arranged. Do not anchor on 'viral infection' and observe without isolation.
2. The patient insists on leaving for the wedding. Decide how to manage this request, specifying the isolation, notification, and transport measures you would put in place.
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The request must be refused, but the refusal must be reasoned and documented, not authoritarian. CCHF is a high-consequence viral haemorrhagic fever transmitted by tick bite and by contact with blood and body fluids; a febrile viraemic patient at a crowded gathering is a public-health hazard and a danger to himself if he deteriorates far from care. Steps: (1) Place the patient in a single room with contact and droplet precautions plus eye protection for staff; use dedicated equipment and safe sharps handling. (2) Notify the territorial sanitary-epidemiological service immediately as a suspected CCHF case, in parallel with sending paired serum samples to the reference laboratory; do not wait for confirmation to isolate. (3) Explain the risk to the patient in plain language, acknowledge the family event, and offer alternatives such as a phone or video call and a written explanation to his family; document the discussion and the patient's response. (4) If he persists, escalate to the attending physician and hospital administration, and note that restriction of a patient with a dangerous communicable disease is a lawful public-health measure, not a violation of rights, provided it is proportionate, time-limited, and explained. (5) Provide symptomatic treatment, monitor platelets, clotting, and liver function, and avoid intramuscular injections and unnecessary invasive procedures. Arrange transfer to a facility with intensive care and barrier-nursing capacity if platelets fall or bleeding appears.
3. List the documentation and quality-of-care elements this admission must contain, and explain why each matters for legal and epidemiological accountability.
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Required elements: an admission note with time-stamped history including the tick exposures and dates; a documented differential and the reasoning for isolation; an isolation order with start time and precautions specified; a notification form to the sanitary-epidemiological service with the date and time sent and the receiving officer; a record of the conversation about discharge against advice, including what risks were explained and the patient's stated understanding; laboratory requests with collection times and the courier log for the reference laboratory; a daily monitoring chart for temperature, bleeding signs, urine output, and neurological status; and a medication chart showing doses, routes, and the rationale for avoiding intramuscular agents. Each matters for a distinct reason: the exposure history supports the diagnosis and the epidemiological investigation; the isolation order and notification timestamp prove the clinician met statutory duties and protect staff if a nosocomial exposure occurs; the capacity and counselling record is the legal defence if the patient later claims he was detained without explanation or discharged unsafely; the courier log closes the chain of custody for a high-risk specimen; and the monitoring chart is the evidence that deterioration would have been detected. Missing any of these converts a clinically sound admission into an indefensible one.