[Fulminant course of leptospirosis complicated by multiple organ failure]

Fulminant hepatic failure and acute renal failure as manifestations of concurrent Q fever and cytomegalovirus infection: a case report

BACKGROUND

Coxiella burnetii is an obligate bacterial pathogen that causes Q fever. Cytomegalovirus (CMV) commonly exists as a latent infection in healthy people. Co-infection with both pathogens is rare.

CASE PRESENTATION

We report an immunocompetent 53-year-old male farmer who presented with fulminant hepatic failure and acute renal failure. Empiric antibiotic treatment with intravenous penicillin G and levofloxacin were given, but hepatic and renal functions continued to deteriorate. A subsequent test of serum immunoglobulin M was positive for CMV, and administration of gancyclovir led to gradual recovery. A diagnosis of acute Q fever was confirmed by indirect immunofluorescence assay (IFA) on paired serum samples to demonstrate a significant rise in antibody titers. Antibiotic treatment was adjusted accordingly.

CONCLUSION

CMV co-infection should be considered in patients with acute Q fever when they do not respond to standard antimicrobial agents.

Cardiac involvement in leptospirosis

Leptospirosis is a neglected global disease with significant morbidity and mortality. Cardiac complications such as chest pain, arrhythmias, pulmonary oedema and refractory shock have been reported in patients with severe disease. However, the frequency and extent of cardiac involvement in leptospirosis, are under-reported and poorly understood. Multiple factors may contribute to clinical manifestations that suggest cardiac involvement, causing diagnostic confusion. A variety of electrocardiographic changes occur in leptospirosis, with atrial fibrillation, atrioventricular conduction blocks and non-specific ventricular repolarization abnormalities being the most common. Electrolyte abnormalities are likely to contribute to electrocardiographic changes; direct effects on Na(+)-K(+)-Cl(-) transporters in the renal tubules have been postulated. Echocardiographic evidence of myocardial dysfunction has not been adequately demonstrated. The diagnostic value of cardiac biomarkers is unknown. Histopathological changes in the myocardium have been clearly shown, with myocardial inflammation and vasculitis present in postmortem studies. Nonetheless, the pathophysiology of cardiac involvement in leptospirosis is poorly understood. Cardiac involvement, demonstrated electrocardiographically or clinically, tends to predict poor outcome. No specific therapies are available to prevent or treat cardiac involvement in leptospirosis; current management is based on correction of deranged homeostasis and supportive therapy. Evidence suggests that direct myocardial damage occurs in patients with severe leptospirosis, and further studies are recommended to elucidate its pathophysiology, clinical features and contribution to overall prognosis, and to identify appropriate diagnostic investigations and specific therapies.

[Severe febrile illness with renal impairment after travel to Southeast Asia]

HISTORY

A 40-year-old teacher fell ill one week after returning from a two weeks back-packing trip to Thailand and Laos. He developed high fever, severe headache, myalgias and a conjunctivitis.

INVESTIGATIONS

CRP and liver enzymes were elevated. The patient developed acute renal failure. Total leucocyte count was normal but the differential count showed an extreme left shift. Imaging procedures revealed hepato-splenomegaly and enlarged kidneys. TREATMENT, COURSE AND DIAGNOSIS: The patient was treated with moxifloxacin and ceftriaxon based on the initial suspicion of a severe infection potentially due to leptospirosis. This treatment led to a rapid improvement of the patient's condition and also of the laboratory findings. Leptospirosis could be confirmed by the seroconversion of specific antibodies to L. grippotyphosa 2 1/2 weeks after onset of complaints (initial serology negative).

CONCLUSIONS

In febrile travelers returning from Southeast Asia, leptospirosis has to be considered especially in case of severe headache, myalgias, elevated liver enzymes and renal failure and a history of close contact to potentially contaminated water (rivers, lakes). Diagnosis is confirmed by the detection of specific antibodies.

Severe pulmonary haemorrhage accompanying hepatorenal failure in fulminant leptospirosis

Leptospirosis is a re-emerging spirochetal zoonosis with a worldwide distribution affecting both animals and humans. The clinical syndromes may vary from a subclinical infection to a severe illness. Although it may potentially have a fulminant and fatal course, leptospirosis usually remains as an underdiagnosed cause of multiorgan failure. In this study, we report a patient with leptospirosis who presented with a fulminant course of diffuse alveolar haemorrhage and hepatorenal failure. His clinical condition deteriorated, despite appropriate antibiotic therapy and haemodialysis. However, he showed prompt clinical improvement when corticosteroids and plasma exchange were instituted in addition to the original therapy. We conclude that leptospirosis should be considered in any case presenting with pulmonary haemorrhage and hepatorenal failure. Plasma exchange and corticosteroids may be a choice of treatment in selected patients unresponsive to conventional therapy. Potential benefits of plasma exchange and corticosteroids may be based on a toxin- and/or cytokine-mediated pathogenesis of the disease.

Three cases of anicteric leptospirosis from Turkey: mild to severe complications

Leptospirosis is an acute generalized infectious disease, caused by spirochaetes, Leptospira interrogans. The severity of the disease ranges from an asymptomatic subclinical course to a fatal outcome. The three cases presented here were diagnosed serologically and had thrombocytopenia and acute renal failure as complication of anicteric leptospirosis. Our first case admitted with clinical presentation of pneumonia but clinical progress and laboratory findings made us to consider leptospirosis. The other two cases presented with aseptic meningitis were diagnosed as anicteric leptospirosis by the serological test results. One of the cases had fatal outcome but could not be strictly correlated with leptospirosis.

Thrombocytopenia complicating the clinical course of leptospiral infection

Leptospirosis can present with a wide clinical spectrum, and haematological manifestations are often apparent. We retrospectively analysed platelet counts in 49 patients with leptospirosis. Forty-three patients (87.8%) had thrombocytopenia. Mean baseline platelet counts rose from 69 x 10(9)/l to 151 x 10(9)/l following treatment. Haemorrhagic episodes were observed in 11 patients. Platelet nadir was 29 x 10(9)/l in the group experiencing bleeding and 64 x 10(9)/l in the remainder. Six patients died due to bleeding and one due to sepsis. Thirty-six patients (73.5%) had acute renal failure; their means platelet count was 46 x 10(9)/l. Liver enzyme levels were elevated in all patients. Thrombocyte count, liver enzyme levels and bilirubin levels were significantly correlated. Forty-three (87.8%) patients showed signs of sepsis; mean thrombocyte count was 46 x 10(9)/l in these patients, and 133 x 10(9)/l in those without sepsis. Multiple organ involvement and fulminant disease is usually associated with renal failure and/or thrombocytopenia in leptospirosis.