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Biomedical subjects

V Quagliarello

Publications and source records attributed to V Quagliarello.

9 recordsLinked to original sources

Human granulocytic ehrlichiosis in Connecticut: report of a fatal case.

We report a case of granulocytic ehrlichiosis in a 71-year-old man who presented with an acute febrile illness and subsequently developed multisystem organ dysfunction and sudden severe anemia with thrombocytopenia requiring intensive care, mechanical ventilation, hemodialysis, and transfusions. The diagnosis was suspected on the fifth hospital day after a peripheral blood smear was examined; intracytoplasmic inclusion bodies were present in granulocytes only. Results of serological tests of acute and convalescent sera confirmed the diagnosis of granulocytic ehrlichiosis. We discuss the features of this case that were similar to those of published case reports as well as the course and outcome of treatment. This, to our knowledge, represents to first documented case of human granulocytic ehrlichiosis to occur outside the Upper Midwest. Because of the possible epidemiological association of Ehrlichia species with the deer tick Ixodes scapularis (dammini), this case raises additional concern for clinicians and patients in regions where Lyme disease is endemic.

Aged↗

Group B streptococcal meningitis in adults.

Group B streptococcal (GBS) meningitis is a frequent entity in neonates but an uncommon cause of meningitis in adults. Retrospective analysis at our institution identified 4 adult cases over the last 25 years; an additional 46 cases from the literature were reviewed. A bimodal age distribution paralleling that seen in other severe GBS infections was observed. Clinical presentation was not unlike meningitis due to other pyogenic organisms, although a higher percentage of patients presented with less than 24 hours of symptoms. Forty-three percent of patients had no underlying illnesses. Concomitant bacteremia was present in 83% of patients. The overall mortality was 27% and was limited exclusively to patients with co-morbid illnesses. Meningitis in adults due to GBS should be considered in the immunocompetent as well as the immunocompromised host.

Adult↗

Adjunctive therapy in bacterial meningitis--what make sense?

Bacterial meningitis continues to cause morbidity and mortality despite bactericidal antibiotic therapy. Experimental studies of pathophysiology reveal the bacteria and their surface components within cerebrospinal fluid (CSF) induce the release of inflammatory cytokines that promote CSF inflammation, injure the cerebral microvasculature and cause brain edema. Adjunctive corticosteroids reduce inflammation, ameliorate the pathophysiology, and improve neurologic outcome in children. Practical recommendations are made for children and selected adults regarding current and future directions of adjunctive therapy.

Animals↗

Endovascular infections arising from right-sided heart structures.

Endovascular infections that involve the right side of the heart present their own unique etiologies, pathophysiologies, clinical manifestations, and therapeutic issues. The pathology of the vegetations of right-sided endocarditis is identical to that of left-sided endocarditis. These vegetations are irregular, friable masses of varying size the contain platelets, fibrin, RBCs, and microorganisms. These lesions serve as a nidus for deep-seated infection and produce sustained bacteremia. Right-sided endocarditis occurs in 5% to 10% of all cases of endocarditis. The most common predisposing factors are IV drug abuse and congenital heart disease. S. aureus is the most common pathogen. The clinical manifestations include fever, chills, rigor, dyspnea, pleuritic pain, productive cough, and hemoptysis. The cardiac manifestations can be notably absent early in the course of the disease, with only 20% of patients initially showing a significant murmur on physical examination. Peripheral embolic lesions can be seen. Echocardiography is helpful in identifying vegetations on the tricuspid valve in a significant proportion of patients. The chest radiograph is characteristic, showing features typical of multiple septic pulmonary emboli. The radiograph shows multiple, small, fuzzy, patchy, peripherally located densities that can change rapidly on serial films. Complications of right-sided endocarditis include pulmonary infarction, pulmonary abscess, progressive right-sided heart failure, and renal abnormalities. The treatment of right-sided endocarditis includes prolonged therapy, with high doses of IV bactericidal antibiotics. Four weeks of antibiotic therapy is generally required, but newer regimens using combination antibiotic therapy can be successful in sensitive strains of viridans group streptococci and S. aureus. Surgical resection of the tricuspid valve is recommended for organisms that do not respond to initial antibiotic therapy, fungal endocarditis, resistant relapsing organisms, or coexistent infection with S. aureus and P. aeruginosa. The prognosis of right-sided endocarditis is generally favorable when compared with left-sided endocarditis. The prognosis is especially favorable in IV drug abusers infected with S. aureus. Patients infected with fungal organisms, Pseudomonas or Serratia, have a worse prognosis. The presence of significant right-sided heart failure also imparts a worse prognosis.

Anti-Bacterial Agents↗

The Acquired Immunodeficiency Syndrome: current status.

A recently recognized syndrome of acquired immunodeficiency (Acquired Immunodeficiency Syndrome-AIDS) has arisen since June 1981. It has received international attention. The clinical spectrum consists of repeated opportunistic infections, rare malignancies, and autoimmune phenomena, occurring in previously healthy adults with no history of an immunologic disorder. The population subset at risk for this syndrome appears to be predominantly homosexual American males and intravenous drug abusers with rare cases being reported in heterosexuals, hemophiliacs, and foreign patients, especially Haitians. The immunologic aberrancy in all patients described appears limited to T-lymphocyte hyporesponsiveness and imbalance of T-helper and suppressor cells. This disordered immunoregulation is a consistent finding in all reported cases and appears to predispose to the opportunistic infections and malignancies which have been associated with a 40 percent mortality. The underlying factor responsible for the immunoregulatory defect is unknown but possible etiologies include a transmissible infectious agent, drug use, chronic antigen stimulation, and spermatozoa exposure. Treatment of the associated infections and malignancies has been a frustrating endeavor as many patients respond incompletely or relapse soon after successful treatment course. Preventive measures, including patient education, physician awareness, and immunomodulating agents, are discussed.

Acquired Immunodeficiency Syndrome↗