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Cases of severe acute respiratory syndrome (SARS) were investigated for SARS coronavirus (SARS-CoV) through RNA tests, serologic response, and viral culture. Of 537 specimens from patients in whom SARS was [...]

Doctors in Hong Kong describe the symptoms of 10 patients who developed severe acute respiratory syndrome, or SARS. Symptoms include fever, dry cough, difficulty breathing, and damage to small sacs in the lungs called alveoli. Two of the patients developed respiratory failure and died.

Abstract Background Pneumocystis jiroveci pneumonia (PCP) is an important opportunistic infection among immunosuppressed patients, especially in those infected with human immunodeficiency virus (HIV). The clinical presentation of PCP in immunosuppressed patients have been well-reported in the literature. However, the clinical importance of PCP manifesting in the setting of an immunorestitution disease (IRD), defined as an acute symptomatic or paradoxical deterioration of a (presumably) preexisting infection, which is temporally related to the recovery of the immune system and is due to immunopathological damage associated with the reversal of immunosuppressive processes, has received relatively little attention until recently. Case presentation We aim to better define this unique clinical syndrome by reporting two cases of PCP manifesting acutely with respiratory failure during reversal of immunosuppression in non-HIV infected patients, and reviewed the relevant literature. We searched our databases for PCP cases manifesting in the context of IRD according to our predefined case definition, and reviewed the case notes retrospectively. A comprehensive search was performed using the Medline database of the National Library of Medicine for similar cases reported previously in the English literature in October 2003. A total of 28 non-HIV (excluding our present case) and 13 HIV-positive patients with PCP manifesting as immunorestitution disease (IRD) have been reported previously in the literature. During immunorestitution, a consistent rise in the median CD4 lymphocyte count (28/μL to 125/μL), with a concomitant fall in the median HIV viral load (5.5 log10 copies/ml to 3.1 log10 copies/ml) was observed in HIV-positive patients who developed PCP. A similar upsurge in peripheral lymphocyte count was observed in our patients preceding the development of PCP, as well as in other non-HIV immunosuppressed patients reported in the literature. Conclusions PCP manifesting as IRD may be more common than is generally appreciated. Serial monitoring of total lymphocyte or CD4 count could serve as a useful adjunct to facilitate the early diagnosis and pre-emptive treatment of this condition in a wide range of immunosuppressed hosts, especially in the presence of new pulmonary symptoms and/or radiographic abnormalities compatible with the diagnosis.

Presents a letter to the editor about inhibition of SARS-Associated coronavirus infection and replication by RNA interference.

A patient with light chain myeloma complicated by simultaneous Herpes simplex and Aspergillus fischeri pneumonia is presented. Microscopic examination of her bronchoalveolar specimen showed bronchial cells with cytopathic effects and numerous cleistotheca, the sexual reproductive structures of Aspergillus. Culture was positive for Herpes simplex virus and Aspergillus fischeri. The initial partial response to amphotericin B followed by complete clinical response with addition of intravenous acyclovir emphasized the importance of recognition of simultaneous infection by these 2 pathogens. This is the first report of identifying cleistotheca in the bronchoalveolar lavage specimen. [ABSTRACT FROM AUTHOR]