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Background: Botulism is a rare but potentially lethal disease in which ophthalmic signs and symptoms are among the very earliest manifestations. The aim of this study was to investigate the epidemiological and clinical features of botulism-infected patients admitted to a general hospital in Porto, Portugal. Methods: We performed a retrospective chart review of all botulism patients admitted to Silo Joao Hospital between January 1998 and January 2003. We excerpted data on epidemiology, ophthalmic and non-ophthalmic manifestations, and treatment. Results: We identified 18 patients in nine registered outbreaks. In two patients (11%), ophthalmic manifestations preceded systemic manifestations; in six patients (33%), ophthalmic and systemic manifestations occurred simultaneously; in ten patients (56%), systemic manifestations occurred first. Ophthalmologists had examined only seven patients and made the correct diagnosis in five. The most common ocular symptoms were blurred near vision (100%), blurred distant vision (94%), and diplopia (44%). Accommodation impairment was documented in all seven patients examined by ophthalmologists. Conclusions: Ophthalmic manifestations were among the earliest and most prominent manifestations of botulism in this series, as in earlier reports. The diagnosis should be suspected when impaired accommodation and gastrointestinal symptoms occur together.

We evaluated left ventricular function by echocardiography in a prospective study that included 98 consecutive human immunodeficiency virus (HIV)-infected patients and 40 HIV-seronegative normal controls. When compared with controls, HIV patients showed increased isovolumic relaxation time (101+/-18 ms versus 71+/-10 ms; p

We evaluated the effect of chronic Pneumocystis carinii pneumonia (PCP) prophylaxis, with a once a month dose of 300 mg of inhalatory pentamidine isethionate, on QT interval duration. We included 22 human immunodeficiency virus (HIV)-infected patients: 11 were on this medication and 11 were not. The two groups were matched for age, sex and HIV infection stage. No patient had any clinical condition or was under any medication known to affect the duration of the QT interval. The heart rate-corrected QT (QTc) was obtained by averaging the observations of three independent observers. QTc duration was similar in both groups. The time separating pentamidine administration and the performance of the ECG did not influence the results, neither did the duration of inhalatory pentamidine therapy. Our results suggest that inhalatory pentamidine does not prolong the QT interval duration and so, as opposed to what has been reported concerning intravenous pentamidine therapy, does not seem to induce an increased risk of torsades de pointes.

We prospectively studied, with 24-h Holter monitoring, 21 consecutive human immunodeficiency virus (HIV) infected patients, at all stages of the infection, in order to assess their dysrhythmic profile. Three (14.3%) patients presented one isolated run of supraventricular tachycardia, with10 beats, that was considered clinically irrelevant. No patient presented other clinically relevant supraventricular or ventricular tachy or bradydysrhythmias. One (4.8%) patient presented intermittent Mobitz type I second-degree AV block, two (9.5%) patients paroxistic 2:1 AV block and one (4.8%) patient presented a bifascicular block on the 12-lead ECG that persisted during the ambulatory recording. This study suggests that clinically relevant cardiac tachydysrhythmias are rare in our population of HIV infected patients. On the other hand we found an unexpectedly high incidence of cardiac impulse conduction disturbances.

Streptococcus pneumoniae is one of the leading causes of pneumonia and several other invasive diseases as well as upper respiratory tract infections. They are more prevalent and serious in elderly and in those with chronic diseases and with high morbidity and mortality. Invasive pneumococcal diseases can most effectively be prevented by vaccination. The vaccine is effective and safe, even after revaccination. Nevertheless, some adverse events can occur, the most frequent being local, mild and self-limited. Although unusual, serious systemic reactions can eventually have a great impact in the individual health. The authors report a clinical case of a 66 years old man who was vaccinated with polyvalent polysaccharide pneumococcal vaccine and who developed a serious local and systemic reaction, including leukemoid reaction and respiratory insufficiency. In this respect they make some comments regarding the value of this vaccine.

The aim of this study was to compare the T cell counting and viral load in seropositive women for HIV with normal cervical smear and intraepithelial lesions. 87 women were studied, 26 with normal smear, 46 with low grade intraepithelial lesions and 15 with high grade intraepithelial lesions. Women with normal smears showed the lowest viral load and high grade lesions the highest. There were no differences between cervical smear result and T cell counting.

Background and objectives. – Albeit, the NucliSens Extractor combined with the Ampliscreen was validated for application in NAT minipool screening, a study to evaluate the reliability of the procedure in relation to subtypes G of human immunodeficiency virus (HIV)-1 RNA and 4c/4d of hepatitis C virus (HCV) RNA should be performed, due to their genetic differences and the high frequency in our country. Study design. – Samples from patients infected with subtypes G of HIV-1 RNA and 4c/4d of HCV RNA were diluted with negative plasma and tested eight times for each concentration. For nucleic acid extraction we used an automated silica-based extraction method (NucliSens Extractor) and for amplification and detection the AmpliScreen HIV-1 version 1.5 and AmpliScreen HCV version 2.0 (Roche Diagnostic Systems) were applied. Results. – The sensitivity for HIV-1 RNA genotype G using the NucliSens-AmpliScreen method—95% detection limit (95% CI) of 25 (18–50) copies per ml—is comparable with those described for genotypes B and E and to that obtained by the Multiprep procedure. In the case of HCV, the sensitivity of the method was also similar, when we compared the detection limits obtained for genotype 4c/4d—95% detection limit (95% CI) of 34 (24–71) IU/ml—with the genotype 1 published. Conclusions. – The data presented here suggest that these infections will not be missed because of genetic variation, as the platform exhibited similar limits of detection for the subtypes evaluated, meeting the sensitivity requirements set by the regulatory bodies.

Perpetua Gomes and colleagues’ article on transmission of HIV-2 in Portugal deserves some comments due to features that in our experience could explain the acquisition and dissemination of this virus in our country. The authors report their experience at the Hospital Egas Moniz Lisboa in the south of Portugal where Africans from west Africa were followed. They described 57% of the patients as natives of Guinea-Bissau or Cape Verde; thus 43% were presumably of Portuguese origin. At the Hospital S Joao and School of Medicine Porto located in the north of Portugal from 1985 to September 2003 we have observed 132 (4%) HIV-2-positive patients among 3251 HIV-infected patients. Diagnosis was based on US Centers for Disease Control and Prevention/WHO criteria and all the tests for identification of HIV and monitoring of infection were done at the Molecular Biology Centre in our institution a reference laboratory for Portugal. (excerpt)

HIV-2 infection was diagnosed in two patients 15 and 24 years of age and, thereafter, in their mothers. Epidemiological data suggested that vertical transmission was the most probable mode of infection in both patients (Mota-Miranda A, et al.: AIDS 2001;15:2460-2461). Phylogenetic analysis of env C2-C3 sequences from the patients and their mothers was used in an attempt to confirm or exclude the events of perinatal HIV-2 transmission. Sequences from each putative transmission pair formed monophyletic clusters in phylogenetic analysis, a clear indication of common ancestry. Interpatient nucleotide distances increased with the period of infection being consistent with long-term infection. In conclusion, the results are consistent with an epidemiological linkage between the viruses infecting each mother-child pair and support the occurrence of perinatal HIV-2 infection in both cases. Application of similar phylogeny methods to other suspected transmission cases may permit a better understanding of the epidemiology and molecular evolution of HIV-2.

Study objectives Previous studies have showed that the pericardium is frequently involved in HIV infection. However, the characteristics and etiology of the pericardial abnormalities that have been found remained poorly defined. We analyzed the features of pericardial involvement in these patients and investigated the clinical variables associated with moderate and severe effusions. Design Prospective, clinical, and echocardiographic study. Setting The service of infectious diseases of a university hospital. Patients 181 consecutive patients at all stages of HIV infection. Results Only one patient (0.55%) had acute pericarditis. Seventy-five patients (41%) had an asymptomatic pericardial effusion; in 23 patients (13% of all patients), the effusion was either moderate or severe. Ten cases (5.5% of all patients) of moderate or severe effusions resulted in right atrium diastolic compression, and three of these cases (1.6% of all patients) required pericardiocentesis for the management of tamponade. Six patients (3%) presented with echogenic pericardial masses of undetermined etiology. A moderate or severe effusion was present in a greater number of patients with symptomatic HIV infection than was present in asymptomatic HIV-infected patients, respectively: 17 vs 2% (p = 0.015). The following are variables independently associated with moderate or severe pericardial effusions: heart failure (odds ratio, 20.3; p = 0.0001); Kaposi's sarcoma (odds ratio, 8.6; p = 0.01), tuberculosis (TB; odds ratio, 47.2; p = 0.0006); and other pulmonary infections (odds ratio,15.0; p = 0.02). Conclusions Most of these moderate or severe effusions are clinically unsuspected, but they can lead to life-threatening tamponade. This fact seems to justify echocardiographic surveillance in HIV-infected patients, especially in those with heart failure, Kaposi's sarcoma, TB, or other pulmonary infections.

Background: Some of the most frequent manifestations of heart involvement in human immunodeficiency virus (HIV) infection include right and left ventricular dysfunction. The pathogenesis remains obscure. Methods and Results: This prospective clinical and echocardiographic study involved 181 patients at all stages of HIV infection. We tested a set of clinical variables using a backward logistic regression model to assess their ability to independently predict the presence of ventricular dysfunction. The presence of pulmonary infections (all etiologies mixed) was the only variable independently associated with isolated right ventricular dysfunction (odds ratio = 4.08; P = .02). Signs suggestive of pulmonary arterial hypertension were present in 71% of the patients with right ventricular dilation. History of previous opportunistic infections (all etiologies mixed) (odds ratio = 10.9; P = .0026) and time since the diagnosis of acquired immunodeficiency syndrome more than 12 months (odds ratio = 6.6; P = .03) were the only two independent predictors of left ventricular dysfunction. Conclusions: Isolated right ventricular dysfunction may be secondary to pulmonary hypertension caused by repetitive pulmonary infections and not to primary myocardial disease. The aggressive treatment of opportunistic infections may become an important element of heart failure prophylaxis in HIV infection because they may be associated with left ventricular dysfunction.

We give details of a patient infected with HIV-2 which had what we believe to be the longest asymptomatic period so far reported. The infection was probably acquired through a blood transfusion in Africa 27 years ago. At present the patient remains asymptomatic and her cellular defence mechanisms, evaluated by CD4+ lymphocyte counts and hypersensitivity skin tests, are not severely compromised. HIV-2 has some distinct epidemiological, clinical and biological features which are different from the related HIV-1 and deserve investigation in order for its natural history to be better understood.

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