Human papillomavirus vaccines: a new challenge for pediatricians

La infección por virus del papiloma humano (VPH) es la enfermedad de transmisión sexual más frecuente en el mundo. Esta infección constituye una causa necesaria del cáncer de cérvix, se ha relacionado con otras formas de cáncer anogenital, de vía aérea y digestivo, y es además el origen de las verrugas anogenitales. Los avances recientes en la vacunación profiláctica frente al VPH y la inminente disponibilidad comercial de estas vacunas, colocan al pediatra ante un nuevo reto: la indicación y administración de estas vacunas para la prevención de la infección por VPH, y como consecuencia, del cáncer de cérvix y otras patologías relacionadas con el VPH. En este artículo se revisan los aspectos esenciales de la infección por VPH, su relación con el cáncer de cérvix, los avances en las vacunas profilácticas frente al VPH y el papel del pediatra en este contexto.Human papillomavirus (HPV) infections are the most common sexually transmitted infections in the world. This infection is a necessary cause of cervical cancer, has been related to other forms of anogenital, airway and digestive cancers, and also causes anogenital warts. The recent advances in HPV prophylactic vaccines and their imminent commercial availability will post a new challenge to pediatricians: the indication and administration of these vaccines for the prevention of HPV infection, and consequently, of cervical cancer and other HPV-related diseases. The present article reviews the essentials of HPV infection, its relationship with cervical cancer, the advances in prophylactic HPV vaccines, and the role of the pediatrician in this context.Medicin

Why are pediatric empyemas on the increase in Spain?

Existe la percepción entre los pediatras españoles de que el número de casos de empiema pediátrico ha aumentado significativamente en los últimos años; sin embargo, la información objetiva disponible es limitada, y además es una patología de libre declaración para la que no existen sistemas específicos de vigilancia epidemiológica activa. En este trabajo se revisa la situación del empiema pediátrico en España, y se discute las principales hipótesis que se han planteado en la bibliografía internacional para explicar este incremento, así como las limitaciones de las fuentes disponibles. Se concluye que, aunque la información disponible es limitada: a) la incidencia de empiema pediátrico está aumentando en nuestro país, tanto globalmente como la específicamente ocasionada por neumococo; b) la causa de este incremento es desconocida, y hasta la fecha no existen datos que permitan vincularlo a la vacuna antineumocócica conjugada heptavalente, y c) esta situación justifica la puesta en marcha de sistemas prospectivos de vigilancia y control del empiema y, una vez más, pone de relieve la importancia de implantar y desarrollar sistemas de vigilancia activa de la enfermedad neumocócica.There is a widespread perception among Spanish pediatricians that the incidence of empyema has significantly increased in the last few years, even though the objective information available is limited, and there is no specific active epidemiological surveillance system for this condition. In the present article, we review the situation of empyema in Spain, and discuss the main hypotheses put forward in the international literature to explain this increase, as well as the limitations of the sources available. Despite the scarcity of information, we draw the following conclusions: 1) the incidence of pediatric empyema is increasing in Spain, both generally and when caused by pneumococcus in particular; 2) the reason for this increase remains unknown, and to date no firm link has been established between this phenomenon and the heptavalent conjugate pneumococcal vaccine; and 3) this situation justifies the establishment of prospective systems for the surveillance and control of empyema and, once again, highlights the importance of developing active surveillance systems for pneumococcal disease.Medicin

Dissociation between blood pressure reduction and fall in proteinuria in primary renal disease: a randomized double-blind trial

OBJECTIVEGuidelines recommend lower threshold and goal blood pressure (BP) for patients with proteinuria. BP reduction could be accompanied by a different fall in proteinuria depending of the antihypertensive drug. The objective was to compare proteinuria reduction when BP is lowered to the same level with different drugs.DESIGNProspective, randomized, double-blind, controlled trial.SETTING12 Spanish centres.PATIENTSA total of 119 patients with primary renal disease, blood pressure > 130/85 mmHg, proteinuria > 1 g/day, and creatinine clearance > or = 50 ml/min.INTERVENTIONAfter a 4-week run-in placebo period, patients were randomized to: atenolol 50 mg/day; trandolapril 2 mg/day; verapamil 240 mg/day or verapamil 180 + trandolapril 2 mg/day combination; forced double-dose titration was carried out at the 4th week. Treatment duration was 6 months.OUTCOME MEASURESChanges in BP, 24 h proteinuria, serum albumin and calcium.RESULTSBP was significantly reduced with the four treatments [SBP/DBP (mmHg]: atenolol 12.2/9.9; trandolapril 12.9/9.3; verapamil 8.2/7.9 and verapamil + trandolapril 13.6/11.3) without differences between them. A significant fall in proteinuria was seen in the trandolapril, 40.2% [95% confidence interval (CI) 24.3-56.2%], and verapamil + trandolapril groups, 48.5% (95% CI, 31.7-64.3%) accompanied with increases in serum albumin (trandolapril: from 3.86 +/- 0.64 to 4.03 +/- 0.67 g/dl; verapamil + trandolapril: from 4.15 +/- 0.58 to 4.40 +/- 0.51 g/dl).CONCLUSIONSIn patients with proteinuric primary renal disease, adequate dose titration of antihypertensive drugs may provide a substantial BP reduction. Only angiotensin-converting enzyme inhibitor (trandolapril) treatment, alone or better combined with verapamil, reduces proteinuria and increases serum albumin