1. Editorial note

   • Carlo Chezzi

   EditorialNotes Pages: iii - iii

2. Incidence of gestational trophoblastic disease in Stockholm County, 1975–1988

   • F. Flam
   • V. Lundstrom-Lindstedt
   • L. E. Rutqvist

   OriginalPaper Pages: 173 - 177

3. The Alsatian tick-borne encephalitis focus: Presence of the virus among ticks and small mammals

   • C. Perez-Eid
   • C. Hannoun
   • F. Rodhain

   OriginalPaper Pages: 178 - 186

4. A theoretical problem of interpreting the recently reported increase in homosexual gonorrhoea

   • L. Whitaker
   • A. M. Renton

   OriginalPaper Pages: 187 - 191

5. Mediterranean spotted fever in Marseille: Descriptive epidemiology and the influence of climatic factors

   • D. Raoult
   • H. Tissot Dupont
   • C. Charrel

   OriginalPaper Pages: 192 - 197

6. Molecular cloning and characterization of DNA from human intestinal spirochetes

   • G. Dettori
   • R. Burioni
   • P. Cattani

   OriginalPaper Pages: 198 - 205

7. Histoplasmosis in northwestern Argentina. Epidemiological survey of Chuscha and La Higuera in the province of Tucumán

   • A. Van Gelderen de Komaid
   • E. L. Duŕan
   • V. Carizo

   OriginalPaper Pages: 206 - 210

8. Antibody response to inactivated polio vaccine (E-IPV) in children born to HIV positive mothers

   • M. Barbi
   • M. Bardare
   • G. Ferraris

   OriginalPaper Pages: 211 - 216

9. Absence of antibodies to human herpesvirus-6 in patients with slowly-progressive human immunodeficiency virus type I infection

   • H. Chen
   • A. M. Pesce
   • M. Fiorilli

   OriginalPaper Pages: 217 - 221

10. Identification of homogeneous geographical areas of mortality for tumours from cluster analysis

    • A. Tampieri
    • P. L. Tartoni
    • M. Manicardi

    OriginalPaper Pages: 222 - 227

11. Occupational hazard of unnoticed leptospirosis in water ways maintenance staff

    • G. Andre-Fontaine
    • X. Peslerbe
    • J. P. Ganiere

    OriginalPaper Pages: 228 - 232

12. Study of the relation between diet and gastric cancer in a rural area of the province of Leon, Spain

    • A. Sanchez-diez
    • R. Hernandez-mejia
    • A. Cueto-espinar

    OriginalPaper Pages: 233 - 237

13. Epidemiological survey of Streptococcus mutans in a group of adult patients living in Pisa (Italy)

    • G. Batoni
    • F. Ota
    • M. Campa

    OriginalPaper Pages: 238 - 242

14. Compliance of austrian tourists with prophylactic measures

    • H. Kollaritsch
    • G. Wiedermann

    OriginalPaper Pages: 243 - 251

15. Seasonal variation in gonorrhoea

    • J. D. C. Ross
    • G. R. Scott

    OriginalPaper Pages: 252 - 255

16. An international case-control study on hypospadias the problem with variability and the beauty of diversity

    • B. källén
    • E. E. Castilla
    • P. Mastroiacovo

    OriginalPaper Pages: 256 - 263

17. Sustained aids education campaigns and behavioural changes in Italian drug abusers

    • F. Bortolotti
    • A. Stivanello
    • A. Bertolini

    OriginalPaper Pages: 264 - 267

18. Clinicoepidemiological study of murine typhus on the Greek island of Evia

    • Y. Tselentis
    • T. L. Babalis
    • D. Raoult

    OriginalPaper Pages: 268 - 272

19. Canine leishmaniasis in the Gargano promontory (Apulia, South Italy)

    • O. Brandonisio
    • G. Carelli
    • V. Puccini

    OriginalPaper Pages: 273 - 276

20. Inguinal hernia and certain risk factors

    • J. Flich
    • J. L. Alfonso
    • P. Cortina

    OriginalPaper Pages: 277 - 282

21. Report on an outbreak of trichinellosis in Central Italy

    • R. F. Frongillo
    • B. Baldelli
    • F. Di Leonardo

    OriginalPaper Pages: 283 - 288

22. Evolution of hepatitis a antibodies prevalence in young French military recruits

    • M. Joussemet
    • Ph. Bourin
    • R. Deloince

    OriginalPaper Pages: 289 - 291

23. An outbreak of group a food-borne streptococcal pharyngitis

    • G. Gallo
    • R. Berzero
    • G. Orefici

    OriginalPaper Pages: 292 - 297

24. Detection of antibodies to human immunodeficiency virus type I by using synthetic peptides and time-resolved fluoroimmunoassay (TR-FIA)

    • R. M. Lombardi
    • O. Libonatti
    • P. Rossi

    OriginalPaper Pages: 298 - 304

25. Hansenula anomala fungemia in an infant with gastric and cardiac complications with a review of the literature

    • A. S. Sekhon
    • K. Kowalewska-Grochowska
    • W. Vaudry

    Brief Reports Pages: 305 - 308

26. Prevalence of anti-HCV in subjects of various age groups

    • A. Albano
    • A. Pianetti
    • A. Salvaggio

    Brief Reports Pages: 309 - 311

27. On superior scientists and inferior scientific communities

    • Z. Radovanovic

    Letter to the Editor Pages: 312 - 313

28. Increased use of public and private drug services after aids in Italy. Implications for the control of HIV spread

    • D. Serraino

    Letter to the Editor Pages: 314 - 316

29. Chronobiology of traffic accidents in Italy

    • P. Pasqualetti
    • R. Casale

    Letter to the Editor Pages: 317 - 318