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R R Cuadrado

Publications and source records attributed to R R Cuadrado.

13 recordsLinked to original sources
PubMed1970

Antibodies of influenza viruses in military recruits from Argentina, Brazil and Colombia. Their relation to ABO blood group distribution.

In a large-scale seroepidemiological study, the prevalence was determined of antibodies to influenza A viruses in the sera of military representative of the inhabited geographical regions of Argentina, Brazil and Colombia. The micro-haemagglutination-inhibition test was used against the Swine, PR/8, FM/1 and Asian antigenic strains. From each of the three recruit populations 500 sera were tested.Positive titres to the FM/1 and Asian strains were found in 72% and 80% respectively of the Colombian sera, in 56% and 69% of the Argentinian sera, and in 49% and 63% of the Brazilian sera. Of these 1500 sera, 5 were positive to the PR/8 strain and 2 to the Swine strain.This study also showed that there were highly significantly greater proportions of positive reactors to the FM/1 and Asian strains among persons of blood groups O and B than among those of blood group A in all three countries.

ABO Blood-Group System↗
PubMed1965

An epidemiological study on parainfluenza, DA and mumps virus infections in domestic animals in New England.

Recent studies have shown high levels of antibody to the parainfluenza virus group in human sera collected in New England and in other populations in various parts of the world. In view of the importance of animals as reservoirs of viruses affecting man, studies were carried out to assess the level of immunity to the parainfluenza, DA and mumps viruses in domestic animals (cows, swine, dogs, cats, lambs, and sheep) in New England.Antibody levels were determined by the haemagglutination-inhibition test. The results indicated that parainfluenza 3 was the most prevalent followed by parainfluenza 2 and parainfluenza 1; high levels were also found for DA and mumps viruses.A modified agar-gel diffusion test for detecting mumps precipitating antibodies was also investigated. Mumps-immune sera showed a reaction against concentrated soluble antigen. A comparison of the agar-gel diffusion method and standard serological methods, including complement-fixation, neutralization and haemagglutination-inhibition, indicated a significant correlation between the various techniques.

Animal Diseases↗