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June 1963

V. An Analysis and Interpretation

Author Affiliations

Recipient of Lederle Faculty Award (Dr. Shinefield), Assistant Professor of Medicine (Dr. Ribble) and Professor of Pediatrics (Dr. Eichenwald), Cornell University Medical College; Epidemic Intelligence Service Officer, CDC PHS USDHEW, Instructor, Departments of Preventive Medicine and Pediatrics, Emory University, School of Medicine, Atlanta, Ga (Dr. Boris); Associate Professor of Pediatrics, University of Cincinnati College of Medicine (Dr. Sutherland).; Henry R. Shinefield, MD, Assistant Professor of Pediatrics, The New York Hospital-Cornell Medical Center, 525 E 68th St, New York.; From the Department of Pediatrics, The New York Hospital-Cornell Medical Center; Department of Pediatrics, College of Medicine-University of Cincinnati, Cincinnati General Hospital.

Am J Dis Child. 1963;105(6):683-688. doi:10.1001/archpedi.1963.02080040685019

In the preceding four papers of this series, we have presented evidence from four different hospital newborn services, which substantiates several hypotheses: (1) the presence of one particular strain of Staphylococcus aureus may interfere with the subsequent acquisition of another staphylococcal strain; (2) this phenomenon can be utilized to protect an infant against infection and disease caused by the so-called epidemic phage types; and (3) certain staphylococcal types are more pathogenic to infants than others.1-4

These studies were carried out in hospitals which cared for different population groups and engaged in a variety of nursery practices. The epidemiology of infectious disease in general is complex and perhaps even undefinable when several mutually independent factors operate simultaneously. It is thus

Table 1.—Protective Effect of Strain 502A on Subsequent Nasal Colonization With Other Types of Staphylococcus Aureus: Summary of Data from Three

Colonization with 80/81 or Staphylococci Other Than 502A

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