[A quick test of latex agglutination for diagnosing streptococcal pharyngitis and predictive value of the clinical picture].
One hundred and sixty patients with symptoms suggestive of pharyngitis were prospectively studied. The responsible agent in 24% of the cases was streptococcus B haemolyticus group A (EGA) with a clear predominance of female (64%) over male (36%) patients. The greatest number of infections by S. Pyogenes was observed in the age group between 5 and 9 years. No positive cases were found in children less than 3 years old. Utilizing the quick latex agglutination test and comparing the results to those obtained with conventional cultures, a diagnostic fiability of 91% was reached, with 94% specificity, 82% sensibility, 82% PPV, and 94% NPV. These results together with the simplicity and convenience of the technique confirm the usefulness of this diagnostic method. No clinical symptom can be significantly related to streptococcus B haemolyticus pharyngitis. The diagnosis based on the clinical picture has turned out inefficient.
Diz Dios
P
P
Martínez Vázquez
C
C
de Vicente y Alvarez
G
G
Otero Varela
I
I
Rivas Vilas
F
F
Ocampo Hermida
A
A
D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007841:Latex Fixation Tests; D008297:Male; D008875:Middle Aged; D010612:Pharyngitis / Q000175:diagnosis* / Q000209:etiology; D011237:Predictive Value of Tests; D011446:Prospective Studies; D013290:Streptococcal Infections / Q000175:diagnosis*; D013297:Streptococcus pyogenes; D013997:Time Factors
Test rápido de aglutinación de látex para el diagnóstico de faringitis estreptocócica y valor predictivo del cuadro clínico.