ABSTRACT
Streptococcus gallolyticus subsp. pasteurianus is known to cause bacterial meningitis in adults, and most of the few pediatric cases observed occurred in neonates. We report the case of a 9-month old boy with a history of repeated hospitalizations due to respiratory diseases, who presented meningitis and bacteremia by Streptococcus gallolyticus subsp. pasterianus. To our knowledge, this is the first reported case in Santa Fe to this date.
Subject(s)
Cerebrospinal Fluid/microbiology , Streptococcus/isolation & purification , Humans , Infant , Male , Meningitis, Bacterial/microbiology , Streptococcus/classificationABSTRACT
The bacterial isolates from respiratory samples of 50 pediatric patients with cystic fibrosis, their distribution by ages and antimicrobial resistance pattern as well as the intermittence of isolations and coinfections, were investigated. Staphylococcus aureus was isolated in 72
of patients, followed by Pseudomonas aeruginosa (58
), and the Burkholderia cepacia complex (12
). The frequency of resistance of P. aeruginosa isolates to ß-lactam antibiotics was low (13.8
). Fifty percent of S. aureus isolates was methicillin-resistant, and 57.1
of H. influenza was ampicillin resistant due to ß-lactamase production. In children under 4 years-old, S. aureus was predominant, followed by P. aeruginosa and H. influenzae. This order of predominance was observed in all the groups studied, except in that of children between 10 and 14 years-old. Stenotrophomonas maltophilia and Achromobacter xylosoxidans isolates were intermittent and accompanied by other microorganisms. Finally, we observed a great variety of bacterial species, which imposes stringent performance requirements for microbiological studies in all respiratory samples of these patients.
Subject(s)
Gram-Negative Bacteria/isolation & purification , Cystic Fibrosis/complications , Respiratory Tract Infections/microbiology , Respiratory System/microbiology , Staphylococcus aureus/isolation & purification , Adolescent , Gram-Negative Bacteria/drug effects , Coinfection/epidemiology , Coinfection/microbiology , Child , Sputum/microbiology , Species Specificity , Retrospective Studies , Pharynx/microbiology , Drug Resistance, Multiple, Bacterial , Age Factors , Female , Cystic Fibrosis/microbiology , Humans , Staphylococcal Infections/epidemiology , Staphylococcal Infections/etiology , Staphylococcal Infections/microbiology , Respiratory Tract Infections/epidemiology , Respiratory Tract Infections/etiology , Gram-Negative Bacterial Infections/epidemiology , Gram-Negative Bacterial Infections/etiology , Gram-Negative Bacterial Infections/microbiology , Infant , Male , Nasopharynx/microbiology , Child, PreschoolABSTRACT
Existen dos amebas, morfológicamente idénticas, cuyas diferencias determinanque una de ellas, Entamoeba histolytica, pueda ser patógena. La otra, Entamoeba dispar, es inocua.Surgió la presunción de que casos tratados como amebiasis, no lo fueran. Objetivo. Identificar E. histolytica en niños con disenterías supuestamente amebianas. Métodos. Estudio transversal y observacional realizado en Santa Fe, entre marzo de 2005 y noviembre de 2007. En niños de 2 meses a 15 años con disentería y exámenes directos con E. histolytica/dispar, se realizó ELISA para detectar la adhesina de E. histolytica (adhesina Eh) en heces.Se efectuaron coloraciones para amebas, coprocultivos y se registraron datos clínicos.Resultados. De 75 casos estudiados, 35 fueron varones y 40 mujeres, con edad (mediana) de 3 años. Todos presentaron diarreas agudas con leucocitos;73 por ciento en sangre visible microcópicamente y 27 por ciento en el estudio microscópico. Tuvieron adhesina Eh positiva, 21. En 3 de ellos se detectaron trofozoítos hematófagos.Se realizaron 15 coprocultivos, en 5 desarrolló S. flexneri de tipo S2. Otros parásitos: 6 (Blastocystis homini 5).Tuvieron adhesina Eh negativa, 54. El 19 por ciento de las coloraciones demostró E. dispar.A 44 se les realizaron coprocultivos; desarrollaron bacterias invasivas 12 casos: S. flexneri de tipo S2 (13), Shigella sp (1), C. jejuni (5), otros (3). Otros parásitos: 12 (Blastocystis hominis 9).Conclusión. En este grupo de niños con disenterías amebianas, en la mitad de los casos seidentificaron bacterias invasivas y sólo en el 28 por ciento se detectó E. histolytica en heces, con lo cual cabría esperar una prevalencia de 18-38 por ciento de casos positivos en la población [IC 95 por ciento (0,179; 0,381)].