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F Solórzano-Santos

Publications and source records attributed to F Solórzano-Santos.

At least 19 recordsLinked to original sources
PubMed2005

Antibacterial effects of commercial essential oils over locally prevalent pathogenic strains in Mexico.

Locally prevalent pathogenic bacteria 189 Gram (-) and 135 Gram (+) strains, all isolated from pediatric patients severely infected, were tested in vitro against 11 essential oils from commercial origin. All the strains showed resistance to selected antibiotics. Cinnamomum verum, Origanum vulgare and Thymus vulgaris exhibited the highest and broadest antibacterial activity. Emphasis is made in the potential implications of these resources, uncommon at the clinical setting of the study, employed against non-commercial, locally pathogenic strains, being a step to submit in the ensuing period essential oils from plants used in Mexican traditional medicine.

Anti-Bacterial Agents↗
PubMed2004

Surveillance of methicillin-resistant Staphylococcus aureus in a pediatric hospital in Mexico City during a 7-year period (1997 to 2003): clonal evolution and impact of infection control.

Between 1997 and 2000 a single multidrug-susceptible methicillin-resistant Staphylococcus aureus clone, M (sequence type 30 [ST30]-staphylococcal cassette chromosome mec [SCCmec] type IV), was present in a pediatric hospital in Mexico City, Mexico. In 2001 the international multidrug-resistant New York-Japan clone (ST5-SCCmec type II) was introduced into the hospital, completely replacing clone M by 2002.

Child↗
PubMed1999

[Nosocomial infections. Experience at a third-level pediatric hospital].

OBJECTIVE: To describe the results of an epidemiologic surveillance program, from 1990 to the first semester of 1997, in a new high-specialty pediatric hospital and perform a comparison with previous reports. MATERIAL AND METHODS: The total number and type of nosocomial infections, the incidence rate and density incidence for department and division, for different age groups and according to immune statues were registered. RESULTS: The global incidence of nosocomial infections during the period was 25.7 per 100 discharges, with a progressive decrease during the last three years. Although immunocompromised patients had more infections than immunocompetent ones, the difference was not significative. The three most common infections were: pneumonia, vascular line infections and upper respiratory tract infections. It is possible that upper respiratory tract infections are contributing to the elevation of global incidence rates of nosocomial infections. CONCLUSIONS: The change of infection epidemiology regarding previous experience has led to the implementation of programs to prevent the most frequent problems. It is necessary to intensify the different prevention programs and to increase their reach in order to cut down costs in a short term.

Adolescent↗
PubMed1998

Predominance of the multiresistant 23F international clone of Streptococcus pneumoniae among isolates from Mexico.

During a surveillance study to determine the relative prevalence of capsular types of Streptococcus pneumoniae and antimicrobial susceptibility of invasive isolates in children <5 years old in Mexico City, 220 isolates were collected. The serotype 23F was the most common found, followed by types 6A + B, 14, 19F, and 19A. Diminished susceptibility to penicillin was detected in 106 isolates (48.2%), and high penicillin resistance was found in 49 strains (22.2%), 31 belonging to type 23F. Resistance was also observed to erythromycin (13.1%), to chloramphenicol (43.1%), and to cefotaxime (10.9%). No strains were resistant to ofloxacin or vancomycin. Forty-four of the highly penicillin resistant isolates (penicillin MIC > or =2.0 microg/ml) were examined with molecular fingerprinting techniques; 29 (65.9%) of these isolates (all except two strains) were serotype 23F and shared subtype variants of PFGE type A characteristic of the internationally spread Spanish/USA clone of S. pneumoniae. These strains were also resistant to trimethoprim/sulfametoxasole (TMP/SMX), chloramphenicol, and tetracycline, and most of them were susceptible to erythromycin. Another 6 of the highly penicillin-resistant strains (serogroups 9 and 14) showed PFGE fingerprints and antimicrobial susceptibility pattern characteristic of a second internationally spread clone (French/Spanish clone) and carried resistance to penicillin and TMP/SMX. The rest of the 9 penicillin-resistant isolates were represented by 7 distinct additional PFGE types. The findings suggest that almost 80% of all highly penicillin resistant strains may have been "imported" into Mexico.

Child, Preschool↗
PubMed1997

Antimicrobial susceptibilities and capsular types of invasive Streptococcus pneumoniae isolated in children in Mexico City.

As part of the Sistema Regional de Vacunas (SIREVA) initiative, we conducted a surveillance study to determine the relative prevalence of capsular types of Streptococcus pneumoniae and antimicrobial susceptibility of invasive isolates in children less than 5 years old. We collected 220 isolates and found 33 of the 90 known types, with type 23F as the most common followed by types 6A+B, 14, 19F, and 19A. High penicillin resistance was found in 49 strains (22.2%), 31 belonging to type 23F. Twenty-nine (13.1%) were resistant to erythromycin, 95 (43.1%) were resistant to chloramphenicol, and 24 (10.9%) were resistant to cefotaxime. No strains were resistant to vancomycin.

Child↗
PubMed1997

Assessment of the functional capacity for intracellular death and phagocytosis of polymorphonuclear cells in healthy neonates.

The objective of this study was to assess the functional capacity for intracellular death (ID) and/or phagocytic index (PI) of polymorphonuclear cells of 24-h-old healthy newborns with respect to the PMN cells of adults using the same standard exogenous source of opsonins. The ID and PI techniques were standardized and 2-3 ml of blood were used. No differences were found in the percentages of ID, P, PI among the PMNs of the newborns and those of the adults: 43.95 +/- 15.70 vs. 44.56 +/- 8.43 for ID; 38.96 +/- 14.34 vs. 39.00 +/- 14.54 for P; 1.71 +/- 0.54 vs. 1.73 0.45 for PI, respectively. It was concluded that the PMNs of 24-h newborns have an ID, P, PI functionality comparable to adult PMNs; differences observed in PMN function in newborns may be due to humoral deficiencies (opsonins).

Adult↗
PubMed1993

[The resistance and serotyping of 83 strains of Streptococcus pneumoniae isolated from asymptomatic carriers and ill children].

Eight-three isolates of Streptococcus pneumoniae obtained from children hospitalized with several infections in Mexico City and Cuernavaca, and from healthy children attending a day-care center in Cuernavaca, from January to September 1992, were screened for antimicrobial resistance patterns by in vitro susceptibility testing against antimicrobial agents of potential use in the treatment of diseases caused by S. pneumoniae (39 infected patients and 44 from healthy children). 21.6% of strains were resistant to penicillin, 52% of the strains were multiresistant without a commun pattern. Children attending a day-care center had a higher rate of S. pneumoniae strains resistant to one or more antimicrobial than hospitalized children. Serotypes or serogroups 6, 23F, 14 and 19 were most prevalent. There are evidence that strain 23F has an intercontinental link, this strain is associated with disseminated diseases and multiresistance to antimicrobials. The results indicate that changes can occur in the susceptibility of S. pneumoniae and that selective susceptibility testing and epidemiologic studies in hospitalized patients and children in day-care centers are necessary.

Anti-Bacterial Agents↗
PubMed1993

[Kala-azar in Mexico: report of 2 cases].

Visceral leishmaniasis is a rare parasitosis in our country; in a 30 year period only exists the report of five cases, three in the state of Puebla and two in the state of Guerrero. Now it has been identified another two cases in the state of Chiapas. In these patients the common presentation of the disease were fever, hepatosplenomegaly, hypergammaglobulinemia and pancytopenia. The parasite can be found in liver, spleen, lymph nodes and bone marrow macrophages. A definitive diagnosis depends on the demonstration of the parasite in tissue; spleen biopsy is the most useful because it is positive in 98% of the cases, in other tissues the amastigotes are seen in 50-80% of the cases. Negative PAS-stained smears maintains the diagnosis until another more specific method as electronic microscopy or culture is available. Pentavalent antimonial compounds are the drugs of choice and as an alternative or in case of failure amphotericin B can be used.

Female↗
PubMed1990

[Streptococcus group B in the etiology of neonatal infection].

Group B Streptococcus (GBS) causes maternal infections during perinatal period and serious neonatal infections. Their frequency in our country is still unknown. This study analyzed the clinical and epidemiological characteristics of 13 neonates inborn at the Instituto Nacional de Perinatología with early or late onset group B streptococcal infection. The incidence of early onset diseases (EOGBS) was 0.7 cases/1,000 live births among 20,054 inborn, and 1 case/20,000 live births of late onset diseases. EOGBS was more common in preterm newborn (median 33.2 w), low birth weight (median 2.025 g) with several maternal risk factors. Lethality rate was 38.5% (5/13). GBS is a recent important pathogen in our institute that must be investigated in another institution of our country. Group B Streptococcus; neonatal septicemia; neonatal pneumonia.

Female↗
PubMed1989

[Neonatal systemic infection caused by Listeria monocytogenes].

Listeria monocytogenes is a gram positive cocco-bacillus which causes perinatal infections and also attacks immunocompromised hosts. Little is known about it in our medium. As part of a prospective study on neonatal systemic infections, its participation at the National Institute of Perinatology was researched. During a period of 18 months, 9,283 live newborns were observed, 141 of them were diagnosed with neonatal septicemia. During this period seven neonates had systemic infections due to Listeria monocytogenes: three had septicemia (two of these with meningitis) and all seven cases had pneumonia. The gestational age of the neonates was 26.1 to 41 weeks (X + DS = 35 + 4.3), with a weight of 830 g to 2,975 g (X + DS 1,958 + 773), four out of seven weighed less than 2,000 grams. The most frequent clinical manifestation was respiratory related causing a need for a differential diagnosis with hyaline membrane disease, transitory tachypnea and meconium swallowing at birth. All of the strains isolated were found to be susceptible to ampicillin, penicillin, gentamicin and amikacin; requiring high CMI levels of cephalosporins.

Humans↗