Carina Rodriguez - Academia.edu (original) (raw)
Papers by Carina Rodriguez
The journal of pediatric pharmacology and therapeutics, May 1, 2019
JAMA Network Open
ImportanceThe COVID-19 pandemic has caused millions of infections and deaths and resulted in unpr... more ImportanceThe COVID-19 pandemic has caused millions of infections and deaths and resulted in unprecedented international public health social and economic crises. As SARS-CoV-2 spread across the globe and its impact became evident, the development of safe and effective vaccines became a priority. Outlining the processes used to establish and support the conduct of the phase 3 randomized clinical trials that led to the rapid emergency use authorization and approval of several COVID-19 vaccines is of major significance for current and future pandemic response efforts.ObservationsTo support the rapid development of vaccines for the US population and the rest of the world, the National Institute of Allergy and Infectious Diseases established the COVID-19 Prevention Network (CoVPN) to assist in the coordination and implementation of phase 3 efficacy trials for COVID-19 vaccine candidates and monoclonal antibodies. By bringing together multiple networks, CoVPN was able to draw on existing...
Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, Jan 12, 2015
Combination antiretroviral therapy (cART) has resulted in a dramatic decrease in human immunodef... more Combination antiretroviral therapy (cART) has resulted in a dramatic decrease in human immunodeficiency virus (HIV)-related opportunistic infections and deaths in US youth, but both continue to occur. We estimated the incidence of complications and deaths in IMPAACT P1074, a long-term US-based prospective multicenter cohort study conducted from April 2008 to June 2014. Incidence rates of selected diagnoses and trends over time were compared with those from a previous observational cohort study, P219C (2004-2007). Causes of death and relevant demographic and clinical features were reviewed. Among 1201 HIV-infected youth in P1074 (87% perinatally infected; mean [standard deviation] age at last chart review, 20.9 [5.4] years), psychiatric and neurodevelopmental disorders, asthma, pneumonia, and genital tract infections were among the most common comorbid conditions. Compared with findings in P219C, conditions with significantly increased incidence included substance or alcohol abuse...
International Journal of Environmental Research and Public Health
The southern region of the United States, often referred to as the Deep South, is disproportionat... more The southern region of the United States, often referred to as the Deep South, is disproportionately affected by HIV. In fact, the highest rates of new HIV infections occur in the Deep South. Approximately one in five new HIV infections are among youth. Youth living with HIV (YLWH) have several behavioral health risks, including co-occurring mental health and substance abuse disorders, which negatively affect medication adherence, contribute to less engagement in HIV care, and result in poor health outcomes. Research suggests that adverse childhood experiences (ACEs) contribute to HIV risk behaviors and that people living with HIV may be more vulnerable to the negative health outcomes and adverse effects of stressors. Using existing program evaluation data, we examined data from 41 YLWH aged 17–24 screened for ACEs in an integrated care setting. Most participants were Black/African American young men who identified as homosexual, bisexual, or questioning, and who acquired HIV behavi...
Journal of Affective Disorders, 2019
Background: Depressive symptoms are well documented among people living with HIV and some evidenc... more Background: Depressive symptoms are well documented among people living with HIV and some evidence suggests that youth living with HIV (YLWH) are more affected than their adult counterparts. Therefore, screening for depression is imperative among YLWH to ensure optimal health. The objective of this study is to compare the utility of the Center for Epidemiological Studies-Depression (CES-D) and the Patient Health Questionnaire (PHQ) as depression screeners in an integrated care setting serving YLWH in the southeastern United States. Methods: As a part of standard care, the CES-D and the PHQ were administered to YLWH. A Retrospective review of patient records was conducted. Using receiver operating characteristic (ROC) curve analysis and reports from mental health providers, researchers compared the utility of the screeners. Results: The sample consisted of 121 cases from 2017. Youth ranged in age from 12-25 (M = 20.68, SD = 2.75). Most were Black/African American (59.5%) males (56.2%) who acquired HIV behaviorally (51.2%). Sexual orientation was nearly evenly split between heterosexual (37.2%) and homosexual (34.7%). The CES-D demonstrated higher specificity and sensitivity for identifying clinical depression, yet, this was not significantly different from the PHQ, p = .09. Limitations: Generalizability of findings may be limited as the study sample included youth from a single integrated care setting. Conclusion: Both the PHQ and the CES-D demonstrate utility for depression screening among YLWH. However, the PHQ may be preferable for use within a clinical setting.
Journal of the International Association of Providers of AIDS Care (JIAPAC), 2021
Young men who have sex with men (YMSM) living with HIV experience challenges with retention in ca... more Young men who have sex with men (YMSM) living with HIV experience challenges with retention in care, which negatively affects viral suppression. To address this, researchers piloted Bijou, a program designed to provide health education through electronically delivered behavior and risk reduction modules. Participants were 29 YMSM aged 19-24 living with HIV from the southeastern US. Participants completed pre, post, and 3-month follow-up (3MFU) surveys assessing knowledge, intervention acceptability, satisfaction, self-efficacy, ehealth literacy, and usability. Findings revealed significant improvement in knowledge and e-health literacy from pre-test to post-test but lost significance at 3MFU. Self-efficacy scores did not show significant differences from pre-test to post-test or 3MFU. Participants who completed all modules considered Bijou usable and acceptable; however, many did not complete the program. Findings suggest a need for adaptations to promote knowledge retention, e-heal...
Prevalence and distribution of adhesins in invasive non-type b encapsulated Haemophilus influenzae
Pneumococcal disease is the most common cause of bacterial pneumonia and is the most prominent in... more Pneumococcal disease is the most common cause of bacterial pneumonia and is the most prominent infection among all serious bacterial infections in children infected with HIV. The World Health Organization (WHO) estimates between 700,000 and 1 million children under 5 years die of pneumococcal disease every year, most commonly in developing countries (1, 2). Children infected with HIV are up to eight times more likely to suffer multiple episodes of invasive pneumococcal disease (IPD), than are children without the infection. IPD is defined by isolation of Streptococcus pneumoniae from a normally sterile site such as blood or cerebrospinal fluid. Bacteremic pneumococcal pneumonia, pneumococcal bacteremia, and meningitis exemplify cases of IPD.
This article cites 42 articles, 22 of which can be accessed free
Journal of Child and Adolescent Psychopharmacology, 2014
Objective: Pediatric acute-onset neuropsychiatric syndrome (PANS) is a subtype of obsessive compu... more Objective: Pediatric acute-onset neuropsychiatric syndrome (PANS) is a subtype of obsessive compulsive disorder (OCD) marked by an abrupt onset or exacerbation of neuropsychiatric symptoms. We aim to characterize the phenotypic presentation of youth with PANS. Methods: Forty-three youth (ages 4-14 years) meeting criteria for PANS were assessed using self-report and clinicianadministered measures, medical record reviews, comprehensive clinical evaluation, and laboratory measures. Results: Youth with PANS presented with an early age of OCD onset (mean = 7.84 years) and exhibited moderate to severe obsessive compulsive symptoms upon evaluation. All had comorbid anxiety and emotional lability, and scored well below normative means on all quality of life subscales. Youth with elevated streptococcal antibody titers trended toward having higher OCD severity, and presented more frequently with dilated pupils relative to youth without elevated titers. A cluster analysis of core PANS symptoms revealed three distinct symptom clusters that included core characteristic PANS symptoms: Streptococcal-related symptoms and cytokine-driven/physiological symptoms. Youth with PANS who had comorbid tics were more likely to exhibit a decline in school performance, visuomotor impairment, food restriction symptoms, and handwriting deterioration, and they reported lower quality of life relative to youth without tics. Conclusions: The sudden, acute onset of neuropsychiatric symptoms, high frequency of comorbidities (i.e., anxiety, behavioral regression, depression, and suicidality), and poor quality of life capture the PANS subgroup as suddenly and severely impaired youth. Identifying clinical characteristics of youth with PANS will allow clinicians to diagnose and treat this subtype of OCD with a more strategized and effective approach.
Journal of Virology, 2006
Secondary bacterial infections often complicate respiratory viral infections, but the mechanisms ... more Secondary bacterial infections often complicate respiratory viral infections, but the mechanisms whereby viruses predispose to bacterial disease are not completely understood. We determined the effects of infection with respiratory syncytial virus (RSV), human parainfluenza virus 3 (HPIV-3), and influenza virus on the abilities of nontypeable Haemophilus influenzae and Streptococcus pneumoniae to adhere to respiratory epithelial cells and how these viruses alter the expression of known receptors for these bacteria. All viruses enhanced bacterial adhesion to primary and immortalized cell lines. RSV and HPIV-3 infection increased the expression of several known receptors for pathogenic bacteria by primary bronchial epithelial cells and A549 cells but not by primary small airway epithelial cells. Influenza virus infection did not alter receptor expression. Paramyxoviruses augmented bacterial adherence to primary bronchial epithelial cells and immortalized cell lines by up-regulating eu...
Journal of Clinical Microbiology, 2002
Invasive infections caused by non-type b encapsulated Haemophilus influenzae have increased in fr... more Invasive infections caused by non-type b encapsulated Haemophilus influenzae have increased in frequency in the last decade. This change prompted us to characterize the genetic relationships of 48 recently isolated invasive H. influenzae type a (Hia), e (Hie), and f (Hif) strains by comparison of restriction digest patterns (RDPs). Recent Hia isolates exhibited moderate genetic diversity, with the majority segregating into two major clonotypes. Recent Hie and, especially, Hif strains displayed considerably restricted genetic diversity. In particular, all but one Hif strain segregated into a single clonotype, and half of these isolates had identical RDPs. These results are consistent with the hypothesis that the increased incidence of disease due to non-type b encapsulated H. influenzae reflects the emergence of hypervirulent clones, especially in the case of Hif. Alternatively, it is possible that non-type b encapsulated H. influenzae strains have limited overall genetic diversity.
Journal of Clinical Microbiology, 2003
Study of the epidemiology of invasive infections caused by encapsulated Haemophilus influenzae ha... more Study of the epidemiology of invasive infections caused by encapsulated Haemophilus influenzae has been complicated by the poor sensitivity and specificity of the serologic assays used to identify specific capsular polysaccharides. The population structure of these bacteria is highly clonal, however, and serotype is highly correlated with other genetic characteristics. We sought to determine if alleles of the highly conserved phosphoglucose isomerase ( pgi ) gene correspond to the serotypes of encapsulated H. influenzae strains. pgi alleles of 52 well-characterized encapsulated H. influenzae isolates were amplified by PCR, sequenced, and compared to one another and to additional previously reported H. influenzae pgi alleles. Overall, 83% of the strains possessed pgi alleles associated with the major serotype a, b, e, and f clonotypes that cause the most invasive disease in the United States. Six strains (four type a and two type f) had unusual pgi alleles, which suggested that these...
Infection and Immunity, 2006
Nontypeable Haemophilus influenzae (NTHI) is an important respiratory pathogen. NTHI initiates in... more Nontypeable Haemophilus influenzae (NTHI) is an important respiratory pathogen. NTHI initiates infection by adhering to the airway epithelium. Here, we report that NTHI interacts with intracellular adhesion molecule 1 (ICAM-1) expressed by respiratory epithelial cells. A fourfold-higher number of NTHI bacteria adhered to Chinese hamster ovary (CHO) cells transfected with human ICAM-1 (CHO-ICAM-1) than to control CHO cells (P ≤ 0.005). Blocking cell surface ICAM-1 with specific antibody reduced the adhesion of NTHI to A549 respiratory epithelial cells by 37% (P = 0.001) and to CHO-ICAM-1 cells by 69% (P = 0.005). Preincubating the bacteria with recombinant ICAM-1 reduced adhesion by 69% (P = 0.003). The adherence to CHO-ICAM-1 cells of NTHI strains deficient in the adhesins P5, P2, HMW1/2, and Hap or expressing a truncated lipooligosaccharide was compared to that of parental strains. Only strain 1128f−, which lacks the outer membrane protein (OMP) P5-homologous adhesin (P5 fimbriae),...
Infection and Immunity, 2003
Adhesion to the respiratory epithelium plays an important role in Haemophilus influenzae infectio... more Adhesion to the respiratory epithelium plays an important role in Haemophilus influenzae infection. The distribution of H. influenzae adhesins in type b and nontypeable strains has been characterized, but little is known about the prevalence of these factors in non-type b encapsulated strains. We analyzed 53 invasive type a, type e, and type f strains for the presence of hap , hia , hmw , and hif genes; Hap, Hia, and HMW1/2 adhesins; and hemagglutinating pili. The hap gene was ubiquitous, and homologs of hmw and hia were present in 7 of 53 (13.2%) and 45 of 53 (84.9%) strains, respectively. Hap was detected in 28 of 45 (62.2%) hap + strains, HMW1/2 was detected in 5 of 7 (71.4%) hmw + strains, and Hia was detected in 31 of 45 (68.8%) hia + strains. The hif gene cluster was present in 26 of 53 strains (49.1%), and 21 of 26 hif + strains (80.8%) agglutinated (HA) red blood cells. Nine isolates exhibited HA but lacked the hif gene cluster. The distribution of adhesin genes correlated w...
Fetal & Pediatric Pathology, 2006
Advances in laboratory methods have driven improvements in the management and treatment of HIV in... more Advances in laboratory methods have driven improvements in the management and treatment of HIV infection. The methods to accurately and rapidly diagnose HIV infection in infants and children have been outlined in the previous article. In this review, the laboratory evaluation of infected children is described and methods to monitor progression of disease and response to therapy outlined.
The journal of pediatric pharmacology and therapeutics, May 1, 2019
JAMA Network Open
ImportanceThe COVID-19 pandemic has caused millions of infections and deaths and resulted in unpr... more ImportanceThe COVID-19 pandemic has caused millions of infections and deaths and resulted in unprecedented international public health social and economic crises. As SARS-CoV-2 spread across the globe and its impact became evident, the development of safe and effective vaccines became a priority. Outlining the processes used to establish and support the conduct of the phase 3 randomized clinical trials that led to the rapid emergency use authorization and approval of several COVID-19 vaccines is of major significance for current and future pandemic response efforts.ObservationsTo support the rapid development of vaccines for the US population and the rest of the world, the National Institute of Allergy and Infectious Diseases established the COVID-19 Prevention Network (CoVPN) to assist in the coordination and implementation of phase 3 efficacy trials for COVID-19 vaccine candidates and monoclonal antibodies. By bringing together multiple networks, CoVPN was able to draw on existing...
Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, Jan 12, 2015
Combination antiretroviral therapy (cART) has resulted in a dramatic decrease in human immunodef... more Combination antiretroviral therapy (cART) has resulted in a dramatic decrease in human immunodeficiency virus (HIV)-related opportunistic infections and deaths in US youth, but both continue to occur. We estimated the incidence of complications and deaths in IMPAACT P1074, a long-term US-based prospective multicenter cohort study conducted from April 2008 to June 2014. Incidence rates of selected diagnoses and trends over time were compared with those from a previous observational cohort study, P219C (2004-2007). Causes of death and relevant demographic and clinical features were reviewed. Among 1201 HIV-infected youth in P1074 (87% perinatally infected; mean [standard deviation] age at last chart review, 20.9 [5.4] years), psychiatric and neurodevelopmental disorders, asthma, pneumonia, and genital tract infections were among the most common comorbid conditions. Compared with findings in P219C, conditions with significantly increased incidence included substance or alcohol abuse...
International Journal of Environmental Research and Public Health
The southern region of the United States, often referred to as the Deep South, is disproportionat... more The southern region of the United States, often referred to as the Deep South, is disproportionately affected by HIV. In fact, the highest rates of new HIV infections occur in the Deep South. Approximately one in five new HIV infections are among youth. Youth living with HIV (YLWH) have several behavioral health risks, including co-occurring mental health and substance abuse disorders, which negatively affect medication adherence, contribute to less engagement in HIV care, and result in poor health outcomes. Research suggests that adverse childhood experiences (ACEs) contribute to HIV risk behaviors and that people living with HIV may be more vulnerable to the negative health outcomes and adverse effects of stressors. Using existing program evaluation data, we examined data from 41 YLWH aged 17–24 screened for ACEs in an integrated care setting. Most participants were Black/African American young men who identified as homosexual, bisexual, or questioning, and who acquired HIV behavi...
Journal of Affective Disorders, 2019
Background: Depressive symptoms are well documented among people living with HIV and some evidenc... more Background: Depressive symptoms are well documented among people living with HIV and some evidence suggests that youth living with HIV (YLWH) are more affected than their adult counterparts. Therefore, screening for depression is imperative among YLWH to ensure optimal health. The objective of this study is to compare the utility of the Center for Epidemiological Studies-Depression (CES-D) and the Patient Health Questionnaire (PHQ) as depression screeners in an integrated care setting serving YLWH in the southeastern United States. Methods: As a part of standard care, the CES-D and the PHQ were administered to YLWH. A Retrospective review of patient records was conducted. Using receiver operating characteristic (ROC) curve analysis and reports from mental health providers, researchers compared the utility of the screeners. Results: The sample consisted of 121 cases from 2017. Youth ranged in age from 12-25 (M = 20.68, SD = 2.75). Most were Black/African American (59.5%) males (56.2%) who acquired HIV behaviorally (51.2%). Sexual orientation was nearly evenly split between heterosexual (37.2%) and homosexual (34.7%). The CES-D demonstrated higher specificity and sensitivity for identifying clinical depression, yet, this was not significantly different from the PHQ, p = .09. Limitations: Generalizability of findings may be limited as the study sample included youth from a single integrated care setting. Conclusion: Both the PHQ and the CES-D demonstrate utility for depression screening among YLWH. However, the PHQ may be preferable for use within a clinical setting.
Journal of the International Association of Providers of AIDS Care (JIAPAC), 2021
Young men who have sex with men (YMSM) living with HIV experience challenges with retention in ca... more Young men who have sex with men (YMSM) living with HIV experience challenges with retention in care, which negatively affects viral suppression. To address this, researchers piloted Bijou, a program designed to provide health education through electronically delivered behavior and risk reduction modules. Participants were 29 YMSM aged 19-24 living with HIV from the southeastern US. Participants completed pre, post, and 3-month follow-up (3MFU) surveys assessing knowledge, intervention acceptability, satisfaction, self-efficacy, ehealth literacy, and usability. Findings revealed significant improvement in knowledge and e-health literacy from pre-test to post-test but lost significance at 3MFU. Self-efficacy scores did not show significant differences from pre-test to post-test or 3MFU. Participants who completed all modules considered Bijou usable and acceptable; however, many did not complete the program. Findings suggest a need for adaptations to promote knowledge retention, e-heal...
Prevalence and distribution of adhesins in invasive non-type b encapsulated Haemophilus influenzae
Pneumococcal disease is the most common cause of bacterial pneumonia and is the most prominent in... more Pneumococcal disease is the most common cause of bacterial pneumonia and is the most prominent infection among all serious bacterial infections in children infected with HIV. The World Health Organization (WHO) estimates between 700,000 and 1 million children under 5 years die of pneumococcal disease every year, most commonly in developing countries (1, 2). Children infected with HIV are up to eight times more likely to suffer multiple episodes of invasive pneumococcal disease (IPD), than are children without the infection. IPD is defined by isolation of Streptococcus pneumoniae from a normally sterile site such as blood or cerebrospinal fluid. Bacteremic pneumococcal pneumonia, pneumococcal bacteremia, and meningitis exemplify cases of IPD.
This article cites 42 articles, 22 of which can be accessed free
Journal of Child and Adolescent Psychopharmacology, 2014
Objective: Pediatric acute-onset neuropsychiatric syndrome (PANS) is a subtype of obsessive compu... more Objective: Pediatric acute-onset neuropsychiatric syndrome (PANS) is a subtype of obsessive compulsive disorder (OCD) marked by an abrupt onset or exacerbation of neuropsychiatric symptoms. We aim to characterize the phenotypic presentation of youth with PANS. Methods: Forty-three youth (ages 4-14 years) meeting criteria for PANS were assessed using self-report and clinicianadministered measures, medical record reviews, comprehensive clinical evaluation, and laboratory measures. Results: Youth with PANS presented with an early age of OCD onset (mean = 7.84 years) and exhibited moderate to severe obsessive compulsive symptoms upon evaluation. All had comorbid anxiety and emotional lability, and scored well below normative means on all quality of life subscales. Youth with elevated streptococcal antibody titers trended toward having higher OCD severity, and presented more frequently with dilated pupils relative to youth without elevated titers. A cluster analysis of core PANS symptoms revealed three distinct symptom clusters that included core characteristic PANS symptoms: Streptococcal-related symptoms and cytokine-driven/physiological symptoms. Youth with PANS who had comorbid tics were more likely to exhibit a decline in school performance, visuomotor impairment, food restriction symptoms, and handwriting deterioration, and they reported lower quality of life relative to youth without tics. Conclusions: The sudden, acute onset of neuropsychiatric symptoms, high frequency of comorbidities (i.e., anxiety, behavioral regression, depression, and suicidality), and poor quality of life capture the PANS subgroup as suddenly and severely impaired youth. Identifying clinical characteristics of youth with PANS will allow clinicians to diagnose and treat this subtype of OCD with a more strategized and effective approach.
Journal of Virology, 2006
Secondary bacterial infections often complicate respiratory viral infections, but the mechanisms ... more Secondary bacterial infections often complicate respiratory viral infections, but the mechanisms whereby viruses predispose to bacterial disease are not completely understood. We determined the effects of infection with respiratory syncytial virus (RSV), human parainfluenza virus 3 (HPIV-3), and influenza virus on the abilities of nontypeable Haemophilus influenzae and Streptococcus pneumoniae to adhere to respiratory epithelial cells and how these viruses alter the expression of known receptors for these bacteria. All viruses enhanced bacterial adhesion to primary and immortalized cell lines. RSV and HPIV-3 infection increased the expression of several known receptors for pathogenic bacteria by primary bronchial epithelial cells and A549 cells but not by primary small airway epithelial cells. Influenza virus infection did not alter receptor expression. Paramyxoviruses augmented bacterial adherence to primary bronchial epithelial cells and immortalized cell lines by up-regulating eu...
Journal of Clinical Microbiology, 2002
Invasive infections caused by non-type b encapsulated Haemophilus influenzae have increased in fr... more Invasive infections caused by non-type b encapsulated Haemophilus influenzae have increased in frequency in the last decade. This change prompted us to characterize the genetic relationships of 48 recently isolated invasive H. influenzae type a (Hia), e (Hie), and f (Hif) strains by comparison of restriction digest patterns (RDPs). Recent Hia isolates exhibited moderate genetic diversity, with the majority segregating into two major clonotypes. Recent Hie and, especially, Hif strains displayed considerably restricted genetic diversity. In particular, all but one Hif strain segregated into a single clonotype, and half of these isolates had identical RDPs. These results are consistent with the hypothesis that the increased incidence of disease due to non-type b encapsulated H. influenzae reflects the emergence of hypervirulent clones, especially in the case of Hif. Alternatively, it is possible that non-type b encapsulated H. influenzae strains have limited overall genetic diversity.
Journal of Clinical Microbiology, 2003
Study of the epidemiology of invasive infections caused by encapsulated Haemophilus influenzae ha... more Study of the epidemiology of invasive infections caused by encapsulated Haemophilus influenzae has been complicated by the poor sensitivity and specificity of the serologic assays used to identify specific capsular polysaccharides. The population structure of these bacteria is highly clonal, however, and serotype is highly correlated with other genetic characteristics. We sought to determine if alleles of the highly conserved phosphoglucose isomerase ( pgi ) gene correspond to the serotypes of encapsulated H. influenzae strains. pgi alleles of 52 well-characterized encapsulated H. influenzae isolates were amplified by PCR, sequenced, and compared to one another and to additional previously reported H. influenzae pgi alleles. Overall, 83% of the strains possessed pgi alleles associated with the major serotype a, b, e, and f clonotypes that cause the most invasive disease in the United States. Six strains (four type a and two type f) had unusual pgi alleles, which suggested that these...
Infection and Immunity, 2006
Nontypeable Haemophilus influenzae (NTHI) is an important respiratory pathogen. NTHI initiates in... more Nontypeable Haemophilus influenzae (NTHI) is an important respiratory pathogen. NTHI initiates infection by adhering to the airway epithelium. Here, we report that NTHI interacts with intracellular adhesion molecule 1 (ICAM-1) expressed by respiratory epithelial cells. A fourfold-higher number of NTHI bacteria adhered to Chinese hamster ovary (CHO) cells transfected with human ICAM-1 (CHO-ICAM-1) than to control CHO cells (P ≤ 0.005). Blocking cell surface ICAM-1 with specific antibody reduced the adhesion of NTHI to A549 respiratory epithelial cells by 37% (P = 0.001) and to CHO-ICAM-1 cells by 69% (P = 0.005). Preincubating the bacteria with recombinant ICAM-1 reduced adhesion by 69% (P = 0.003). The adherence to CHO-ICAM-1 cells of NTHI strains deficient in the adhesins P5, P2, HMW1/2, and Hap or expressing a truncated lipooligosaccharide was compared to that of parental strains. Only strain 1128f−, which lacks the outer membrane protein (OMP) P5-homologous adhesin (P5 fimbriae),...
Infection and Immunity, 2003
Adhesion to the respiratory epithelium plays an important role in Haemophilus influenzae infectio... more Adhesion to the respiratory epithelium plays an important role in Haemophilus influenzae infection. The distribution of H. influenzae adhesins in type b and nontypeable strains has been characterized, but little is known about the prevalence of these factors in non-type b encapsulated strains. We analyzed 53 invasive type a, type e, and type f strains for the presence of hap , hia , hmw , and hif genes; Hap, Hia, and HMW1/2 adhesins; and hemagglutinating pili. The hap gene was ubiquitous, and homologs of hmw and hia were present in 7 of 53 (13.2%) and 45 of 53 (84.9%) strains, respectively. Hap was detected in 28 of 45 (62.2%) hap + strains, HMW1/2 was detected in 5 of 7 (71.4%) hmw + strains, and Hia was detected in 31 of 45 (68.8%) hia + strains. The hif gene cluster was present in 26 of 53 strains (49.1%), and 21 of 26 hif + strains (80.8%) agglutinated (HA) red blood cells. Nine isolates exhibited HA but lacked the hif gene cluster. The distribution of adhesin genes correlated w...
Fetal & Pediatric Pathology, 2006
Advances in laboratory methods have driven improvements in the management and treatment of HIV in... more Advances in laboratory methods have driven improvements in the management and treatment of HIV infection. The methods to accurately and rapidly diagnose HIV infection in infants and children have been outlined in the previous article. In this review, the laboratory evaluation of infected children is described and methods to monitor progression of disease and response to therapy outlined.