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Query: UMLS:C0348321 (Haemophilus)
 15,372 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Serious invasive bacterial infections, particularly those due to Streptococcus pneumoniae and Hemophilus influenzae, are a well-known complication in patients with sickle cell disease. Early penicillin prophylaxis has been shown to prevent these infections and also to improve survival. This article describes a child with sickle cell anemia who, while on penicillin prophylaxis, developed a group A streptococcal bacteremia, a pathogen not commonly associated with bacteremia in sickle cell disease.
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PMID:Group A beta-hemolytic streptococcal bacteremia in a patient with sickle cell anemia on penicillin prophylaxis. 778 41

Two hundred forty-one children who had osteomyelitis during a 19-year period, 1974 through 1992, were identified by chart review. Acute osteomyelitis or chronic osteomyelitis was the diagnosis for 221 (92%) and 20 (8%) of the children, respectively. Bacteriologic etiology was documented in 137 (57%) of the cases. Staphylococcus aureus, Pseudomonas aeruginosa, Salmonella species organisms, and Haemophilus influenzae type b were isolated from 97 (40%), 10 (4%), 8 (3%), and 7 (3%) of the children, respectively. S. aureus was the predominant microorganism in all age groups, whereas H. influenzae occurred only in children younger than 2 years of age. P. aeruginosa was recovered predominantly from children with a penetrating injury of the foot, while salmonella bone infections were diagnosed in patients with sickle cell disease. These data provide guidelines for the initial work-up for and management of osteomyelitis in children living in developing Latin American countries.
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PMID:Pediatric osteomyelitis in Panama. 798 7

These clinical practice guidelines set forth a comprehensive program for identifying, diagnosing, and treating newborns and infants with sickle cell disease and recommend education and counseling strategies for their parents. Sickle cell disease comprises a group of genetic disorders characterized by the production of hemoglobin S, anemia, and acute and chronic tissue damage secondary to the blockage of blood flow by abnormally shaped red cells. Sickle cell anemia is the most common form of the disease, and it affects approximately 1 in 375 African-American infants. Although in the United States sickle cell disease is most commonly found in persons of African ancestry, it also affects other populations. The panel recommends screening of all newborns for sickle cell disease, since targeting specific groups will miss some infected infants. Samples of dried blood on filter paper or liquid blood samples should be used for hemoglobinopathy screening. Hemoglobin electrophoresis, isoelectric focusing, and high performance liquid chromatography are acceptable, reliable, and accurate testing methods. Infants identified on initial screening must be retested to establish a definitive diagnosis. Affected infants must be given twice-daily oral penicillin beginning at 2 months of age to reduce pneumococcal, conjugated Haemophilus influenzae, and hepatitis B vaccines. Infants with sickle cell disease require the same well-child care as infants without the disease. Education and nondirective genetic counseling should be offered to all parents of infants with sickle cell disease. The guidelines stress the need for a comprehensive and fully integrated approach to reduce morbidity and mortality from sickle cell disease.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Update: new guidelines for the treatment of infants with sickle cell disease. Agency for Health Care Policy and Research. 827 35

In order to determine the prevalence and pattern of bacterial infections in children with sickle cell disease (SCD) admitted with acute illness, a prospective study of 304 sicklers aged 3 months to 15 years was carried out over 1 year in the emergency pediatric unit of ABU Teaching Hospital Kaduma. Initial blood and urine cultures were obtained in all cases and other cultures were performed as determined by the patients' clinical condition. Almost 60 per cent of the patients had positive bacterial cultures with gram negative organisms accounting for 55 per cent of them, but the single most predominant organism isolated was Staphylococcus aureus. Of note was the strikingly low isolation rate of Streptococcus pneumoniae, Haemophilus influenzae and Neisseria meningitides. Possible reasons for this difference from the majority of reports from the western World are advanced and the implications discussed, especially as regards vaccination programmes in sickle cell disease and initial antibiotic treatment of those with acute illness.
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PMID:Variation in the pattern of bacterial infection in patients with sickle cell disease requiring admission. 900 54

Our objectives were to determine aetiology and localisation of infection in sickle cell anaemia patients. The origin of fever was malaria in 47% of cases, 50% of bacterial infections and 3% of viral infections. Respiratory infections were concerned in 61% of cases, versus 24% of osteomyelitis. Salmonella were found in 37%, Haemophilus (16%), Staphylococcus (14%), Streptococcus (10%) and Pneumococcus (9%). We found more bacterial infection in anaemic forms (SS and SFA2) and more bacterial infection anemic forms (SC, SAFA2). In view of these findings, we preconize malaria prophylaxis and vaccination against Salmonella, Haemophilus and Pneumococcus in sickle cell anemia patients.
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PMID:[Infection profile in sickle cell anemia]. 950 66

Children with SCD are prone to invasive infections caused by S. pneumoniae and H. influenzae. Osteomyelitis is caused most often by Salmonella species and less often by S. aureus. The chest syndrome and its associated microvascular disease carry a risk of prolonged and severe infections for Mycoplasma, Chlamydia, and probably other lower respiratory pathogens, particularly in the group of children with SCD prone to pain or microvascular sequestration, such as those with SC hemoglobinopathy. Despite three decades of investigation, the immunopathologic mechanisms leading to these increased risks is not completely clear. Bone infarction and microvascular disease probably play a part in the predisposition to osteomyelitis. Dysfunctional IgG and IgM antibody response, a lack of splenic clearance, defects in alternative pathway fixation of complement, and opsonophagocytic dysfunction play a role in the predisposition to invasive infection from polysaccharide-encapsulated organisms. Immunization with the conjugate Haemophilus vaccines has largely controlled infections caused by this pathogen. Early recognition of SCD through neonatal screening allows early and vigorous antibiotic management of febrile episodes in children with SCD and has perhaps provided the greatest benefit. Treatment of acute febrile episodes should include antibiotics active against regional strains of S. pneumoniae and H. influenzae, whereas treatment of febrile lower respiratory infections should include macrolide antibiotics that are active against Chlamydia and Mycoplasma, as well as pneumococci and Haemophilus. To date, no convincing evidence exists for the efficacy of pneumococcal polysaccharide vaccines in children with SCD, but preliminary data with the conjugate pneumococcal vaccines in normal children and those with SCD suggest that they may be as successful as Haemophilus vaccines in controlling this infection once they are available. Prophylaxis with daily penicillin administration is recommended and is well founded on clinical trials. However, problems with pneumococcal penicillin resistance and the association of failure with a lack of compliance to antibiotic regimens will dictate continued reexamination of this modality for the prevention of pneumococcal infections.
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PMID:Infections and immunizations of children with sickle cell disease. 1007 55

Sickle cell disease is associated with frequent and often severe infections as a result of immune function impairment and functional asplenia. Also, infection can trigger a vasoocclusive crisis. Pneumococcal bacteremia and meningitis are so severe as to warrant prophylactic penicillin therapy, which has provided a dramatic decrease in early mortality. Bacterial pneumonia is common in patients younger than four years, with most cases being due to S. pneumoniae, Haemophilus influenzae, Mycoplasma pneumoniae, and Chlamydia pneumoniae. Acute chest syndrome is both a difficult differential diagnosis and a common concomitant of bacterial pneumonia. Osteomyelitis is generally due to a salmonella, most often S. enteritidis; multiple foci are common and treatment is difficult, with some patients developing chronic osteomyelitis with sequestration. Parvovirus B 19 infection causes acute bone marrow failure. Malaria does not result in cerebral malaria but can lead to severe anemia or vasoocclusive crisis, and should therefore be effectively prevented. Antimicrobials are generally selected for efficacy against pneumococci (septicemia, meningitis), Salmonella (septicemia, meningitis, osteomyelitis), and mycoplasmas (pneumonia). Prophylactic therapy is of paramount importance and relies on long-term or lifelong penicillin therapy started at four months of age and on closely-spaced immunizations, most notably against pneumococci, the hepatitis B virus, S. typhi, and H. influenzae. Resistant pneumococcal strains have not been reported to cause prophylactic treatment failures. Conjugated pneumococcal vaccines are effective in protecting infants and should therefore be used in sickle cell patients.
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PMID:[Infection and sickle cell anemia]. 1008 75

Over the past 25 years, morbidity and mortality have decreased significantly in children with sickle cell disease, and screening tests are now available to diagnose the disease in newborns. The incidence of sepsis caused by pneumococcal and Haemophilus influenzae infections has declined because of the prophylactic administration of penicillin soon after birth and the timely administration of pneumococcal and H. influenzae type b vaccines. Optimal nutrition can maximize growth in children with sickle cell disease, and timely screening can identify complications such as retinal damage and chronic renal involvement, thereby ensuring prompt treatment. Family physicians and parents who have been educated about sickle cell disease can detect acute, life-threatening complications such as splenic sequestration crisis and acute chest syndrome at their onset, thereby allowing treatment to be instituted without delay.
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PMID:Sickle cell disease in childhood: Part I. Laboratory diagnosis, pathophysiology and health maintenance. 1099 28

We report various pulmonary complications occurring in 88 patients with sickle cell disease: 44 Hb SS, 29 Hb Sb and 15 Hb SC. Pulmonary infections were observed in 20% of patients, and initiated the disease in 7% of cases. They were common in children younger than 10 years especially in Hb SS and Hb Sb patients. Bacteria were identified in 50% of cases predominantly S. pneumoniae, Mycoplasma pneumoniae, and Haemophilus influenzae. Acute chest syndrome occurred in adolescents and adults and was the consequence of pulmonary infarct or embolism which should be differentiated from bacterial pneumonia. Restrive syndrome was present in 2/3 of patients. It was associated to hypoxemia in 80% of cases. Prophylactic therapy was of paramount importance on long-term penicillin therapy and on closely-spaced immunization against pneumococci and Haemophilus influenzae. Blood exchange are indicated in severe hypoxemia.
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PMID:[Pulmonary complications in sickle cell syndromes]. 1102 21

Sickle cell anaemia (SCA) predisposes a child to infections for various reasons, including increased bone marrow turnover, poor perfusion and functional asplenia leading to decreased opsonisation of polysaccharide encapsulated organisms. Bacteria and viruses that most frequently cause serious infections in children with sickle cell disease are Streptococcus pneumoniae, Haemophilus influenzae type b, Salmonella spp., Escherichia coli, Staphylococcus aureus, Mycoplasma pneumoniae, Chlamydia pneumoniae, parvovirus B19 and hepatitis A, B and C viruses. Penicillin prophylaxis has decreased the incidence of infection-related morbidity and mortality significantly in children with SCA. Children <3 years of age are administered oral penicillin 125mg twice daily, and the dose is increased to 250mg twice daily for the >3 to 5 year age group. Adherence to the penicillin prophylactic regimen is recommended for children with SCA who are >5 years of age. For children with SCA who have recurrent invasive pneumococcal infections, an effort is made to keep the child on penicillin prophylaxis indefinitely. The administration of various childhood vaccines has also made an appreciable impact on the overall morbidity and mortality associated with infection in children with SCA. The administration of the heptavalent conjugate pneumococcal vaccine (PCV7) has provided control of invasive pneumococcal infections, and the prophylactic use of the H. influenzae type b conjugate vaccine has reduced the incidence of septicaemia and meningitis caused by this organism. Other vaccines used prophylactically in children with SCA include hepatitis A and B, and vaccines against influenza and varicella viruses. The immediate administration of intravenous antibacterials, after appropriate blood and urine cultures, is of great importance in the treatment of the febrile child with SCA. Ceftriaxone and cefotaxime have been recommended for the treatment of septic episodes in SCA associated with S. pneumoniae, Haemophilus and Salmonella spp. Infection with Yersinia enterocolitica may be treated with cefotaxime or an aminoglycoside. The prevalence of Helicobacter pylori infection in SCA is unknown. Effective therapies include metronidazole, tetracycline or amoxicillin. Parvovirus infections require supportive care and specific antiviral therapy is not indicated. The judicious use of antimicrobials is encouraged in view of the worldwide emergence of multidrug-resistant strains. The long term sequelae associated with infections in children with SCA can be decreased with the implementation of immunisation programmes and effective and prompt treatment with appropriate antibacterials.
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PMID:Prevention and management of infection in children with sickle cell anaemia. 1173 65


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