Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0348321 (Haemophilus)
 15,372 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Sore throats are most commonly due to infections, many of which are viral and do not require specific treatment. Symptoms and signs of the common cold, influenza or croup, the occurrence of conjunctivitis in some adenoviral infections, generalised lymphadenopathy and splenomegaly in glandular fever or the presence of vesicles characteristic of herpangina (Coxsackie A virus) or of herpes simplex infection, occasionally enable a clinical diagnosis and avoid the need for antibiotic therapy. In the case of treatable conditions a typical membrane may suggest diphtheria, a scarlatiniform rash infection due to Streptococcus pyogenes or to Corynebacterium haemolyticum, and a cherry-red epiglottis Haemophilus influenzae type b. Associated atypical pneumonia suggests infection with Mycoplasma pneumoniae or Chlamydia pneumoniae. Pharyngitis due to Neisseria gonorrhoeae may be accompanied by infection at other sites or by other sexually transmitted diseases. Candidal infection, in the appropriate clinical circumstance, should suggest HIV infection. Surgical drainage is required in the case of peritonsillar or retropharyngeal abscess. Noninfectious cases of sore throat, e.g. thyroiditis, are relatively uncommon considerations in the differential diagnosis of acute febrile pharyngitis. The most common problem is to recognise streptococcal pharyngitis, which requires antibiotic treatment for 10 days to avoid the risk of rheumatic fever.
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PMID:The sore throat. When to investigate and when to prescribe. 207

Major advances in our understanding of the role of the neutrophil in host defense against periodontal organisms have been made through studies of localized juvenile periodontitis (LJP). Several lines of evidence suggest that LJP is an infectious process closely associated with Actinobacillus (Haemophilus) actinomycetemomitans as a causative agent, although other organisms may also participate. The immunologic profile of LJP patients suggests that a cell-associated neutrophil locomotory dysfunction is a key underlying immunodeficiency resulting in increased susceptibility to periodontal infection. In addition, LJP patients often exhibit cervical lymphadenopathy and IgG-hypergammaglobulinemia, and a markedly elevated antibody response to the infecting organism, A. actinomycetemcomitans, is found in the serum and crevicular fluid of most patients. Evaluation of the locomotory properties of LJP neutrophils shows that random migration and chemokinesis are normal; however, about 70% of the LJP patients suffer from a defect in chemotaxis, with their neutrophils responding poorly to bacterial chemotactic factors, synthetic chemotactic peptides, and complement fragments (C5a). Depressed chemotaxis of LJP neutrophils is paralleled by their reduced capacity to bind the synthetic chemotactic peptide N-formylmethionylleucylphenylalanine (FMLP), as well as C5a. Furthermore, there is a reduction in the amount of glycoprotein 110, a neutrophil membrane matrix component and differentiation antigen which is associated with FMLP- and possibly also C5a-mediated chemotaxis. Reduction of C5a and of FMLP ligand binding, decreased expression of GP-110, and reduced neutrophil chemotaxis are consistent with a stem cell maturation error in LJP patients. This is further supported by studies demonstrating increased expression of CR2, the C3d/EBV receptor, on peripheral blood neutrophils of LJP patients. CR2 receptors are normally present on immature human neutrophils but are lost during the maturation process. These alterations in neutrophil surface components and their reduced chemotaxis may result from a genetically determined abnormality. Studies demonstrating the familial nature of both the neutrophil chemotactic disorder and the clinical entity represented by localized juvenile periodontitis point to a strong role for genetic determinants in the disease which affect neutrophil surface receptors.
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PMID:1985 Kreshover lecture. Molecular factors influencing neutrophil defects in periodontal disease. 302 65

Hemophilus parainfluenzae, a common upper respiratory tract pathogen, has been reported to cause pharyngitis, epiglottitis, otitis media, conjunctivitis, and pneumonia. Rarely H. parainfluenzae infects the urinary tract, and is believed not to have been previously reported as a cause of prostatitis. A case of H. parainfluenzae in a young homosexual man infected with HTLV-III and chronic lymphadenopathy is described. Common clinical syndromes such as prostatitis may be associated with unusual pathogens in persons immunodeficient due to HTLV-III infection.
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PMID:Hemophilus parainfluenzae prostatitis in a homosexual man with chronic lymphadenopathy syndrome and HTLV-III infection. 379 81

Diagnosis of erysipelas is based upon the association of an acute inflammatory plaque with fever, lymphagiitis, adenopathy and hyperleukocytosis. These associated symptoms are variable (20-70 p. 100 of cases). Bacteriology is not helpful for the diagnosis of erysipelas because of a low sensitivity (hemoculture 5 p. 100, standard examinations 5-41 p. 100), or delayed positivity (serology). Moreover cutaneous bacteriology is difficult to assess when other bacteria than streptococci are isolated. Erysipelas have to be distinguished from non-necrotizing cellulitis by peculiar clinical features (such as erysipeloid, facial staphylococcal infection, Pasteurella, Haemophilus influenzae) and from necrotizing fasciitis. Some non-infectious diseases may mimic erysipelas such as venous thrombosis, familial Mediterranean fever, prosthesis intolerance, and compartment syndrome. Because the diagnostic value of clinical symptoms is not known and no diagnostic gold standard has been established, it is impossible to be sure that non-streptococcal erysipelas (especially staphylococcal) really exists. Thus, the first line treatment for all erysipelas must be an antistreptococcal antibiotic. Before prescribing a treatment, hemoculture and blood cell count could be useful. If antistreptococcal antibiotherapy is inefficient, all the differential diagnoses must be reviewed.
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PMID:[Diagnostic criteria for erysipelas]. 1131 59

Agammaglobulinemia is the most common primary immunodeficiency, with an incidence of approximately 1 in 250,000 males in the United States. These patients are at risk for frequent recurrent infections, which may become fatal if untreated. Patients have increased susceptibility to encapsulated pyogenic bacteria. Haemophilus influenzae is second only to Streptococcus pneumoniae as the bacteria most frequently implicated in infections in these patients. We present a case involving an adolescent boy with X-linked agammaglobulinemia and H influenzae cervical adenopathy, confirmed twice by culture. We correlate the clinical, microbiologic, and histologic findings. Owing to the severity of infections in this population, surgical intervention is more common than in the immunocompetent population. This description may help the pathologist in considering a differential diagnosis when examining a diagnostic lymph node biopsy in these patients.
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PMID:Haemophilus influenzae lymphadenopathy in a patient with agammaglobulinemia: clinical-histologic-microbiologic correlation and review of the literature. 1562 87

Many hyperplasias and lymphomas of marginal zone B-cells are associated with infection. We identified six children and one adolescent with cervical lymphadenopathy showing prominent polyclonal nodal marginal zone hyperplasia (pNMZH) and four adolescents with monoclonal paediatric nodal marginal zone lymphoma (pNMZL). The clonality status was assessed using BIOMED-2-IG PCR analysis. Haemophilus influenzae was identified in all six cases of pNMZH that could be tested by direct culture (N = 3) or a very sensitive PCR for the H. influenzae gyrase gene in frozen materials (N = 5). H. influenzae was not detected in three pNMZLs and 28 non-specific reactive cervical lymph nodes of age-matched controls, except for a single control node that was obtained during oropharyngeal surgery for a cleft palate showing very low copy numbers of H. influenzae. pNMZH patients were younger than pNMZL patients (median age 12 versus 21 years). pNMZH showed a prominent nodular appearance with variable fibrosis without acute inflammation. Within the nodules, the expanded germinal centres and variably sized marginal zones were colonized by activated B-cells with weak expression of IgD and lack of CD10 and/or BCL6 expression. Some areas showed skewed light chain expression in plasma cells (4/5 cases lambda). In four cases tested, this was confirmed by flow cytometry for surface Ig (3/4 cases lambda). In contrast, pNMZL showed more extensive expansion of marginal zones by centrocytoid cells and often expression of BCL2 protein. Several H. influenzae strains are known to interact with the constant part of IgD on human B-cells, leading to their polyclonal proliferation and activation. We speculate that in vivo stimulation of IgD+ marginal zone B-cells by this bacterium may be implicated in this particular lymphadenopathy that should be distinguished from monoclonal pNMZL.
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PMID:Paediatric nodal marginal zone B-cell lymphadenopathy of the neck: a Haemophilus influenzae-driven immune disorder? 2572 8

Chancroid (also known as soft chancre and ulcus molle) is a sexually transmitted disease (STD) due to the Ducrey's bacillus (or Haemophilus ducreyi) characterized by chancre at the site of ulcerated inoculation associated with lymphadenopathy. The disease manifests as a small pinkish papule at the site of penetration of the bacterium. After an incubation period ranging from 24 hours to 15 days (on average 5 days). The lesion rapidly evolves into a more or less extended pinkish, painful, deep ulcer with very inflamed and sharp edges and a ragged appearance. The lymphadenopathies usually occur 2-3 weeks after the contact. They are often unilateral and can evolve into ulcers with pus discharge at the level of the skin. Some complications can occur: penile gangrene, extended gangrene of the skin, local superinfection, association with other sexually transmitted diseases. Bacterium can be identified by microscopic examination of a smear of the chancre-like ulcer, more rarely by fine-needle puncture biopsy of a lymphadenopathy. Giemsa or Pappenheim coloration allows identification of the germ. Treatment is based on azithromycin (1 g per os in a single dose) or ceftriaxone (250 mg administered intramuscularly in a single dose). We report the case of a 30-year old man with well-defined deep scrotum ulcer with necrotic center which occurred 1 week after unprotected sexual intercourse. Haemophilus ducrey has been detected by culture and the patient underwent Azithromycin therapy with good outcome.
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PMID:[Chancroid]. 3156 45

Chancroid (also known as soft chancre and ulcus molle) is a sexually transmitted disease (STD) due to the Ducrey's bacillus (or Haemophilus ducreyi) characterized by chancre at the site of ulcerated inoculation associated with lymphadenopathy. The disease manifests as a small pinkish papule at the site of penetration of the bacterium. After an incubation period ranging from 24 hours to 15 days (on average 5 days). The lesion rapidly evolves into a more or less extended pinkish, painful, deep ulcer with very inflamed and sharp edges and a ragged appearance. The lymphadenopathies usually occur 2-3 weeks after the contact. They are often unilateral and can evolve into ulcers with pus discharge at the level of the skin. Some complications can occur: penile gangrene, extended gangrene of the skin, local superinfection, association with other sexually transmitted diseases. Bacterium can be identified by microscopic examination of a smear of the chancre-like ulcer, more rarely by fine-needle puncture biopsy of a lymphadenopathy. Giemsa or Pappenheim coloration allows identification of the germ. Treatment is based on azithromycin (1g per os in a single dose) or ceftriaxone (250mg administered intramuscularly in a single dose). We report the case of a 30-year old man with well-defined deep scrotum ulcer with necrotic center which occurred 1 week after unprotected sexual intercourse. Haemophilus ducrey has been detected by culture and the patient underwent Azithromycin therapy with good outcome.
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PMID:[Lentigines]. 3169 7