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

Of 30 sows from a herd believed to be free of Haemophilus pleuropneumoniae infection, 2 had complement-fixing antibodies to H. pleuropneumoniae serotype 5. Necropsy and microbiological examination of the two sows revealed no evidence of H. pleuropneumoniae infection; however, Haemophilus taxon "minor group" and a urease-negative, indole-positive Haemophilus sp. were isolated from numerous respiratory tract sites in both sows. Isolation of these Haemophilus spp. was facilitated by serially diluting specimens in two broth media. Pigs from a closed, respiratory disease-free herd were inoculated with four strains of Haemophilus taxon "minor group" to determine whether the organism induces antibodies which cross-react with H. pleuropneumoniae in the complement fixation test. Antigenic heterogeneity among the taxon "minor group" strains was apparent; however, antibodies cross-reacting between these strains and H. pleuropneumoniae serotypes 1 through 5 and 7 were not detected.
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PMID:Characterization of Haemophilus spp. isolated from healthy swine and evaluation of cross-reactivity of complement-fixing antibodies to Haemophilus pleuropneumoniae and Haemophilus taxon "minor group". 406 24

Accurate prevalence and incidence figures do not exist on a global basis, yet available data suggest that acute respiratory infections in children represent a problem of enormous magnitude. World Health Organization (WHO) data from 88 countries representing 1/4 of the world's population indicate that there are over 666,000 deaths annual from acute respiratory infections. Assuming that nonreporting countries have similar mortality rates, it can be calculated that there are at least 2.2 million deaths from acute respiratory infections throughout the world each year. Despite the enormity of the problem, relatively little is known about the factors that contribute to these deaths in children or adults, or about the extent to which they are due to unusual severity of the disease, lack of access to the health care system, and institutional or social factors. The causative agents are unknown. More knowledge is needed to mount an effective program for the prevention and treatment of acute respiratory infections. In Costa Rica mortality from this disease is 12 times higher in malnourished infants than in those of normal weight. Data from Papua, New Guinea indicate that Streptococcus pneumoniae and Hemophilus influenzae are common etiologic agents. More data of this kind are needed from different countries. Also needed is information on the availability and use of adequate medical care. People in developed countries run a greater risk of dying from lung cancer and cardiovascular diseases than do people in developing countries, but the chances of dying from acute respiratory infections generally exceed those of dying from lung cancer or cardiovascular disease in the developing countries. When evaluating the seriousness of a public health problem it is important to consider the number of years of life that have been lost as well as morbidity and mortality. If there are 2.2 million deaths in the world from acute respiratory infections in children under the age of 1 year, then each year there are almost 200 million death years lost because of acute respiratory infections in the world. Thus, on a global scale acute respiratory infections represent a public health problem of greater magnitude than either heart disease or cancer. The fact that the annual WHO budget for heart disease is at least 50 times higher than the budget for all forms of respiratory disease represents seriously misplaced priorities. Properly organized research programs into the etiologic agents involved in acute respiratory infection, together with data collection on other contributing factors, are required so that effective prevention and treatment programs can be initiated.
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PMID:Acute respiratory infections in children. A global public-health problem. 670 Jun 93

Four patients with severe bronchiectasis (chronic bronchial suppuration) are described who developed cutaneous lesions associated with exacerbations of their respiratory disease. The skin abnormalities consisted of purpuric lesions in three patients and an erythematous vasculitis in one. Circulating immune complexes were present in all patients and in three skin biopsy specimens showed deposition of C3, IgG, and IgA in dermal blood vessels. Haemophilus influenzae had been isolated from the sputum of all four patients and in two patients was present at the time the cutaneous lesions appeared. It is suggested that local immune complex deposition was responsible for the skin lesions which occurred during acute exacerbations of bronchiectasis.
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PMID:Cutaneous vasculitis and immune complexes in severe bronchiectasis. 671 Apr 26

A total of 838 outbreaks of fatal Haemophilus somnus infections in herds of cattle were diagnosed at provincial veterinary laboratories in Manitoba, Saskatchewan, Alberta and British Columbia during the period 1969-1978. The index cases from these outbreaks included 759 cases of thromboembolic meningoencephalitis, 78 cases of fibrinous pneumonia with pleuritis and one case of H. somnus abortion. The epizootics were subdivided on the basis of province, class and age of cattle and seasonal occurrence. Most outbreaks occurred in a feedlot-type of operation, approximately four weeks after arrival of the cattle. There was often a history of respiratory disease prior to an outbreak and in some cases thromboembolic meningoencephalitis had occurred in the herd the preceding year. The average morbidity-mortality ratio was 2.7/1. The average economic loss per herd was $3 190 based on an average of 15 sick animals and five deaths per affected herd.
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PMID:Haemophilus somnus infections I. A ten year (1969-1978) retrospective study of losses in cattle herds in Western Canada. 739 16

Porcine reproductive and respiratory syndrome (PRRS) was first known as blue-eared pig disease in the United Kingdom and the causative agent as 'Lelystad virus'. The disease is characterised by very variable clinical signs, including reproductive failure and respiratory disease. The respiratory syndrome is often associated with severe infection with secondary bacterial agents including Pasteurella multocida, Haemophilus parasuis and Streptococcus suis. However, some seropositive herds show no clinical signs of disease. The secondary infections may be facilitated by the destruction of circulating lymphocytes, by the destruction of the mucociliary clearance system and, most importantly, by a large reduction in the numbers of alveolar macrophages. The clinical syndrome observed in a herd may therefore depend in part upon the other diseases present.
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PMID:Porcine reproductive and respiratory syndrome: clinical disease, pathology and immunosuppression. 770 69

Lower respiratory disease is a major source of morbidity in military recruits, with hospitalization rates for pneumonia more than 30 times that of the non-recruit population. The etiologic agent remains unknown in over 75% of cases. This study prospectively examined the etiology of pneumonia among recruits at Naval Training Center, San Diego, California. Recruits presenting with cough, fever, or shortness of breath and pulmonary infiltrates on chest X-ray were eligible for enrollment. A standardized scoring form and focused physical exam were completed on each subject. Sputum specimens were obtained for Gram's stain and culture, DNA probing for Legionella and Mycoplasma species, and direct fluorescent antibody staining for Legionella. Acute and convalescent serologies were performed for adenovirus, influenza A and B, Mycoplasma pneumoniae, Chlamydia group, and respiratory syncytial virus. Of 110 eligible patients, 100 consented to enrollment and 75 patients completed the study. Etiologic diagnoses were obtained in 40 of the patients (53%). M. pneumoniae, Haemophilus influenzae, and viruses accounted for the majority of infections. Mixed infections were seen in six patients. Forty-seven percent of patients had no diagnosis established. Pneumonia in this series of military recruits was frequently caused by M. pneumoniae and H. influenzae. Fifty percent of cases were undiagnosed with routinely available laboratory methods. Further studies are warranted to more clearly define the etiologic agents of recruit pneumonia and the utility of prophylactic measures.
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PMID:Pneumonia in military recruits. 787 Mar 17

Three field trials were conducted in a large commercial feedlot in Saskatchewan to determine the prevalence of Haemophilus somnus in calves and to evaluate the efficacy of prophylactic mass medication with long-acting oxytetracycline on day 17 (1990, n = 1336), day 11 (1991, n = 4372), or day 8 (1992, n = 5632) postarrival. Hemophilosis accounted for > 40% of the mortality in feedlot calves each year. Haemophilus somnus was cultured from the blood of one febrile calf on day 1 (0.1%, n = 895), but it was not cultured from nasal swabs on day 1 or day 11 (n = 881) or from blood samples on day 11 (n = 883). Similarly, it was not cultured from nasal swabs or blood samples from sick calves first treated for bovine respiratory disease (BRD) (n = 219). Serological titers to H. somnus increased (p < 0.05) in unvaccinated calves from day 1 (Geometric mean titer = 11,846) to day 96 (Geometric mean titer = 63,712), indicating natural infection following feedlot entry. Calves that relapsed twice with BRD or died from BRD +/- hemophilosis had significantly (p < 0.06) lower titers to H. somnus on days 1 and 96 than those that did not relapse twice or die. Postarrival mass medication with long-acting oxytetracycline did not reduce (p > 0.05) the risk of hemophilosis mortality. However, it reduced (p < 0.05) the risk of BRD treatment by 14% and the risk of BRD mortality by 71%. Additional epidemiological studies of H. somnus are needed so that we can develop strategic medication and vaccination programs to reduce losses from hemophilosis.
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PMID:The occurrence of Haemophilus somnus in feedlot calves and its control by postarrival prophylactic mass medication. 799 20

The profile of infection and pattern of bacterial resistance in Eastern Europe is distinct from that observed in other parts of the world. Several Polish investigations have reported that environmental pollution may increase the risk of respiratory disease. Studies from Hungary and Romania have documented a dramatic increase in the proportion of Streptococcus pneumoniae strains resistant to antibiotics. In comparison, resistance to these agents amongst Polish pneumococci isolates is lower, although these pathogens and Streptococcus pyogenes have displayed increasing tetracycline resistance. 20% of Polish Haemophilus influenzae isolates and a high percentage of Moraxella catarrhalis strains exhibit ampicillin resistance. Methicillin-resistant Staphylococcus aureus (MRSA) has been found to constitute 22% of Polish S. aureus strains. Two major clones of MRSA have been identified in Poland which differ in their degree of antimicrobial resistance. The pattern of antimicrobial resistance amongst Polish respiratory pathogens is undoubtedly a reflection of management policies and the use of these drugs. It is hoped that the economic and political changes taking place within Eastern Europe will provide the information and resources to establish more efficient infection control and antibiotic policy and thus delay and limit the appearance of bacterial resistance.
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PMID:Bacterial resistance in eastern Europe--selected problems. 804 55

Two thousand eight hundred ninety-eight children younger than 5 years old were investigated during a 2-year period in a rural area of The Gambia for possible pneumonia, meningitis or septicemia. After clinical examination and appropriate investigations, 1014 children were diagnosed as having pneumonia, 31 as having meningitis and 100 as having septicemia. Nine hundred seven children had a final diagnosis of malaria including 702 who satisfied the World Health Organization criteria for a diagnosis of pneumonia. A bacterial etiology was established in 115 (11%) patients with a final diagnosis of pneumonia, in 25 (81%) with meningitis and in 29 (29%) with suspected septicemia. Overall the pneumococcus was the leading pathogen identified among children with pneumonia and meningitis and ranked third among those with septicemia. However, during the wet season, when malaria transmission was highest, 50% of blood culture isolates obtained from children satisfying the World Health Organization criteria for a diagnosis of pneumonia were Salmonella or coliform species, and the pneumococcus and Haemophilus influenzae type b accounted for only 43% of isolates. Thus enteric bacteria may be as important as those bacteria more usually associated with respiratory disease among children presenting with a clinical picture of pneumonia during the wet season. This finding has important implications for case management and surveillance for antibiotic resistance.
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PMID:Importance of enteric bacteria as a cause of pneumonia, meningitis and septicemia among children in a rural community in The Gambia, West Africa. 819 May 37

The antimicrobial susceptibility trends of bovine respiratory disease (BRD) pathogens isolated from 1988 to 1992 were determined. A total of 880 isolates representing Pasteurella haemolytica, Pasteurella multocida, and Haemophilus somnus were used in the study. Overall, resistance to ampicillin, tetracycline, erythromycin, and sulfamethazine was frequently encountered among strains of P. haemolytica and P. multocida. Ceftiofur, an extended-spectrum cephalosporin originally marketed in 1988 for the treatment of BRD, was very active against the BRD pathogens tested; the MIC of ceftiofur for 90% of isolates tested was < or = 0.06 microgram/ml. Resistance to spectinomycin varied on the basis of the breakpoint used. Substantial variation in the year-to-year susceptibility of BRD pathogens to tilmicosin, a new macrolide antimicrobial agent, was observed. The proportion of susceptible P. haemolytica isolates ranged from 84.7% in the second year to 7.1% in the third year and 78.2% in the fourth year. Similar fluctuations were observed with strains of P. multocida.
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PMID:A 4-year survey of antimicrobial susceptibility trends for isolates from cattle with bovine respiratory disease in North America. 819 85


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