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 59,461 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Genital mycoplasmas have been implicated in different neonatal diseases as pneumonia, sepsis and meningitis. This prospective study was conducted to specify their role in these diseases. POPULATION AND METHODS--A pharyngeal or tracheal swab specimen for mycoplasmas culture was obtained from 100 infants admitted consecutively to the Neonatal Care Unit (NCU) during the first 24 hours of life. Mycoplasma culture of blood and cerebrospinal fluid was also performed. Pharyngeal and/or tracheal specimens were collected again on days 5, 15 and 28 if the child was still in the NCU. Mycoplasma hominis (Mh) and Ureaplasma urealyticum (Uu) were identified by culture in a modified Hayflick's medium. RESULTS--Three-hundred and ten pharyngeal or tracheal swabs were obtained (100 on day 0, 89 on day 5, 72 on day 15 and 49 on day 28). Twenty-one infants had one or more positive swabs in the first five days of life (20 on day 0 and one on day 5); those forming the "Myco+" group and the others forming the "Myco-" group. Uu was isolated alone from 20 infants, associated with Mh from one. Both groups were similar for gestational age, birth weight, maternal fever during labor, prolonged rupture of the fetal membranes or chorioamnionitis and for the incidence of acute respiratory distress. There was a statistically significant difference for the route of delivery (chi 2 < 0.02). One blood culture (from 92 performed) was positive for Uu and another positive for Uu and Mh. Both children were cured without any specific mycoplasmacidal therapy. Three children had probable Uu infection and were also cured without specific therapy. CONCLUSIONS--A pharyngeal colonization with genital mycoplasmas is common in the first days of life (21%) but our data do not allow us to conclude that they are accountable for newborn infections.
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PMID:[Prospective study of neonatal genital mycoplasma colonization and infection]. 766 51

Seventeen complicated outbreaks of infectious coryza in layer, broiler-breeder, and broiler flocks were studied. In the layer flock outbreaks, drops in egg production of up to 35% were seen. In the broiler flocks and several of the layer flocks, losses due to persistent mortality and/or culling varied between 2 and 5%. Signs of infectious coryza in both layers and broiler-breeders were typical; in broilers, however, swollen head-like syndrome was seen. Except in one flock, no viral diseases were clinically or serologically detected. Excluding broiler-breeders, birds from most other flocks were serologically positive for Mycoplasma gallisepticum, and some were also positive for M. synoviae. Haemophilus paragallinarum was isolated from all of the outbreaks, but only as a pure culture in three outbreaks. Isolation of H. paragallinarum from sites such as liver, kidney, and particularly tarsal arthritis and ocular globes appears to be reported for the first time. Serovar A was isolated in eight outbreaks, serovar B in six, serovar C in one, and untypable serovars in two. The severity of these infectious coryza outbreaks may have been increased by concurrent salmonellosis, pasteurellosis, and mycoplasmosis, although under certain conditions H. paragallinarum is able to cause septicemia. Ten of the outbreaks occurred in birds vaccinated against infectious coryza; this may be due to the use of vaccines that do not provide protection against the types of H. paragallinarum that affect poultry in the region.
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PMID:Complicated infectious coryza outbreaks in Argentina. 783 27

We studied the clinical efficacy of biapenem (L-627), a new parenteral carbapenem beta-lactam antibiotic in the pediatric field. L-627 was administered intravenously to 11 patients with ages ranging 2 months to 10 years and 5 months with acute infectious diseases. Doses ranged 28.1 to 72.6 mg/kg/day. The diagnosed diseases included 7 respiratory tract infections, 1 purulent meningitis, 1 sepsis, 1 cervical lymphadenitis and 1 urinary tract infection. Two of these cases one with Mycoplasma infection and the other which had been administered with other antimicrobial agents were not evaluated. The clinical efficacy rate was 77.8% (7/9) and the bacteriological eradication rate was 66.7% (4/6). Laboratory examinations revealed that there was one case with elevated liver enzyme levels with showing elevation of GOT, GPT and LDH. No other side effects attributable to this drug were observed. Thus, it appears that L-627 is a useful antibiotic in treating moderate to severe acute bacterial infections in children.
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PMID:[Clinical evaluation of biapenem (L-627), a new carbapenem antibiotic in the pediatric field]. 793 26

This introductory, review presentation is a prologue to four full-length symposium presentations. Estimates of the annual cost of skeletal problems in poultry and definitions of noninfectious skeletal diseases in poultry are the focus of this article. Losses due to skeletal problems in poultry are caused by an increase in mortality and the number of cull birds, increased condemnations from septicemia-toxemia, and more downgrading from the trimming of breasts and legs. Reduced feed conversion and rate of gain also occur. Estimated annual losses in the United States due to skeletal problems are $80 to $120 million in broilers, and $32 to $40 million in turkeys. Eleven skeletal problems in poultry are described, and synonyms, symptoms, and possible causes of each are presented. These diseases include long bone distortion, tibial dyschondroplasia, rickets, spondylolisthesis, degeneration of the femoral head, spraddled legs, chondrodystrophy, osteomyelitis and synovitis, Mycoplasma synoviae infection, viral arthritis, and footpad dermatitis.
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PMID:Skeletal problems in poultry: estimated annual cost and descriptions. 807 32

Mycoplasma mycoides ssp. mycoides LC (large colony type) (MML) was isolated from three 2 to 6 weeks old wild goat kids (Capra aegagrus cretica) dead of septicemia in a Swiss zoo. Necropsy revealed peritonitis, pneumonia and enteritis. MML was isolated out of the ear canal of most of the healthy animals in the flock. The high density of the animals, the presence of concomitant diseases and the carriage among healthy animals seem to have been important predisposing factors for the MML-infection.
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PMID:[Infection with Mycoplasma mycoides ssp. mycoides LC (large colony type) in bezoar goat kids (Capra aegagrus cretica) in the Bern (Switzerland) Zoo]. 809 Nov 81

The family Pasteurellaceae Pohl contains Gram-negative, facultatively anaerobic and fermentative bacteria of the genera Pasteurella, Haemophilus, and Actinobacillus. Approximately 20 different species of the genus Pasteurella have been identified using phenotypic and genetic analyses. Of these species, P. multocida and P. haemolytica are the most prominent pathogens in domestic animals causing severe diseases and major economic losses in the cattle, swine, sheep, and poultry industries. Mechanisms of immunity to these bacteria have been difficult to determine, and efficacious vaccines have been a challenge to develop and evaluate. Pasteurella multocida of serogroups A and D are mainly responsible for disease in North American poultry and pigs and to a lesser extent in cattle. Fowl cholera in chickens and turkeys is caused by various serotypes of P. multocida serogroup A and characterized by acute septicemia and fibrinous pneumonia or chronic fibrinopurulent inflammation of various tissues. Current biologicals in use are live P. multocida vaccines and bacterins. Potency tests for avian P. multocida biologicals are a bacterial colony count for vaccines and vaccination and challenge of birds for bacterins. Somatic antigens, particularly lipopolysaccharide (LPS), appear to be of major importance in immunity. In North American cattle, P. multocida serogroup A is associated mainly with bronchopneumonia (enzootic pneumonia) in young calves; however, it is occasionally isolated from fibrinous pleuropneumonia of feedlot cattle (shipping fever). Biologicals currently available are modified-live vaccines and bacterins. The potency test for vaccines is bacterial colony counts. The test for bacterin potency is vaccination and challenge of mice. Important immunogens have not been well characterized for P. multocida infection in cattle. In swine, P. multocida infection is sometimes associated with pneumonia; however, its major importance is in atrophic rhinitis. A protein toxin (dermonecrotic toxin), produced by toxigenic strains of P. multocida types A and D, and concurrent infection with Bordetella bronchiseptica appear to be the major factors in development of atrophic rhinitis. Currently available biologicals are bacterins and inactivated toxins (toxoids). The toxin appears to be the major immunogen for preventing atrophic rhinitis. There are, however, no standardized requirements for potency testing of P. multocida type D toxoid. Various serotypes of P. haemolytica biotype A are responsible for severe fibrinous pleuropneumonia of cattle and sheep, occasionally septicemia of lambs, and mastitis in ewes. Several serotypes of P. haemolytica biotype T are isolated from acute septicemia of lambs. The currently available P. haemolytica biologicals are modified-live vaccines, bacterins, bacterial surface extracts, and culture supernates that contain an exotoxin (leukotoxin).(ABSTRACT TRUNCATED AT 400 WORDS)
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PMID:Immunogens of Pasteurella. 811 91

The role of genital mycoplasmas in the pathogenesis of neonatal infection is incompletely understood. We performed nasopharyngeal, blood and cerebrospinal fluid (CSF) cultures for Mycoplasma hominis and Ureaplasma urealyticum in 69 neonates who underwent a diagnostic workup for suspected sepsis. The mean gestational age was 35.9 weeks (range, 25 to 42 weeks) with a mean birth weight of 2386 g (range, 652 to 4420 g). Twenty-seven infants (39.1%) had positive nasopharyngeal cultures; 6 were positive for M. hominis, 10 for U. urealyticum and 11 for both organisms. Seven (26%) of these 27 patients developed chronic lung disease compared with 2 (4.7%) infants in the non-colonized group. Nine infants had positive CSF cultures for M. hominis and one infant had a positive CSF culture for U. urealyticum. All blood cultures were sterile. One of the infants with a positive CSF culture for M. hominis had clinical evidence of systemic infection. All of the infants were treated with antibiotic agents that were not active against mycoplasmas. These data indicate that genital mycoplasmas can be found commonly in the CSF and nasopharynx of infants with suspected sepsis. Their etiologic role in the causation of infection and chronic lung disease, however, remains unclear.
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PMID:Mycoplasma hominis and Ureaplasma urealyticum in neonates with suspected infection. 834 98

DNA-DNA hybridization experiments were carried out in order to clarify the taxonomic relationships between the F38 group of caprine mycoplasmas, the established etiologic agents of classical contagious caprine pleuropneumonia, and Mycoplasma capricolum, an organism associated with septicemia, arthritis, and mastitis in goats and sheep. The taxonomic status of the F38 group has been uncertain, principally because of the serological, genomic, and other properties which it shares with M. capricolum. Tritium-labeled DNAs from the M. capricolum type strain (California kid) and from prototype strain F38 were hybridized with unlabeled DNAs from these two strains and from four other isolates belonging to each group. The results showed consistent DNA relatedness values of about 70% between the F38 and M. capricolum groups, compared with levels of relatedness of about 90 and 85%, respectively, for the strains within each group. In addition, the results of comparisons of these 10 strains in which growth inhibition and immunofluorescence tests were used confirmed the previously reported serological relationships between the two groups and reinforced other observations concerning their shared genomic and cell membrane characteristics, indicating that there is a close taxonomic relationship. However, as the 70% DNA relatedness values between the M. capricolum and F38 groups also indicate a degree of genomic difference inconsistent with a relationship at the species level, we conclude that our findings support previous proposals for classification of the F38 group as a subspecies of M. capricolum.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:DNA relatedness between field isolates of Mycoplasma F38 group, the agent of contagious caprine pleuropneumonia, and strains of Mycoplasma capricolum. 834 16

A case of Fusobacterium necrophorum bacteremia and multiple brain abscesses in a 6-year-old child following a Mycoplasma pneumoniae infection is described. Brain abscess due to this microorganism has only been described in three other cases since 1977. The clinical picture was consistent with postanginal septicemia, with septic metastatic complications normally only seen in teenagers and young adults. The patient was successfully treated with a 2-month course of parenteral penicillin G and metronidazole.
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PMID:Multiple brain abscesses and bacteremia in a child due to Fusobacterium necrophorum. 836 15

We retrospectively studied 42 patients hospitalized for Stevens-Johnson syndrome at the Veterans General Hospital-Taipei between 1979 and 1991. Twenty-seven patients were males and 15 females; the ages ranged from 7 months to 82 years old with a mean age 50. The most common precipitating factor was drugs among which diphenylhydantion was the leading offender followed by nonsteroidal anti-inflammatory agents and allopurinol. Sixteen cases might be etiologically associated with infection, including 13 with upper respiratory infection, one with acute hepatitis B, one with pulmonary tuberculosis, and one with fever of unknown origin that was suspected to be viral infection. Although mycoplasma infection was thought in the literature to be a common etiologic factor of Stevens-Johnson syndrome, it was scarcely found in our study. Four patients were not treated with systemic steroids but still recovered uneventfully. Systemic steroid as a whole was not proved to be necessary, but early large-dose steroid therapy might abbreviate the course of the disease. The mortality rate was 11.9% which differs unremarkably from the reported rate (5-15%). Two patients died of pneumonia with sepsis, one of hemorrhagic shock (bleeding of adenocarcinoma of stomach), one of aspiration pneumonia, and one of sepsis with disseminated intravascular coagulation, upper gastrointestinal bleeding, and hyperglycemic hyperosmolar nonketotic coma.
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PMID:[Stevens-Johnson syndrome: a review of 42 cases]. 849 Jul 98


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