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

Group B streptococci continue to be major perinatal pathogens, both for mothers and their infants, and are associated with significant morbidity, mortality, and its attendant cost to society. Approaches to prevention are directed toward either eliminating exposure to the organism or enhancing host resistance, that is, chemoprophylaxis and immunoprophylaxis. Intrapartum chemoprophylaxis has been shown to effectively interrupt vertical transmission of group B streptococci from the genitally colonized mother to the infant and to decrease the incidence of both maternal and early-onset neonatal group B streptococcal disease. To avoid unnecessarily exposing large numbers of colonized women to antibiotics, only those with defined risk factors should be selected for intrapartum chemoprophylaxis. This regimen is ampicillin given intravenously, 2 g initially at onset of labor or rupture of membranes, followed by 1 g every 4 hours until delivery. Risk factors include premature onset of labor or rupture of membranes before 37 weeks' gestation, rupture of membranes of more than 12 hours, intrapartum fever, group B streptococcal bacteriuria, or having previously delivered an infant with group B streptococcal disease. Detection of anogenital colonization is accomplished either by culture late in the second or early in the third trimester or by intrapartum group B streptococcal antigen testing of vaginal swabs from those previously culture-negative or not cultured. Although this approach combines the advantages of several proposed strategies, it will still miss those cases of group B streptococcal disease developing in the absence of discernible risk factors. Intrapartum prophylaxis does not prevent late-onset group B streptococcal disease. Prenatal and postnatal chemoprophylaxis have not been shown to be effective. Symptomatic infants born to mothers given chemoprophylaxis should be evaluated for neonatal sepsis and treated accordingly. This approach is also suggested for asymptomatic premature infants, those whose mothers have not received adequate prophylaxis or have previously delivered infants with group B streptococcal disease, and for twin siblings of infants developing group B streptococcal disease. Successful implementation of this approach may be limited by the availability and sensitivity of the rapid antigen test used. Immunoprophylaxis, and active immunization in particular, is the most promising method of preventing perinatal group B streptococcal disease in mothers and their infants, including late-onset disease. Immunization of pregnant women with type III polysaccharide vaccine has resulted in adequate provision of functional antibody to the infants born to responders.(ABSTRACT TRUNCATED AT 400 WORDS)
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PMID:Prevention of group B streptococcal infection. 157 22

Upon admission to Box Hill Hospital in Victoria, Australia, a 38-year old woman was pale and febrile (328.6 degrees Celsius) and had a pulse of 88 beats/minute. She had had midabdominal pain for 1 week and severe lower abdominal pain for 2 days. Her menses were heavy. Other than pain during examination, rectal and vaginal examinations were normal. She had considerable neutrophilia (leukocyte count = 21.2 x 1 billion). The X-ray revealed free fluid. Ultrasonography indicated an IUD which she had had for 10 years, a mass with small cystic areas near the right ovary, and fluid in the rectouterine pouch. The physicians suspected peritonitis and administered iv broad spectrum antibiotics (1 mg ampicillin, 80 mg gentamicin, and 500 mg metronidazole) every 8 hours. They did a laparotomy. An abscess containing much green pus, the necrotic right ovary, and the appendix, which appeared normal and later shown not to be infected, occupied the right iliac fossa. The tubes were fine. The surgeons removed the appendix and right ovary. They washed out the abdomen with saline and inserted a drain to the right iliac fossa. The woman improved immediately so the physicians stopped antibiotics 3 days after surgery. Histological tests revealed actinomycosis caused by fast-growing aerobic bacteria which is known to cause necrosis, fibrosis, and suppuration. During recovery, the physicians removed the IUD and performed dilation and curettage. Actinomyces normally just dwell in the mouth and intestines, but, in this case, probably migrated up the IUD tail after spreading from the bowel to the perineum to the vagina. The physicians suspected that the presence of Mycoplasma hominis provided the mucosal breach needed to permit actinomyces' invasion. Physicians should consider actinomycosis in acute abdominal sepsis cases with a longterm use of an IUD. They can treat it with antibiotics since Actinomyces tend to be sensitive to broad spectrum antibiotics.
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PMID:Ovarian actinomycosis presenting as acute peritonitis. 158 8

An epidemiological survey of penicillin resistance as determined by minimum inhibitory concentrations (MICs) in Streptococcus pneumoniae strains collected from several Hungarian laboratories in 1988-1989 indicated a prevalence of 58% among a total of 135 isolates. A significantly higher resistance rate (69.2%) was found for isolates from pediatric patients than from adult patients (44.0%). Penicillin-resistant strains were more frequently resistant to non-beta-lactam antibiotics (tetracycline, erythromycin, co-trimoxazole, and chloramphenicol) than were penicillin-sensitive strains. On the basis of the MIC50 and MIC90 values of ampicillin and five cephalosporins for penicillin-resistant strains, it was established that ampicillin and cephalexin were not superior to penicillin. The low MIC90 of ceftriaxone and cefotaxime for these organisms reflects promising therapeutic potential, even in septicemia and meningitis caused by penicillin-resistant strains. The therapeutic alternative to penicillin in the treatment of respiratory tract infection may be second-generation cephalosporins such as cefuroxime or cefamandole.
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PMID:Pneumococcal antimicrobial resistance: the problem in Hungary. 161 49

Physicians admitted a 45-day old boy to King Khalid University Hospital in Riyadh, Saudi Arabia who had had a fever (39.8 degrees Celsius) for 2 days. He was irritable and did not feed very well at the breast. He was a healthy full term infant. The physicians could not identify an infection in the infant. 2 weeks before the infant became ill, the mother had a fever, progressive malaise, and right hip pain for 5 days. Based on a positive Brucella serology, her physician treated her with tetracycline and streptomycin. She exclusively breastfed the infant during the illness. Neither the mother nor the infant had any contact with farm animals, but a friend did give the mother raw goat milk 2 weeks postpartum. 79% of the white blood cell count contained lymphocytes. They believed he had bacterial sepsis so they treated him with intravenous ampicillin and cloxacillin. His temperature peaked daily between 38-39 degrees Celsius for the 1st 3 days. After hearing of the mother's illness with brucellosis and since the blood, urine, and cerebrospinal fluid cultures were negative for common bacterial pathogens, the physicians then administered oral trimethoprim-sulphamethoxazole and rifampicin for 6 weeks. His condition improved quickly and by day 7 the fever had subsided. 2 weeks after admission, his Brucella agglutination titer was 1:160 and his blood culture grew Brucella melitensis. At the same time, they measured the mother's blood and breast milk titers which were both positive (1:320 and 1:640 respectively). They could not isolate B. melitensis in either her blood or breast milk, however. Perhaps the antibiotics wiped out the organisms. 1 year after admission, the boy was fine. Seroconversion occurred within 2 weeks which may mean that he acquired brucellosis recently and postnatally. The physicians believed that the only route of transmission was breast milk.
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PMID:Probable breast-milk borne brucellosis in a young infant. 170 49

Most prospective studies recommend antibiotic prophylaxis whilst a thoracostomy tube is in place or even longer. We conducted a randomised study of 188 patients with penetrating chest injuries requiring a chest drain. Of these patients, 95 received a single dose of ampicillin before insertion of the chest tube, the remaining 93 patients received additional antibiotic prophylaxis for as long as the drain was in place. The incidence of intrathoracic sepsis (pneumonia or empyema) was 3.1% and 3.2%, respectively. It is concluded that single-dose prophylaxis in penetrating chest trauma is as effective as prolonged prophylaxis. The importance of chest physiotherapy immediately after the drain insertion and of early removal of the drain is stressed. The role of various possible risk factors in the development of sepsis is discussed.
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PMID:Antibiotic prophylaxis in penetrating injuries of the chest. 175 62

In order to identify the cause of septicemia and the resistance patterns of bacteria in Swedish patients with hematological disorders, all positive blood cultures collected at a hematological ward during 1980-1986 were evaluated retrospectively. 198 episodes of septicemia in 129 patients were recorded. 54% were males and 46% women with a median age of 67 years (range 16-88). Patients with acute leukemia (46%), lymphoma (19%) and myeloma (19%) dominated. The absolute neutrophil count (ANC) was less than 0.5 x 10(9)/l in 76% of the bacteremic episodes. A total of 253 consecutive isolates were found with 53% Gram-negatives and 47% Gram-positives. The dominating pathogens were Escherichia coli (27%), klebsiella/enterobacter (15%), pseudomonas (7%), coagulase negative staphylococci (13%), alpha-streptococci (13%), Staphylococcus aureus (10%) and anaerobes (6%). Coagulase negative staphylococci showed a significant increase in isolation rate during the study period. The majority of E. coli were resistant to ampicillin. The susceptibility of klebsiella/enterobacter to ceftazidime and cefuroxime was reduced, while no imipenem resistant strains occurred. Among coagulase negative staphylococci 61% were resistant to isoxazolylpenicillin, none to vancomycin. No dramatic changes in the etiology of septicemia or the susceptibility pattern during the study period were noticed. Coagulase negative staphylococci, S. epidermidis in particular, constitute an increasing problem among granulocytopenic patients.
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PMID:Septicemia in patients with hematological disorders and neutropenia. A retrospective study of causative agents and their resistance profile. 176 55

Enterococci are increasing in importance as nosocomial pathogens and causes of severe sepsis in immunocompromised patients. From September to November 1989, a survey of 898 enterococcal isolates showed that 52 had acquired high-level resistance to penicillin and ampicillin (MIC greater than 100 mg/l). These were all Enterococcus faecium, did not produce beta-lactamase and showed high-level resistance to gentamicin and streptomycin as well. The majority were urinary isolates, but a few caused bacteraemia in severely ill patients. The potential spread of these highly-resistant enterococci would limit the therapeutic options for systemic infections.
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PMID:Enterococci highly resistant to penicillin: characterizing isolates from Singapore hospitals. 178 91

From January 1981 to December 1988, we collected 11 cases of neonatal meningitis caused by Flavobacterium meningosepticum. The 6 male and 5 female newborns ranged from 3 days to 20 days old. Birth body weight varied from 1100 gm to 3600 gm. Seven cases were premature or small for date. Nosocomial infection was noted in 7 of these 11 cases. Clinically, lethargy and poor activity were the most common symptoms. Cyanosis, fever and convulsion were the next. There were 9 cases showing pleocytosis, increased protein and decreased glucose level in the cerebrospinal fluid examination. The organisms isolated in all 11 cases were susceptible to piperacillin, resistant to ampicillin, aminoglycosides and cephalosporin. Five patients were treated with antibiotics other than piperacillin for 5 to 18 days. Three patients died; hydrocephalus was the cause of death in 2 of them. Two patients were discharged against advice. Among the remaining 6 cases we gave piperacillin for 3 weeks, one case developed hydrocephalus but eventually succumbed to K. pneumoniae sepsis. Out of five surviving cases, 3 developed hydrocephalus (VP shunt performed in two). The other two patients were discharged without neurological deficit. In conclusion, neonatal Flavobacterium meningosepticum meningitis was more frequent in premature or small for date babies, and it usually appeared in nosocomial infection. The prognosis was poor and piperacillin was proved to be the drug of choice.
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PMID:[Clinical observation of neonatal meningitis caused by flavobacterium meningosepticum]. 177 41

The septicemia caused by the Arizona group organism is rare and usually observed in adults with underlying diseases. In Korea, Salmonella infection is common, but a report of Arizona infection is unknown. We isolated S. entercia subsp. diarizonae from blood of a 6-month-old infant. The serovar was determined as 28:z10:-, a rare one in America. The isolate was susceptible to ampicillin, chloramphenicol, cotrimoxazole and others. The patient rapidly recovered with ampicillin and gentamicin therapy. Clinical laboratories should consider that the infection exists in Korea and should attempt to isolate and identify Arizona organism in certain patients.
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PMID:Salmonella enterica subspecies diarizonae bacteremia in an infant with enteritis--a case report. 178 Nov 88

Between March 1987-January 1988, physicians enrolled 60 pediatric patients with a fever who were admitted to the Kenyatta National Hospital in Nairobi, Kenya for various clinical conditions in a study to determine the types, frequency, and antibiotic sensitivity patterns of aerobic and facultative bacterial isolates. Most of the patients were 13 months-4 years old (45%). 31.7% of the patients had positive blood cultures. Staphylococcus aureus was the 2nd most common bacteria (15.8%) among these patients. Laboratory personnel isolated Salmonella typhimurium in most patients (63%). In fact, during the same period, the Diagnostic Microbiology Laboratory at the hospital identified Salmonella species in 48% of all isolated bacteria and 35% of these were S. typhimurium. S. typhimurium tended to be present in children with gastroenteritis (41.8%) or a fever of unknown origin (33.3%). S. typhimurium was very sensitive to amikacin and cefotaxime, but resistant to ampicillin and sulfamethoxazole-trimethoprim. Health workers in Kenya have frequently administered ampicillin and sulfamethoxazole-trimethoprim, but not amikacin and cefotaxime. 67% of the strains of S. typhimurium were resistant to gentamicin and 33% to chloramphenicol. These results along with those of other reports from this hospital indicated a dramatic rise in Gram negative bacteria resistance to antibiotics. Therefore physicians should no longer consider gentamicin as a 1st line antibiotic in treating suspected septicemia patients.
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PMID:Aerobic and facultative bacterial isolates from blood cultures of children with clinically diagnosed septicaemia. 180 80


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