Community-acquired pneumonia caused by methicillin-resistant Staphylococcus aureus in a Chinese adult: A case report.

RATIONALE: Methicillin-resistant Staphylococcus aureus (MRSA) has been established as an important cause of severe community-acquired pneumonia (CAP) with very high mortality. Panton-Valentine leukocidin (PVL) producing MRSA has been reported to be associated with necrotizing pneumonia and worse outcome. The incidence of community-acquired MRSA (CA-MRSA) pneumonia is very low, as only a few CA-MRSA pneumonia cases were reported in the last few years. We present a case of severe CAP caused by PVL-positive MRSA with ensuing septic shock. PATIENT CONCERNS: A 68-year-old male with no concerning medical history had developed a fever that reached 39.0°C, a productive cough that was sustained for 5 days, and hypodynamia. He was treated with azithromycin and alexipyretic in a nearby clinic for 2 days in which the symptoms were alleviated. However, 1 day later, the symptoms worsened, and he was taken to a local Chinese medicine hospital for traditional medicine treatment. However, his clinical condition deteriorated rapidly, and he then developed dyspnea and hemoptysis. DIAGNOSIS: CA-MRSA pneumonia and septic shock. The sputum culture showed MRSA. Polymerase chain reaction of MRSA isolates was positive for PVL genes. INTERVENTIONS: Mechanical ventilation, fluid resuscitation, and antibiotic therapy were performed. Antibiotic therapy included mezlocillin sodium/sulbactam sodium, linezolid, and oseltamivir. OUTCOMES: He died after 12 hours of treatment. LESSONS: This is a report of severe pneumonia due to PVL-positive CA-MRSA in a healthy adult. CA-MRSA should be considered a pathogen of severe CAP, especially when combined with septic shock in previously healthy individuals.

Effects of prophylactic antibiotic therapy with mezlocillin plus sulbactam on the incidence and height of fever after severe acute ischemic stroke: the Mannheim infection in stroke study (MISS).

BACKGROUND AND PURPOSE: Fever after stroke is a strong predictor for a negative outcome with infections as the most common cause. The aim of this pilot study was to evaluate the effects of prophylactic antibiotic therapy on the incidence and height of fever after acute ischemic stroke. METHODS: This is a randomized, controlled study of antibiotic prophylaxis in patients with ischemic stroke enrolled within 24 hours from clinical onset who presented bedridden (modified Rankin score >3) with no significant infection. Interventions included prophylactic mezlocillin plus sulbactam (3 x 2 g/1 g for 4 days) or conventional management. Over 10 days, body temperature was continuously monitored, and the presence of infection was daily assessed. Primary end points were incidence and height of fever; secondary end points included rate of infection and clinical outcome. RESULTS: Sixty patients were included (mean, 75 years; median National Institutes of Health Stroke Scale score, 16). Over the first 3 days, patients in the intervention group showed lower mean body temperatures as well as lower daily peak temperatures (P<0.05). Throughout the observation period, 15 of 30 patients in the intervention group but 27 of 30 patients in the conventionally treated group developed an infection (P<0.05). Mean interval until the diagnosis of infection was 5.1 days in the intervention group and 3.3 days in the control group (P<0.05). Clinical outcome was more favorable in patients with prophylactic therapy (P=0.01). CONCLUSIONS: In patients with acute severe stroke, prophylactic administration of mezlocillin plus sulbactam over 4 days decreases body temperature, lowers the rate of infection, and may be associated with a better clinical outcome.

Antibiotic therapy for preterm premature rupture of membranes - results of a multicenter study.

AIMS: To evaluate whether primary application of mezlozillin in preterm premature rupture of membranes (pPROM) prolongs pregnancy and lowers neonatal morbidity. METHODS: In this prospective, randomized, double blind, placebo-controlled multicenter study a total of 105 pregnant women with pPROM between 24 + 0 and 32 + 6 weeks of gestation were examined receiving i.v. injections of corticoids and tocolytics as well as mezlocillin (3 x 2 g/d) or placebo. Assessed factors were prolongation of pregnancy and neonatal morbidity such as neonatal infection, respiratory distress syndrome (RDS), intraventricular hemorrhage (IVH) and necrotizing enterocolitis (NEC). RESULTS: Prolongation of pregnancy by more than 7 days was achieved in 63.8% of the mezlocillin group versus 44.8% of the placebo group (P < 0.05). The babies of mothers treated with anibiotics had fewer neonatal infections, RDS, IVH and NEC. Total morbidity was significantly lowered in the verum group (P = 0.02). CONCLUSIONS: Antibiotic administration following preterm premature rupture of membranes is associated with a prolongation of pregnancy and a reduction of neonatal infectious morbidity.

[Analysis of prophylactic antibiotics for cesarean section].

OBJECTIVE: To study the appropriate antibiotic for prophylactic use in cesarean section. METHODS: The effects and side effects of prophylatic antibiotics in 1 266 cesarean section were studied retrospectively. Six regiems were engaged: (1) Penicillin and Ampicillin; (2) Mezlocillin sodium; (3) Sulbactam and Ampicillin; (4) Ciprofloxacin; (5) Clindamycin; (6) Cefacidal. RESULTS: The duration of postoperative body temperature return to normal of 1 - 6 group is (54.0 +/- 28.4) hours, (48.9 +/- 27.8) hours, (49.9 +/- 23.9) hours, (58.6 +/- 33.7) hours, (52.5 +/- 25.2) hours, (63.1 +/- 51.1) hours respectively. It was longer in cefazolin group than the others. There were less puerperal morbidity and side effects of Mezlocillin. CONCLUSIONS: Penicillin and Ampicillin are still the most common choices as prophylatic antibiotic in cesarean section. Mezlocillin is appropriate as well.

Efficacy of oral ofloxacin for single-dose perioperative prophylaxis in general surgery--a controlled randomized clinical study.

BACKGROUND: Perioperative antibiotic prophylaxis surely reduces surgical infection rate. Pharmacokinetic data of oral ofloxacin in combination with its antibacterial spectrum suggest effective protection against perioperative infection. In addition, costs, adverse effects, and induction of microbial resistance are low. Therefore we performed a controlled randomized study comparing oral and intravenous single dose prophylaxis. METHODS: A total of 61 patients undergoing colonic or pancreatic resection randomly received either a single dose standard intravenous prophylaxis or ofloxacin 400 mg and metronidazole 500 mg orally 2 h before surgery. Postoperative infections were recorded for 3 weeks. RESULTS: Groups were very well comparable regarding age, overweight, concomitant disease, type and duration of surgery, blood loss, and volume support. Infectious complications occurred in 14.8% after parenteral and 3.3% after enteral antibiotic prophylaxis. There was no difference in post-operative hospital stay. CONCLUSION: The data demonstrate that single-dose oral ofloxacin is at least as effective as a standard intravenous prophylaxis in patients with colonic or pancreatic resection. It offers significant advantages regarding costs and ease of administration.

Pharmacokinetic basis for oral perioperative prophylaxis with ofloxacin in general surgery.

BACKGROUND: Perioperative prophylaxis is recommended to be administered intravenously which, compared to oral prophylaxis, is more expensive. However, pharmacokinetic data on oral perioperative prophylaxis in patients with preoperative surgical and anesthesiological preparation are not available. PATIENTS AND METHODS: 40 patients with open hernial repair or cholecystectomy (low-risk group), colonic or pancreatic resection (high-risk group) received a standard single-dose perioperative prophylaxis with 4.5 g mezlocillin and 0.5 g metronidazole intravenously in addition to 400 mg ofloxacin orally 2 h prior to surgery. Antibiotic concentrations were measured perioperatively and pharmacokinetic data calculated. RESULTS: Serum and tissue concentrations of ofloxacin were above the MIC90 of the potential bacterial spectrum for surgical infection throughout the entire operation. Pharmacokinetic data were not influenced by preoperative surgical or anesthesiological preparation. CONCLUSION: Tissue and serum concentrations and the antibacterial spectrum of orally administered ofloxacin suggest effective protection against perioperative infection. Pharmacokinetic data confirm that oral ofloxacin may be used effectively as single-dose perioperative antibiotic prophylaxis. Since there are no clinical data comparing oral and intravenous singLe-dose prophylaxis, a prospective randomized clinical trial should be performed.

Treatment of accidental high dose intraventricular mezlocillin application by cerebrospinal fluid exchange.

An accidental high dose of intraventricular mezlocillin was given during antibiotic treatment for pneumonia in a patient admitted because of severe traumatic brain injury and occlusive hydrocephalus. Because of serial epileptic seizures not responsive to antiepileptic drug treatment, CSF exchange was performed. The CSF was drained through a ventricular catheter, while mock CSF was infused into the lumbar subarachnoid space. The patient soon recovered to her clinical status previous to intraventricular mezlocillin application. Side effects of CSF exchange were not seen. Under continued antiepileptic medication no more seizures occurred. It is concluded that high doses of intraventricular mezlocillin have proconvulsive effects. In this patient CSF exchange was a suitable means of preventing putatively permanent impairment of brain function caused by serial epileptic seizures due to intraventricular mezlocillin application.

A prospective randomized trial of ceftazidime versus netilmicin plus mezlocillin in the empirical therapy of presumed sepsis in cirrhotic patients.

Aminoglycosides are frequently used to treat sepsis in patients with liver disease. However, it has been suggested that cirrhotic patients are particularly sensitive to aminoglycoside-induced renal dysfunction. We investigated the efficacy and incidence of renal impairment with netilmicin plus mezlocillin compared with ceftazidime in 128 cirrhotic patients who required empirical treatment for sepsis. Renal impairment developed in 8 of 63 (13%) patients receiving netilmicin compared with 2 of 65 (3%) patients receiving ceftazidime (P < .05); it occurred despite regular monitoring of trough netilmicin levels. Renal impairment was present at the time of death in 1 of 13 (8%) patients treated with ceftazidime compared with 5 of 9 (56%) of the netilmicin patients (P < .05). Mortality rates were similar in the two groups (ceftazidime 20%, aminoglycoside 14%; P = NS). Renal dysfunction is significantly more frequent in cirrhotic patients treated with netilmicin but with careful attention to dosage and fluid management the clinical effect is likely to be relatively modest.

[Antibiotic prophylaxis with mezlocillin in elective biliary surgery]. / Profilassi antibiotica con mezlocillina in chirurgia biliare elettiva.

The authors report their experience of antibiotic prophylaxis in elective biliary surgery pertinent to 246 operated patients treated with short-term prophylaxis with mezlocillin. This method has turned out to be efficacious in reducing postoperative infections incidence, particularly in simple cholecystectomy. Therefore the authors advise using such a procedure in this frequent operation too.

[Surgical revision of the pilonidal sinus with single shot antibiosis]. / Die operative Sanierung des Sinus pilonidalis unter Single-shot-Antibiose.

For a therapy of the pilonidal sinus there are different surgical and non-surgical methods to be found in literature. In our surgical wing 140 male patients have been operated on this disease from September 1990 to July 1992. 16 cases out of these 140 were re-operations. Using a special surgical technique we applied the excision with a primary closure under single-shot antibiosis in 139 cases. By modifying this antibiosis prophylaxis we could reach a primary success healing rate of up to 96%. A retrospective study among our patients showed a recurrence rate of 5%.

[Validation trial of a neonatal prophylactic antibiotic protocol in the delivery room]. / Essai de validation d'un protocole d'antibioprophylaxie néonatale en salle de travail.

Maternofetal infection occurs in 1 to 10 of every 1,000 newborns. Prognosis is poor and an extremely rapid the clinical course is sometimes observed. The situation suggests that widespread use of antibiotics and more than 90% of the newborns receiving antibiotics are not infected. A prospective study based on simple, recognized criteria predictive of maternal-fetal infection was conducted in 3,392 deliveries to evaluate the effect of an antibiotic prophylaxy protocol. Specificity, sensitivity, positive and negative predictive value were evaluated for each of the eleven criteria retained with the goal of increasing sensitivity and decrease the use of unnecessary antibiotics. Among the 3,392 infants delivered from January 1989 to December 1990, 286 (8.4%) newborns entered the study and were given mezlocillin (150 mg/kg/12 h). This treatment was stopped at 48 hours of life if the infant was not infected. RESULTS. Infection was confirmed in 48 of 3,392 infants (1.4%). All were in the risk group: 48/286 (16.7%). The germs the most often found were group B Streptococcus (n = 16), Escherichia coli (n = 8) and Listeria monocytogenes (n = 3). Nine criteria were well correlated with maternal-fetal infection. The two most important criteria were maternal pyrexia above 39 degrees C and Apgar score below 7 to 5 min (poor neonatal adaptation), with a 99% and 90% and a positive predictive value of 80% and 37% respectively. Inversely, Two criteria were poorly correlated with maternal-fetal infection: labour duration above 12 hours and instrumental extraction (positive predictive value from 10% to 17%).(ABSTRACT TRUNCATED AT 250 WORDS)

Single-dose antibiotic prophylaxis in maxillofacial surgery.

The clinical efficacy of short-term antimicrobial prophylaxis with either one shot of ceftriaxone (1 g) or a course of 3 injections of a fixed combination of mezlocillin (2 g) and oxacillin (1 g) administered over 24 h was studied in a prospective randomized clinical study of 100 patients undergoing elective maxillofacial surgery. Tissue and plasma concentrations of the antibiotics were determined by high-pressure liquid chromatography in 6 tumor surgery patients from each treatment group. Statistical analysis showed the treatment group to be comparable both demographically and with respect to the types of surgery performed and the durations of the procedures. Only 1 patient in each group developed a postoperative wound infection. It is concluded that 1 g ceftriaxone given 30 min preoperatively meets the pharmacokinetic requirements for perioperative antimicrobial prophylaxis in maxillofacial surgery.

[Immunomodulating effects of antibiotics influencing digestive flora]. / Effets immunomodulateurs des antibiotiques influençant les flores digestives.

Mucosal surfaces are habitats of the physiological microflora and are closely related to the mucosal immune compartment (mucosa-associated lymphoid tissue, MALT). Recently, considerable evidence has been accumulated showing that various members of the physiological microflora liberate low molecular weight peptides which, apparently, are essential for adequate immune responses of the host. Antibiotic decontamination (e.g. of the BALB/c-mouse intestinal tract) results in a lack of generation of immunopriming microbial peptides leading to immunosuppression. Biochemical analysis of the peptides revealed reproducible chromatographic fractions which selectively influence maturation, proliferation, and activation of lymphatic cells.

A randomized study of cefepime versus the combination of gentamicin and mezlocillin as an adjunct to surgical treatment in patients with acute cholecystitis.

In patients with acute cholecystitis, antibiotics are used as an adjunct to cholecystectomy to reduce the incidence of postoperative septic complications thought to be related to bactibilia. Combinations of penicillins, or cephalosporins or aminoglycosides, or both, are often used. Cefepime is a fourth-generation cephalosporin with excellent activity against gram-positive and gram-negative bacteria, including Pseudomonas species. It has a prolonged serum half-life, allowing twice-daily dosing, and is not nephrotoxic. This study was undertaken to determine whether or not cefepime was as effective as the combination of gentamicin and mezlocillin in patients with acute cholecystitis. One hundred and forty-nine patients were randomized, two to one, to receive cefepime or gentamicin and mezlocillin. Cefepime was given intravenously at 2 grams every 12 hours; gentamicin, 1.0 to 1.5 milligrams per kilograms every eight hours, and mezlocillin, 3 to 4 grams every four to six hours. All patients underwent cholecystectomy. Bile cultures were obtained, and concentrations of cefepime in blood, bile, peritoneal fluid and gallbladder were determined in a subset of patients. There were 56 evaluable cefepime-treated and 34 evaluable gentamicin and mezlocillin-treated patients. Bactibilia was present in 17 of 56 cefepime-treated patients (30.4 percent) and ten of 34 gentamicin and mezlocillin-treated patients (29.4 percent). Enterococci were recovered in six cefepime-treated patients. Clinical and bacteriologic responses were similar for the cefepime-treated and gentamicin and mezlocillin-treated groups, with one failure in each group, a wound infection in a patient receiving cefepime and a subhepatic abscess in a patients receiving gentamicin and mezlocillin. Other measures of outcome, such as the number of days of fever, days nothing by mouth, days of hospitalization and days of antibiotic therapy were similar in both groups. Cefepime, with every 12 hour dosing, achieved extremely high concentrations in all tissues assayed at the time of the operation, a mean of eight hours after administration. Adverse clinical events were similar in both treatment groups. Cefepime is as effective as gentamicin and mezlocillin in preventing septic complications after cholecystectomy for acute cholecystitis. Cefepime requires fewer doses, does not require drug monitoring, is not associated with nephrotoxicity and may therefore prove to be a cost-effective alternative to combination therapy that uses an aminoglycoside.

Cefepime for infections of the biliary tract.

Antibiotic treatment of biliary tract infections is widely accepted. An open, prospective, randomized, multicenter trial comparing cefepime (2 grams every 12 hours) with gentamicin (1.5 milligrams per kilograms every eight hours) plus mezlocillin (3 grams every four hours) for a minimum of five days was undertaken. Of the 149 patients enrolled, 120 were evaluable; 80 were randomized to receive cefepime and 40 were randomized to receive gentamicin plus mezlocillin (two to one randomization schedule). The diagnosis was acute cholecystitis in 101 patients and acute cholangitis in the remainder. There were no differences between the two treatment groups with regard to gender, age, disease, signs and symptoms, admitting temperature or laboratory values. All patients (100 percent) treated with gentamicin and mezlocillin were cured of the infection, as were 78 (97.5 percent) of the patients treated with cefepime (difference not significant). The incidence and spectrum of adverse events and complications were similar between the two groups (8.8 percent for cefepime versus 10 percent for gentamicin and mezlocillin). Our data show that the efficacy and safety of cefepime administered every 12 hours is equivalent to that of gentamicin and mezlocillin combination for treating patients with acute infections of the biliary tract. In addition, twice-daily administration of cefepime may be more cost-effective than the aminoglycoside-based combination.

Injury severity dictates individualized antibiotic therapy in penetrating abdominal trauma.

Antibiotics play a crucial role in reducing the risk of postoperative infection in patients suffering penetrating abdominal trauma. The infection rate for patients with these injuries ranges from 7% to 16%. Single agents with broad-spectrum activity have proven efficacy, but dosage and duration are still controversial. A prospective, double-blinded study was performed on 102 patients randomized to receive one of three antibiotics for a total of 12 hours: cefoxitin (3 doses, 31 patients); ceftizoxime (2 doses, 36 patients); or mezlocillin (3 doses, 35 patients). Two distinct groups at risk for postoperative infection were evident depending on the severity of injury: Group A were those with no colon injury or a colon injury that could be repaired, no evidence of shock, or fewer than 3 organs injured; Group B were those requiring a colostomy, evidence of shock on presentation, or three or more organs injured. All comparisons of the patient populations receiving the different antibiotics showed the two groups to be equivalent. The mean penetrating abdominal trauma index for Group A was 8.8 and 28.2 for Group B. The overall infection rate for Group A was 10.3% and 42.3% for Group B. There was a significant increase in infection rate for all antibiotics except ceftizoxime in Group B compared with group A. The penetrating abdominal trauma index was significantly higher in all patients who developed infection for all antibiotics. In addition, if the surgical wound was closed primarily, patients with colon injuries developed wound infections 71% of the time, and those with small-bowel injuries did so 30% of the time.(ABSTRACT TRUNCATED AT 250 WORDS)

Medical treatment of chronic suppurative otitis media without cholesteatoma in children--a two-year follow-up.

A prospective long-term study was carried out in 48 infants and children with chronic suppurative otitis media without cholesteatoma treated initially with wide spectrum intravenous antibiotics and suction and debridement. Patients were followed for a period of two years. All children were cured after completion of therapy. At 3 and 6 months follow-up 75% of the children were still free of discharge and at 12, 18 and 24 months the proportion of dry ears dropped to 71%, 66% and 52%, respectively. Eighty percent of all recurrences developed already during the first 6 months of follow-up. Pseudomonas aeruginosa was the most common pathogen isolated, both in the initial and recurrent bouts of the disease, and was commonly associated with other pathogens. Children with early reappearance of ear discharge were less likely to benefit from further antimicrobial or surgical treatment. The recurrence rate was not affected by the antibiotic regimen, age, duration of drainage before treatment or the presence of granulation tissue. No intracranial or intratemporal complications were observed during the follow-up period.