Clinical resistance of Staphylococcus keratitis to ciprofloxacin monotherapy.

PURPOSE: To review the in vitro susceptibility and the clinical response to 0.3% ciprofloxacin in Staphylococcus aureus keratitis. METHODS: This is a non-comparative case series derived from a prospectively collected database and analysed retrospectively. One hundred and twenty one patients presenting in the cornea service of LV Prasad Eye Institute, Hyderabad, India, between January 1993 and December 2000, and identified to have S. aureus keratitis were included in the study. All patients had received slitlamp evaluation of the cornea and diagnostic microbiologic workup. They were treated with topical antimicrobial therapy based on smear and culture results. All S. aureus isolates were tested for antibiotic susceptibility by disk diffusion and those resistant to ciprofloxacin were confirmed by testing for minimum inhibitory concentration. The patients' clinical response to the antimicrobial therapy was noted. RESULTS: Twenty-five (20.6%) of 121 isolates resistant to ciprofloxacin on in vitro susceptibility testing were further analysed in this study. Fifteen of these 25 (60%) patients were initially treated with topical ciprofloxacin. Twelve of 15 (80%) patients showed no clinical improvement (3-8 days). Based on antibiotic susceptibility results, the antibiotic therapy was modified to fortified cefazolin and gentamicin in seven (58.3%), to vancomycin in one and to chloramphenicol in four cases. The corneal infiltrate resolved in 11 (73.3%) of 15 cases. Two patients required penetrating keratoplasty (PK), one required evisceration, and one patient was lost to follow up. Nine of 25 patients were initially started on fortified cefazolin and gentamicin therapy based on smear positive for gram-positive cocci; this resulted in resolution of infiltrate in 44.4% (4/9) while three required change of antibiotics (vancomycin-2, chloramphenicol-1), one required PK and one patient was lost to follow up. One of 25 patients started and continued on chloramphenicol, showed no response and required PK. CONCLUSIONS: This study shows a significant resistance of S. aureus to many antibiotics including ciprofloxacin and highlights the need for an alternative to ciprofloxacin monotherapy for the treatment of staphylococcal keratitis.

Treatment of appendiceal mass: prospective, randomized clinical trial.

BACKGROUND: Appendiceal mass may be treated in several ways. However, no randomized trial has been conducted to find the best option. OBJECTIVE: To compare the three most commonly used methods for treating appendiceal mass. METHODS: Over a three-year period, 60 consecutive patients with appendiceal mass were randomly allocated to three groups: Group A--initial conservative treatment followed by interval appendectomy six weeks later; Group B--appendectomy as soon as appendiceal mass resolved using conservative means; Group C--conservative treatment alone. Short-term outcome measures included operative time, operative difficulty, postoperative complications, length of hospital stay, and duration of time away from work. Long-term outcome measures were: number of hospital visits made, presence of severe incisional pain, scar appearance, and patients with recurrent appendicitis. RESULTS: Baseline characteristics were comparable in the three groups. In patients in Group A, operative time was less, adhesions were encountered less frequently, the incision had to be extended less often and post-operative complications were fewer, as compared to Group B. Patients in Group C had the shortest hospital stay and duration of work-days lost; only 2 of 20 patients in this group developed recurrent appendicitis during a follow-up period of 24-52 (median 33.5) months. CONCLUSION: Of the three treatment modalities compared, conservative treatment without subsequent appendectomy appears to be the best.

Toxic shock syndrome.

The authors present two children who had fever >or=38.9 degree C, diffuse rash, hypotension, deranged renal and hepatic functions, disseminated intravascular coagulation, altered sensorium and inflamed oral mucosa. They responded to fluids, inotropes, antibiotics and intravenous immunoglobulin (2 g/kg). Desquamation particularly of palms and soles and periungal region was noted 1 to 2 weeks after onset of illness. These features were consistent with the diagnosis of staphylococcal toxic shock syndrome (TSS). The cases highlight that TSS is very much with us and can mimic a variety of other diseases. Early recognition, and aggressive antimicrobial supportive and IVIG therapy cover can ensure complete recovery.

Streptococcus pyogenes meningitis.

Group A Streptococcus (GAS) is a rare cause of meningitis. Although it has a high mortality, the condition is easily treatable if diagnosed early since the bacteria retains its sensitivity to many antimicrobials. The authors report here two cases of GAS meningitis along with a review of world literature.

Case report: Brucellosis: a re-emerging disease in Thailand.

Brucellosis is a zoonotic disease prevalent in many countries, but it has been reported only once in Thailand, 36 years ago. We describe here two consecutive cases of brucellosis in Bangkok, Thailand. Both cases presented with prolonged fever and weight loss. Blood cultures taken from 2 patients yielded Brucella melitensis. The slide agglutination test of blood samples were also positive, with a titer of 1:64 for antibodies to Brucella. The first patient responded to a combination of doxycycline, gentamicin, and ciprofloxacin; the other responded to doxycycline and rifampicin. Brucellosis is a potential public health threat, therefore, preventive measures should be actively implemented. This clinical syndrome should be included in the differential diagnosis of patients presenting with prolonged fever, particularly those with contact to animals which could serve as reservoirs.

Infective endocarditis due to Salmonella typhi--a case report.

Endocarditis is a rare complication of typhoid fever. We report a case in which Salmonella enterica serotype typhi was isolated from a case of endocarditis. The isolate was resistant to ampicillin, chloramphenicol and ciprofloxacin but sensitive to ceftriaxone, amikacin and gentamicin.

Interface keratitis due to Mycobacterium fortuitum following laser in situ keratomileusis.

A case of unilateral interface keratitis due to Mycobacterium fortuitum following simultaneous bilateral LASIK procedure for low myopia is reported. Excimer phototherapeutic keratectomy was performed to the stromal bed to reduce the infective load. Intensive topical therapy with topical amikacin and ciprofloxacin resulted in resolution of the keratitis.

Rapidly growing mycobacterial infections: spectrum of diseases, antimicrobial susceptibility, pathology and treatment outcomes.

OBJECTIVES: A series of cases infected with rapidly growing mycobacteria were studied to reveal the spectrum of disease, antimicrobial susceptibility, pathology, and treatment outcomes. METHOD: The cases identified as rapidly growing mycobacterial infections in Ramathibodi Hospital from January 1993 to June 1999 were retrospectively studied. RESULTS: There were 20 patients and most of the cases had no underlying disease. Only two cases were HIV-infected patients. The presenting clinical features were lymphadenitis (7), skin and subcutaneous abscess (7), eye infection (4), pulmonary infection (1), and chronic otitis media (1). Four of the seven cases with lymphadenitis had Sweet's syndrome. The organisms were Mycobacterium chelonae/abscessus group (17 cases) and Mycobacteriumfortuitum group (3 cases). The organisms were susceptible to amikacin, netilmicin and imipenem. The M. fortuitum group was susceptible to more antibiotics than the M. chelonaelabscessus group. Pathology of the infected tissue varied from non-specific findings to suppurative or caseous granuloma. The clinical responses corresponded to the antimicrobial susceptibility. Most of the patients had a good clinical outcome. A combination of two or more drugs was used for the medical treatment. Surgical resection was performed where possible to reduce the load of the organism, especially in cases with very resistant organisms. CONCLUSIONS: Rapidly growing mycobacterial infections can occur in apparently normal hosts. Clinical syndrome is variable. The pathology is non-specific and culture is needed for definite diagnosis. Clinical responses varied but seemed to correlate with the in vitro susceptibility result. More studies are needed before one can deal with these infections more effectively.

Brucella isolated from bone marrow.

A 40 year patient presented with pyrexia of one month duration. Routine work up for fever of unknown origin (FUO) was negative. Bone marrow aspiration and culture done yielded Brucella. Bone marrow cultures are recommended for patients for FUO for whom the routine workup turns out to be negative. Serological tests for brucellosis can be false-negative in some cases of brucellosis due to prozone phenomena.

Quadruple therapy for initial eradication of Helicobacter pylori in peptic ulcer: comparison with triple therapy.

BACKGROUND: Quadruple therapy appears to be more effective than standard triple therapy in the management of patients with Helicobacter pylori infection who harbor drug-resistant organisms. No data are available on the relative efficacies of triple and quadruple drug regimens from India. METHODS: Consecutive patients with peptic ulcer and H. pylori infection were randomized to receive lansoprazole 30 mg twice daily along with either amoxycillin (500 mg four times daily) and clarithromycin (500 mg twice a day) (Group A), or tri-potassium dicitrato bismuthate (120 mg four times daily), metronidazole (400 mg thrice daily) and tetracycline (500 mg 4 times daily) (Group B) for 10 days. Presence of H. pylori infection was looked for using an in-house urease test and histology before starting treatment, and 30 days after completion of treatment. RESULTS: Twenty-nine of 35 patients in Group A and 24 of 33 in Group B had eradication of infection (82.8% and 72.7% by intention-to-treat analysis, and 87.9% and 85.7% by per protocol analysis, respectively; p = ns). Side-effects occurred in 4 (12%) and 5 (18%) patients in Groups A and B, respectively (p = ns); discontinuation of drugs was required in two patients in group B. CONCLUSIONS: Quadruple therapy for initial treatment of H. pylori infection does not offer any advantage over standard triple therapy in Indian patients.

Late spontaneous extrusion of a wooden intraorbital foreign body.

Wooden intraorbital foreign body is characteristic for delayed manifestation, silent progression and unpredictable outcome. A silent wooden intraorbital foreign body is difficult to diagnose clinically. Spontaneous expulsion of entire foreign body is rare.

Role of prophylactic intravitreal antibiotics in open globe injuries.

PURPOSE: To determine the efficacy of prophylactic intravitreal antibiotics in reducing the incidence of endophthalmitis after trauma. METHODS: This was a prospective, randomised, case control study of 70 consecutive patients with open globe injury. The patients were prospectively randomised into group I (32 eyes) and group II (38 eyes). Group I patients were given prophylactic intravitreal injection of vancomycin 1 mg and ceftazidime 2.25 mg at the conclusion of primary repair. Group II patients were not given prophylactic intravitreal antibiotics. All the patients received intravenous ciprofloxacin. RESULTS: The incidence of endophthalmitis was higher in group II (7 of 38 eyes; 18.42%) compared to group I (2 of 32 eyes; 6.25%). Both the patients who developed endophthalmitis despite prophylactic intravitreal antibiotics in group I had an initially undetected intraocular foreign body (eyelash) in the vitreous cavity. CONCLUSIONS: Prophylactic intravitreal broad spectrum antibiotic injection decreases the risk of post-traumatic endophthalmitis.

Uncommon manifestations of shunt infection.

Shunt infection is one of the commonest and most troublesome cause of shunt failure. According to the etiology and clinical presentations it has been divided into external and internal types. METHOD: We hereby present four pediatric cases, who presented with atypical manifestations not coinciding with the above mentioned types of shunt infection. Three patients developed round, globular or diffuse fluctuant CSF filled swellings at the burr hole site, one of whom had involvement of the entire pericatheteral extent upto the abdomen. RESULT: The fourth child developed spontaneous expulsion of ventricular end of shunt tube through the dehiscent and infected chest wall incision site. CONCLUSION: First three of the above children were diagnosed as having internal type of shunt infections, while the fourth had mixed manifestations of external and internal type.

Melioidosis--a report from Pondicherry, South India.

Melioidosis is an acute infectious disease caused by a safety-pin-shaped gram-negative bacteria called Burkholderia pseudomallei. Here, we report the first case of melioidosis in a middle aged male agricultural worker, from Pondicherry. The isolation of this organism from subcutaneous nodules on the extensor aspect of his limbs underlines the diversity of its clinical presentation. Difficulty in identifying the organism which mimics any other non-fementing gram-negative bacilli (NFGNB) on cursory examination, highlights the importance of identification of NFGNB in endemic areas for specific treatment and prevention.

Respiratory distress in neonates with special reference to pneumonia.

OBJECTIVE: (i) To find causes of respiratory distress in neonates brought to a referral neonatal unit with symptoms suggestive of respiratory disorder; (ii) to evaluate clinical signs for diagnosis of neonatal pneumonia; (iii) To determine bacterial etiology of neonatal pneumonia; and (iv) To determine indicators of fatality in neonatal pneumonia. DESIGN: Prospective descriptive. SETTING: Referral neonatal unit of a teaching hospital. SUBJECTS: 150 neonates admitted with respiratory symptoms consecutively. METHODS: All neonates presenting with respiratory symptoms were included in the study. The diagnosis of the cause of respiratory distress was based on guidelines recommended by the National Neonatology Forum. Clinical features, FiO2 requirement, sepsis screen, X-ray chest, blood culture and antibiotic sensitivity, arterial blood gases and other relevant investigations were documented in a structured proforma. The neonates were regularly followed up for outcome. Multivariate unweighted logistic regression was done to find out the indicators of fatality in neonatal pneumonia for those variables which were significantly associated with outcome on univariate analysis. RESULTS: Pneumonia was found to be the most common cause (68.6%) of respiratory distress in neonates. Other conditions included hydline membrane disease (HMD), transient tachypneia of new born (TTNB), birth asphyxia with hypoxic ischemic encephalopathy (HIE) and meconium aspiration syndrome (MAS). Clinical signs and symptoms were non specific and did not differentiate between pneumonia and other causes of respiratory distress. Respiratory rate was less than 60 per minute in 11.6% neonates with pneumonia. The most common organism responsible for neonatal pneumonia was Klebsiella pneumoniae. Chest X-ray was clear in 15% of neonates with pneumonia. On univariate analysis weight < 2000 g, gestation age < 34 weeks, age at presentation < 72 hours, lethargy, absent neonatal reflexes, shock, positive C-reactive protein, positive ventilatory support, blood culture positivity, Silverman Score >3, FiO2 >40%, pH < 7.2, alveolar arterial gradient (AaDO2) > 250 mmHg and arterial alveolar tension ratio (a/A) of < 0.25 were significantly associated with mortality in neonates with pneumonia. However, on multivariate analysis, only AaDO2 of > 250 mmHg was found to be independent predictor of fatality in neonatal pneumonia. CONCLUSION: Pneumonia was the most common cause of respiratory distress in neonates. Clinical features and X-ray chest missed the diagnosis of pneumonia in 15 cases and had to be corroborated with sepsis screen and blood culture. AaDO2 > 250 mmHg was an independent predictor of fatality in neonatal pneumonia

Salmonella neck abscess.

Salmonella neck abscesses have rarely been reported in the world literature. Two patients with underlying diabetes mellitus developed deep neck abscesses which did not respond to empirical antimicrobials. Diagnosis of salmonella infection was made by culture of the discharge. Successful treatment was obtained by prescribing appropriate antibiotics and proper drainage.

Retrospective analysis of typhoid fever in a tropical tertiary health facility.

A retrospective analysis of cases diagnosed as typhoid fever over a ten-year period at the University College Hospital, Ibadan, Nigeria was carried out to assess the presentation pattern, laboratory investigation, mortality and mode of therapy. Incidence was of typhoid fever was highest in the dry months of the year. The mean age of survivors and the dead are 25.7 and 21.9 years respectively. Most of the patients presented with fever, abdominal pains and other gastrointestinal symptoms such as vomiting, constipation and diarrhoea. There was no specific temperature pattern but pulse rate > or = 120/minute was significantly associated with mortality. The commonest complication was intestinal perforation followed by haemorrhage with septic shock playing a prominent role in mortality. Mortality rate of 22.2% was recorded which is not significantly different from the 24% recorded at the same centre over three decades ago and most of them died within nine days of admission with 50% dying within 3 days. Most patients were scantily investigated with poor yield on blood, stool and urine cultures. Widal's test was not a favoured investigation and was not helpful in diagnosis. Chloramphenicol was the drug of choice as monotherapy, while metronidazole and gentamicin were used in cases of gut perforation. It is concluded that typhoid fever is still a major health concern in the tropics and efforts need to be geared up to combat this preventable scourge by improvement in basic necessities of life such as potable water, hygienic food in addition to health education.