The efficacy of two formulations, wettable powder and emulsifiable concentrate, of cyfluthrin sprayed on plywood [10 mg (ai)/m2] was assessed against six species of mosquitos. The bioassay followed the WHO standard method, with some modification for the bioassay of insecticidal deposits on wall surfaces. The results indicated that these two formulations of cyfluthrin were effective against Anopheles dirus and Mansonia uniformis, moderately toxic to Aedes aegypti and Ae. albopictus in decreasing mortality through out the study period. It was least effective against Culex quinquefasciatus and An. maculatus, respectively. There was no statistically significant difference between these two formulations.
A serological investigation for human T cell leukemia virus I (HTLV-I) infection was carried out at the University Hospital, Kuala Lumpur. A total of 626 sera from a non-patient population and 1,038 sera from unselected in-patients were screened for HTLV-I antibodies using an enzyme-linked immunosorbent assay (ELISA). 27/1664 (1.6%) were found to be reactive. However, on Western blotting, only 2 sera were confirmed positive, both showing reactions for the major core (p19 and p24) and the envelope (gp46) proteins. Both of the serum samples were from unselected hospital patients. Most of the remaining sera which were reactive on screening showed indeterminate results on Western blotting. These were further tested by radioimmunoprecipitation assay (RIPA) and none of these sera gave a positive reaction. Therefore, only 2/1038 (0.19%) unselected patients could be confirmed to have antibodies to HTLV-I. None of the normal individuals screened showed a positive Western blot result. Our data indicate that HTLV-I infection is present in our population, but at a low prevalence rate.
The study was done to assess the efficacy of danazol in the treatment of infertile patients with all stages of endometriosis. The cumulative pregnancy rates in 21 patients with Stage I and II endometriosis were compared to 21 patients with Stage III and IV endometriosis. Both groups had danazol treatment for six months. All other fertility related factors were controlled for in both groups. There was a cumulative pregnancy rate of 11% (standard error 7%) at 12 months of follow-up in the group with Stage I and II disease whilst it was 26% (standard error 10%) in the group with moderate or severe disease. These results question the validity of any classification system in prognosticating for fertility in patients with endometriosis.
Three building complexes in Kuala Lumpur were surveyed for the presence of legionellae in cooling towers. The organisms were grown from 12 out of 46 samples of water collected from 30 towers. L. pneumophila serogroups 1 and 7 were the commonest serogroups isolated. None belonged to the Pontiac subgroup of L. pneumophila serogroup 1.
MeSH terms: Legionella/isolation & purification*; Malaysia; Water Microbiology*
Spinal anaesthesia was performed on 101 patients with a 25-Gauge (0.52 mm) needle. We found a 13.9% overall incidence of postdural puncture headache (PDPH) in an orthopaedic population whose mean age was 33.6 years. This incidence is too high and an alternative technique may be needed.
The effectiveness of sodium citrate and sodium citrate/ranitidine were compared in two randomised groups of elective caesarean patients during the various phases of anaesthesia. The mean pH values (3.5, 3.3, 3.6) were lower in the citrate group compared to the citrate/ranitidine group (6.1, 6.3, 5.9). The percentage of patients with pH values less than 2.5 was 40% in the citrate group compared to 7% in the citrate/ranitidine group. Sodium citrate alone is less effective than sodium citrate/ranitidine for acid aspiration prophylaxis.
Anaesthetic experience of the first nine patients in Singapore who underwent closed embolisation of cerebral arteriovenous malformations is reported. Six patients had neurolept analgesia and three had general anaesthesia.
Cytohormonal evaluation was done on the vaginal smears of 480 normal, asymptomatic, post-menopausal women whose ages ranged from 36 to 74 years. About 50% showed atrophic smears consistent with total oestrogen lack. 41% had mild to moderately proliferative smears compatible with sub-optimal oestrogen stimulus. 9% showed a highly proliferative pattern typical of unopposed oestrogen effect and in this group two women had atypical endometrial cells in their smears, which subsequently were found to come from an atypical endometrial hyperplasia and an endometrial adenocarcinoma-in-situ. The clinical relevance of cytohormonal studies in post-menopausal women is briefly discussed.
Vaginal discharge is a common complaint of women attending gynaecological clinics. The purpose of this study was to compare the occurrence of commonly implicated microorganisms in vaginal discharge amongst women with or without the complaint, attending a gynaecological and family planning clinic. The association of Gardnerella vaginalis with bacterial vaginosis was also studied. It was found that there were no significant differences between the cases and controls in the isolation rate of Gardnerella vaginalis, Torulopsis glabrata, Ureaplasma urealyticum, Mycoplasma ssp and Group B streptococcus (p greater than 0.05). Only the isolation rate of Candida albicans was significantly higher in the cases than controls (p less than 0.01). However, there was a significant association of G. vaginalis with bacterial vaginosis.
For a complete overall rehabilitation of cleft palate patients a multi-disciplinary approach should be adopted. Plastic and Head and Neck Surgeons in whom most of the treatment are entrusted should be concerned not only at achieving palatal function and cosmetic acceptability but also the various other problems associated with cleft palate especially hearing loss. In this study, 66 patients with repaired and unrepaired cleft palates were examined for the presence of hearing loss due to middle ear effusion. The incidence of middle ear effusion was high (57.6%). It was also found that only eight of these patients (12.1%) ever complained of hearing loss or any associated symptoms and repair of the cleft palate did not influence the incidence of middle ear effusion. As such, screening should be done in all cleft palates and otolaryngologists should therefore play an important role in the multi-disciplinary team which should comprise the paediatrician, plastic surgeon, speech therapist, orthodontist and dental specialist.
MeSH terms: Child; Child, Preschool; Cleft Palate/complications*; Female; Humans; Infant; Male; Otitis Media with Effusion/etiology*; Otitis Media with Effusion/epidemiology; Otitis Media with Effusion/therapy; Incidence
A prospective study was carried out in the Maternity Hospital, Kuala Lumpur in 1989 to determine the morbidity and mortality of infants of diabetic mothers. Out of 24,856 neonates born during the study period, 54 neonates (2.2 per 1000 livebirths) were born to mothers who were diagnosed to have diabetes mellitus before the current pregnancy or who had impaired glucose tolerance test during the current pregnancy. Almost a third (29.6 percent) of these infants of diabetic mothers had birthweight of 4000 grams and above, and 37.0 percent of the 54 babies were large-for-gestational age. Hypoglycemia occurred in 9/54 (16.7 percent) of the neonates, respiratory distress syndrome in 5/54 (9.3 percent), shoulder dystocia in 7/54 (13.0 percent), and congenital abnormalities in 4/54 (7.4 percent). Three (5.6 percent) neonates died during the neonatal period. The results of this study suggest a need to intensify control of maternal diabetes mellitus during pregnancy in order to reduce the rates of morbidity and mortality of their infants.
A retrospective study of 54 neonates with Meconium Aspiration Syndrome (MAS) admitted to the Paediatric ICU Penang General Hospital from January 1989-December 1990 was carried out to determine if suction of the trachea at birth was performed in this group of patients. 63% were inborn and 27% outborn. The mean birth weight was 3.2 kg, 83% were ventilated, mean duration of ventilation was five days and the mortality was 24%. 63% had an Apgar Score of less than 5 at 1 min and 65% had thick meconium-stained liquor. Only 48% were intubated and suctioned at birth. Overall tracheal suction rate was low.
Modified subtotal cholecystectomy involves removal of the gall bladder after circumferential division of the neck. Either the impacted stone or the surgeons finger was used as a guide to identify the neck. The stump cavity in the neck is obliterated with interrupted sutures to prevent recurrent stone formation. Indications for this procedure are obscure anatomy, due either to the severe inflammation in acute cholecystitis or dense adhesions in the small fibrosed gall bladder. The decision to perform modified subtotal cholecystectomy is taken during the operation. Forty three patients (14%) underwent this procedure during the period between August 85 and April 90. Out of 289 cholecystectomies performed seven were emergency and thirty-six were early cholecystectomies. With the increasing trend towards urgent and early cholecystectomy in acute cholecystitis the author has found this to be a safe and definitive procedure.
To assess the prevalence of skin test sensitivity among asthmatic patients in Malaysia, skin prick tests for allergy in 134 adult asthmatic patients and 120 control subjects were done. 90% of asthmatic patients had positive skin test to at least one allergens as compared to 78% of the controls. House dust mite was the most frequent allergen to which the subjects had positive reactions. Sixty-four percent of the asthmatic patients had associated rhinitis. There was no significant difference in the skin test sensitivity between asthmatic patients with associated rhinitis and those without.
We report a case of total occlusion of the left main coronary artery (LMCA) in a patient with chronic, stable angina. Total occlusion of the LMCA is rare and survival depends on the existence of collateral circulation. In LMCA disease, there is usually also disease in other parts of the coronary arterial tree.
Whenever possible Mitral valve repair should be performed instead of Mitral valve replacement. It is important to assess the adequacy of the repair during the operation so that any corrective steps may be taken immediately. We present three cases of Mitral valve repair in which the intraoperative TEE was used to assess the adequacy of the repair. There was good correlation of the immediate post bypass TEE findings and early post operative transthoracic echocardiographic findings. Intraoperative TEE is a useful tool in the early assessment of Mitral Valve Repair.