http://dspace.cas.upm.edu.ph:8080/xmlui/handle/123456789/3 Sat, 13 Jun 2026 03:15:45 GMT 2026-06-13T03:15:45Z http://dspace.cas.upm.edu.ph:80/xmlui/bitstream/id/1488d26a-477b-463b-b8e8-03768c467b80/biology logo.jpg http://dspace.cas.upm.edu.ph:8080/xmlui/handle/123456789/3 http://dspace.cas.upm.edu.ph:8080/xmlui/handle/123456789/3745 Antibacterial Effects of Tamarindus Indica (Sampalok) Carica Papaya (Papaya), and Averrhoa Bilimbi (Kamias) Fruit Substances on Pseudomonas aeruginosa and Staphylococcus aureus Borja, Joaquin Peter S. Fruit substances derived from Tamarindus indica, Carica papaya, and Averrhoa bilimbi were tested for inhibitory effects on the growth of Pseudomonas aeruginosa and Staphylococcus aureus, both of these bacteria cause skin infections. Positive results were obtained from Tamarindus indica, against both types of bacteria; and Averrhoa bilimbi, against Ps. Aeruginosa. The Agar Disc Diffusion Method was used to test the susceptibility of the bacteria to the fruit substances. The incubation period of bacterial cultures was 24 hrs, under the temperature of 37 degrees centigrade. Sat, 01 Jun 1991 00:00:00 GMT http://dspace.cas.upm.edu.ph:8080/xmlui/handle/123456789/3745 1991-06-01T00:00:00Z http://dspace.cas.upm.edu.ph:8080/xmlui/handle/123456789/3744 A Survey of Cestodes in the Gut and Liver of Rats (Rattus sp.) in Metro Manila Cabazor, Ma. Fareeda A. Three rats come from a supermarket in Makati, one from a residential area in Tondo and the last from a residential area in Caloocan City, are obtained from pest control companies, sacrificed and dissected. Cestodes are collected from the liver (metascestode) and from the gastrointestinal tract of each rat. The cestodes are then identified and counted (when possible). The following parasites are found in the rats: Taenia taeniaeforais (strobilocercus), Raillientina garrisoni and Hymenolepis diminute. All are transmissible to man. In consideration of the demonstrated presence of the cestodes in the rats, the high biotic potential of the worms, the close proximity of rats to man and the high risk of infection of man by the parasites, the following measures are recommended: increased efforts at rodent control, personal hygiene and community sanitation, and proper processing and cooking of food. Fri, 01 Mar 1991 00:00:00 GMT http://dspace.cas.upm.edu.ph:8080/xmlui/handle/123456789/3744 1991-03-01T00:00:00Z http://dspace.cas.upm.edu.ph:8080/xmlui/handle/123456789/3743 The Influence of L-Ascorbic Acid on the Possible Repression of B-Lactamase Synthesis and Function Studied in Ampicillin-Induced Resistance of Haemophilus influenzae Cacho, Richard Ronald B. An induced B-lactamase mediated resistance was investigated in meningitis-causing Haemophilus influenzae. The organism was isolated from three different patients with purulent ear discharge making three isolates. It was found out hat the best medium (considering the availability) for growing the fastidious organism was the cation-supplemented Mueller-Hinton Agar. A purified isolates were then induced to synthesize the B-lactamase by subjecting them into the antibiotic. The B-lactamase producing strains were then subjected to broth microdilution technique testing for the determination of minimum inhibitory concentration (MIC) of ampicillin trihydrate for each isolated at four levels of L-ascorbic acid namely: 0.25, 1.0, 4.0, 10.0 ug/ml and a control setup. These were then subjected to primary and secondary subjection to simulate in vivo induction. It was found that as the concentration of L-ascorbic acid is increased, the susceptibility level of Haemophilus influenzae to ampicillin trihydrate increases, and vice versa. Applying statistical analysis, particularly analysis of variance and hypothesis testing for the difference of two population means: paired observation showed a significant difference on the effects of different levels of L-ascorbic acid and more so, a significant difference on the different levels of subjection. From primary to secondary subjection, there is a general decrease in susceptibility for all levels. However, the 10 ug/ml showed no significant difference between the primary and secondary. After the MIC determination, another test for B-lactamase synthesis was performed and it was found out that minimal amounts of the enzyme was synthesized. This study leads to the final recommendations that the public is informed not to use less than the recommended dosages and if resistant forms of Haemophilus influenzae is rampant the combination use of L-ascorbic acid and ampicillin trihydrate is hereby recommended to maximize susceptibility. Fri, 01 Mar 1991 00:00:00 GMT http://dspace.cas.upm.edu.ph:8080/xmlui/handle/123456789/3743 1991-03-01T00:00:00Z http://dspace.cas.upm.edu.ph:8080/xmlui/handle/123456789/3742 The Effect of Varying Concentrations of Diesel Oil on the Intestinal Epithelium of Tilapia nilotica Chi, Eleanor T. Four groups of two-month old Tilapia nilotica were exposed to oil concentrations of 5, 10, 15, and 20 ppm for a period of two weeks. Histological sections were processed from the intestines of fish from the four groups. Comparative study of the sections from the experimental group with those from the control group yielded the following results: (1) Increase in thickness of the columnar epithelium directly proportional to the oil concentration; (2) Damage to the columnar epithelium represented by breaks/gaps in the epithelium observable only in the 15 and 20 ppm groups, (3) Damage to the lamina propria and submucosa represented by perforations observed only in the 15 and 20 ppm groups; and (4) Shorter villi observed only in the 15 and 20 ppm groups. Fri, 01 Mar 1991 00:00:00 GMT http://dspace.cas.upm.edu.ph:8080/xmlui/handle/123456789/3742 1991-03-01T00:00:00Z