Methodology: We included 150 patients (30 men, 120 women; age range 11-70 years) who gave consent to be included in the study. Swabs were taken from dental plaque and inoculated on basal salt medium containing yeast and bacterial colonies obtained were identified biochemically according Bergey's Manual of Systematic Bacteriology. Antibiotic susceptibility test was then conducted on the isolates identified. Results: Ninety-five (63.3%) patients had cavities located at the molars, forty-five (30%) between molar and premolar and ten (6.7%) located at the gingival margin. One hundred and twenty (80%) samples were obtained from female patients and thirty (20%) from male patients. Lactobacillus species had the highest occurrence (28.8%). The least was Fusobacterium species (0.7%). The antibiotic susceptibility test revealed that Enterobacter species was resistant to all the three antibiotics used in this study. Bacillus subtilis and Staphylococcus were resistant to erythromycin and vancomycin but sensitive to all the three antibiotics. Conclusion: A few common acidogenic bacteria known to colonize dental plaque were identified. Susceptibility of the various bacterial isolates to the selected antibiotics varied. Further studies on susceptibility of these bacteria to commonly used antibiotics, antibacterial mouth washes and toothpastes are necessary in order to understand their epidemiology, to limit the spread of resistant bacteria. Larger sample size studies with better isolation, identification and characterization methods are needed. These studies could lead to the identification of strategies for effective biological interventions in the caries process and thereby contribute to improved prevention and treatment.

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Seven improved tropical grass species, namely, Andropogon gayanus Kunth., Brachiaria ruziziensis Germain & Evrard, Cenchrus ciliaris L., Chloris gayana Kunth, Panicum maximum var. coloratum C.T, Paspalum orbiculare G. Forstand Sorghum almum Parodi were evaluated for yield and yield components at the Teaching and Research Farm of the Federal University of Agriculture, Makurdi, Nigeria in 2015 and 2016. The experiment was laid out in a randomized complete block design with three replications in each of the years. Results showed that the evaluated grass species could be cut at an early age when the leaf: stem ratio is high enough for the ruminants to derive maximum nutritional benefit and need not be delayed till 16 weeks after planting. The highest correlation between plant height and grain yield was observed at 4 weeks (r = 0.69) and 8 weeks (r = 0.70) after planting, implying that the taller the plant species at this stage of growth, the higher the probability for high grain yield. Identification and selection of tropical grass species for improvement in grain production should, therefore, be carried out between 4 and 8 weeks of growth. All the seven tropical forage grass species performed favourably well in terms of growth and yield, with the positive response to increasing rainfall and further studies on multi-location evaluation within the Southern Guinea Savanna agro-ecologicalal zone of Nigeria is recommended.