Harley−Prescott: Laboratory Exercises in Microbiology‚ Fifth Edition Front Matter Preface © The McGraw−Hill Companies‚ 2002 PREFACE Take interest‚ I implore you‚ in those sacred dwellings which one designates by the expressive term: laboratories. Demand that they be multiplied‚ that they be adorned. These are the temples of the future—temples of well-being and of happiness. There it is that humanity grows greater‚ stronger‚ better. Louis Pasteur (French chemist‚ founder of microbiology
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Florida State College at Jacksonville BSC 1005 – Life in its Biological Environment Lab 2 – Which Pest Control is Best for Basil? Name: One of the challenges of agriculture is finding the right balance between growing healthy nutritious food; protecting humans‚ wildlife‚ and the environment from pesticides and herbicides; and ensuring a profit. Scientists and agronomists work together to help find this balance. This lab will give you an opportunity to learn about one of these collaborations
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seeing bubbles‚ I ruled out Streptococcus lactis. My organism did have the catalase enzyme; meaning it was either Bacillus subtilis or Staphylococcus. To distinguish the two‚ I performed the simmons citrate test on them. Since the tube stayed green I confirmed that my organism was Staphylococcus. My organism B could not degrade citrate‚ so that meant my organism was not Bacillus subtilis. In conclusion‚ my unknown organisms were Staphylococcus and Enterobacter aerogenes. REFERENCES Kidane‚
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showed significant fluctuations in different points indicating radically heterogeneous conditions throughout the distribution system. The total count varied from 1.2x102 to 6.3x103 cfu/ml. Different bacterial genera including Alcaligenes spp.‚ Bacillus spp.‚ Corynebacterium spp.‚ Escherichia spp.‚ Micrococcus spp.‚ Pseudomonas spp.‚ Shigella spp.‚ Staphylococcus spp. and Streptococcus spp. were isolated from the collected samples. The bacterial community was found to be diversified where the
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poisoning‚ while Streptococcus pyogenes may cause tonsillitis and strep throat. Bacillus Bacillus refers to rod shaped bacteria that are usually Gram-positive or negative. E. coli and Salmonella are the most commonly encountered species responsible for food poisoning and typhoid fever‚ respectively. According to the University at Albany‚ bacillus also includes two of the most dangerous bacteria known‚ that is Bacillus anthracis‚ which causes the lung disease anthrax‚ and Clostridium‚ which causes
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MEDICALLY IMPORTANT BACTERIA | GRAM-POSITIVE BACTERIA * Alpha and gamma hemolysis on blood agar * Bacillus cereus colonies on blood agar * Beta-hemolysis on blood agar (S.aureus) * Beta-hemolysis on blood agar * Beta-hemolytic colonies on blood agar * Clostridium perfringens Gram stain * Corynebacterium diphtheriae Gram stain * Corynebacterium pseudotuberculosis on blood agar * Enterococcus faecalis * Enterococcus faecalis on blood agar * Enterococcus faecalis Gram stain
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cell wall and are not washed away easily. 4. Attach photos on JPEG format showing a gram positive and gram negative bacterial sample showing their gram staining reaction. Give the name of the bacterial cells‚ shapes and arrangement. (9 marks) Bacillus cereus: Rod shaped and chain arrangement‚ Gram positive http://aapredbook.aappublications.org/content/1/SEC131/SEC143/F178.large.jpg Neisseria gonorrhoea: Coffee bean shaped and diplococcus arrangement‚ Gram negative http://upload.wikimedia
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Exercise 3.9 Endospore Stain (Differential Stain) Eula Lewis Bio 2921 February 27‚ 2013 Zere Ezaz‚ Ph. D. Objective: 1. To learn to endospore stain 1. To distinguish endospores‚ free spore‚ and vegetative cells Theory: A dormant form of bacterium that allows it to survive poor environmental conditions are called endospores. Their tough outer covering is made of keratin and is also the reason they are resistant to heat and chemicals. The strength of keratin also makes it resist
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Review all chapters in your exercise manual beginning with the introduction INTRODUCTION: (Covered 9.4.14 II Week 1) Biosafety levels1: basic level of containment. Hand washing or wearing gloves 2: Appropriate for working with human body fluids. Autoclave‚ sharps containers‚ lab coats 3: appropriate for working with pathogens that can be transmitted via respiratory route. Self-closing‚ double doors and sealed windows 4: Highest level. Aerosol pathogens; pathogens with no vaccine/treatment. Separate
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increased‚ and high antimicrobial activity (MIC‚ ∼10 μg/ml) was observed in methanol extracts of the inoculated red soils. Antibiotic-producing microorganisms whose numbers increased during incubation included actinomycetes‚ Lysobacter spp.‚ and Bacillus spp. The actinomycetes produced actinomycin C2 and actinomycin C3. No myxobacteria or lytic bacteriophages with activity against either M. luteus or S. aureus were detected in either soil before or after inoculation and incubation. These results
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