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SOLUTION to Bio-205L Microbiology Lab – Topic 6 Microorganisms and Humans – Infectious Disease Lab Worksheet.
SAMPLE 1
Data Collection:
Table 1. Observations of Pathogenic Microorganisms and Treatment Options for the Diseases They Cause
| Name of Organism | Morphology/ Type | Sketch | Disease Caused/ Source of Infection | Treatment |
| Bacillus anthracis | Gram-positive, rod-shaped bacterium Spore-forming | Causes Anthrax Infection through contact with infected animals or contaminated animal products. | Antibiotics (ciprofloxacin, doxycycline) | |
| Clostridium botulinum | Gram-positive, rod-shaped bacterium | Causes Botulism Consuming improperly canned or preserved foods. | Antitoxins supportive care | |
| Clostridium tetani | Gram-positive, rod-shaped bacterium | Causes tetanus Infection through contaminated wounds, especially deep puncture wounds and soil or animal feces containing C. tetani spores entering the wound. | Tetanus toxoid Wound debridement Antibiotics if infection present | |
| Corynebacterium diphtheriae | Gram-positive, rod-shaped bacterium | Causes diphtheria Infection through close physical contact with infected persons | Antitoxin Antibiotics (penicillin, erythromycin) | |
| Name of Organism | Morphology/ Type | Sketch | Disease Caused/ Source of Infection | Treatment |
| Hemophilus influenzae | Gram-negative, rod-shaped bacterium | Causes meningitis and Pneumonia. Infection through close contact with carriers | Antibiotics (ceftriaxone, amoxicillin) | |
| Mycobacterium tuberculosis | Acid-fast, rod-shaped bacterium | Causes tuberculosis (TB) Infection through inhalation of airborne droplet containing the bacteria, usually from coughing or sneezing of an infected person. | Long-term antibiotic treatment (isoniazid, rifampin) | |
| Neisseria gonorrhoeae | Gram-negative diplococci | Causes gonorrhea Sexual contact with an infected individual | Antibiotics (ceftriaxone, azithromycin) | |
| Salmonella typhi | Gram-negative, rod-shaped bacterium | Causes typhoid Ingestion of food or water contaminated with feces from infected individuals. Consuming food handled by an asymptomatic carrier. Poor sanitation and inadequate hygiene practices. | Antibiotics (ciprofloxacin, azithromycin) | |
| Name of Organism | Morphology/ Type | Sketch | Disease Caused/ Source of Infection | Treatment |
| Shigella dysenteriae | Gram-negative, rod-shaped bacterium | Causes shigellosis (bacillary dysentery) Infection through Contact with contaminated surfaces or objects. | Antibiotics (ciprofloxacin, azithromycin) | |
| Staphylococcus aureus | Gram-positive cocci | Causes Pneumonia and Endocarditis Infection through direct contact with infected individuals | Antibiotics (methicillin, vancomycin) | |
| Streptococcus pneumoniae | Gram-positive cocci | Causes Pneumonia, Meningitis, and Bacteremia. Infection through close contact with carriers. | Antibiotics (penicillin, amoxicillin) | |
| Streptococcus pyogenes | Gram-positive cocci | Causes skin infections (impetigo, cellulitis, erysipelas) and Scarlet fever Infection through direct contact with infected individuals | Antibiotics (penicillin, amoxicillin) | |
Review Questions
Match each word to its definition below:
| 1. Erythrocytes | b |
| 2. Nonpathogen | j |
| 3. Pathogen | u |
| 4. Streptococcus pyogenes | h |
| 5. Streptococcus pneumoniae | n |
| 6. S. mutans | k |
| 7. Enterococci | s |
| 8. Helminths | l |
| 9. Hemolysin | m |
| 10. Biodegradation | i |
| 11. Streptococcus agalactiae | r |
| 12. Rebecca Lancefield | o |
| 13. Hemolysis | d |
| 14. STD/STI | g |
| 15. Beta-lactam drugs | a |
| 16. Biotechnology | t |
| 17. Three groups of hemolysis | e |
| 18. M protein antigen | p |
| 19. Endocarditis | s |
| 20. Gamma hemolysis | q |
| 21. Beta hemolysis | c |
- Penicillin, cephalosporin
- Red blood cell
- Completely breaks down red blood cells
- The breakdown of red blood cells
- Alpha, beta, and gamma
- Caused by S. mutans or Enterococcus
- Genital herpes, gonorrhea, syphilis, papillomavirus infection
- Interferes with phagocytosis, associated with strep throat, glomerulonephritis, and flesh-eating infection
- Used to clean up oil spills or degrade pollutants
- Cause no harm but beneficial to humans such as normal flora
- Cause dental decay
- Parasitic worms
- Enzyme that breaks down red blood cells
- Cause pneumonia, otitis, conjunctivitis, and sinusitis
- Who classified streptococci into groups
- Associated with M protein antigens
- Nonhemolytic on blood agar
- Associated with neonatal meningitis
- Cause sosocomial infection, urinary infection or any related abdominal infection, endocarditis, bacteremia, and meningitis
- Make medications such as insulin, biofuel, dietary supplements, antibiotics, and many other useful products
- Microorganism that causes disease