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Home Microbiology Heated Canned Foods Comments

  • Question
  • Sulfur stinker spoilage, caused by is uncommonly found in


  • Options
  • A. low acid foods
  • B. medium acid foods
  • C. high acid foods
  • D. any of these

  • Correct Answer
  • low acid foods 


  • Heated Canned Foods problems


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    • 1. The butyric acid type of fermentation in acid or medium acid foods, with swelling of the container by the carbon dioxide and hydrogen gas is caused by

    • Options
    • A. C. butyricum
    • B. C. pasteurianum
    • C. both (a) and (b)
    • D. C. sporogenes
    • Discuss
    • 2. The presence of viable non-spore forming bacteria in heat process canned foods indicates leakage of the container. Which of the following is responsible for the spoilage of leaky cans?

    • Options
    • A. Plant equipment
    • B. Cooling water
    • C. Highly acidic medium
    • D. High sugar content
    • Discuss
    • 3. The technique first described to determine the incipient spoilage in meat was

    • Options
    • A. homogenate extract volume (HEV)
    • B. agar Plate Count (APC)
    • C. extract Release Volume (ERV)
    • D. none of the above
    • Discuss
    • 4. Beef hams are made spongy by species of

    • Options
    • A. Rhodotorula
    • B. Bacillus
    • C. Pseudomonas
    • D. red Bacillus
    • Discuss
    • 5. Colorless rots in eggs is caused by

    • Options
    • A. Pseudomonas alcaligenes
    • B. Pseudomonas fluorescens
    • C. both (a) and (b)
    • D. none of these
    • Discuss
    • 6. Canned poultry is more often spoiled by

    • Options
    • A. putrefactive than by Saccharolytic Clostridia
    • B. Saccharolytic Clostridia than by putrefactive
    • C. Saccharomyces species
    • D. Micrococcus species
    • Discuss
    • 7. Which of the following strain(s), that grow in the jellies and candid fruits, are able to grow in sugar concentration upto 67.5%?

    • Options
    • A. Aspergillus
    • B. Penicillium
    • C. Citromyces
    • D. All of these
    • Discuss
    • 8. Which of the following(s) is/are porteolytic or putrefactive decomposing proteins with the production of malodorous compounds such as H2S, mercaptans, ammonia, indole and skatole?

    • Options
    • A. C. sporogenes
    • B. C. putrifaciens
    • C. both (a) and (b)
    • D. C. butyricum
    • Discuss
    • 9. The most important kind of chemical spoilage of canned foods is the hydrogen swell which is favored by

    • Options
    • A. increasing acidities of foods
    • B. increasing temperature of storage
    • C. imperfection in the tinning and lacquering
    • D. all of these
    • Discuss
    • 10. Which of the following species can cause bitterness, acidity and curdling in canned milk, cream and evaporated milk?

    • Options
    • A. Bacillus
    • B. Clostridium
    • C. both (a) and (b)
    • D. Saccharomyces
    • Discuss


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