Question from a student 20160412

Q:

I am a student from FNSC31810 this semester, I would like to know

1. what formats of the questions will be included in the final exam? is it similar to the past exams? 

2.from the epidemiological exercise (the one on page 49 of the supplementary note, about picnic and Clostridium perfrigens), in part d, it was asked to ans the transmission of the C.perfrigens,

My ans: C.perfringens are existing in the turkey stuffing and enter the human body by oral route. Is it enough? or should I need to explain about how it infects the intestinal cells and cause intoxification?

3.in part e, what should be included in the scenario? 

my ans would include the inproper handling of the vegetables (not wash throughly) so C.perfringens are still there, and the temperature (without refrigeration) is suitable for the growth of C.perfringens, so pre-formed toxins are existing and consumed by human, the toxins affect the intestinal cells and stimulate the synthesis of cAMP and cGMP, cause reversal of ion and water absorption process so ions and water are lost and resulting in diarrhea.

Ans:

1. Essay and problem-solving question. Yes, they are similar to past examinations.

2. No, you do not need to discuss the pathology.   You would need to discuss the disease path with C. perfringens endospores in the stuffings germinate and grow. It is not fecal-oral. 


3. Yes, you should suggest how the turkey was prepared and the possible mishandling of the turkey providing opportunity for C. perfringens to grow. You The focus should be on food safety rather than pathology. C. perfringens causes a combination of infection and intoxication.