58181 - Food Hygiene and Technologies

Learning outcomes

At the end of this course the student will (should) know the principles of surveillance systems on foodborne zoonoses. They will understand how control measures and good hygienic practices can be used to eliminate or mitigate the hazards. They need to know how quality controls in the food production chain are actuated, how information on the food supply chain are gathered (monitoring and surveillance plans) and how/why management options are actuated. Students should be able to collaborate in epidemiological investigations during outbreaks of foodborne illness and how communicate information and data that make it possible to recognize the origin and take action to limit its spread. Students have to know the diagnostic techniques that allow detection, characterization and quantification of microorganisms that cause food borne illness. Students will (should) understand what are the factors that influence the proliferation, survival and death of microorganisms in food. The should be able to assess the risk associated with the production of food of animal origin. Students must know how to apply the HACCP system in order to ensure the production of safe foods. They have to understand how the food business operators define process objectives and if they are appropriate to achieve the food security objectives established by National and European provisions. Students should be able to actuate sampling plan for food and interpret their results. They should be acquainted with the microbiological criteria laid out by the current EU regulations. They should be able to evaluate the compliance of production facilities with the requirements laid down by hygienic regulations on the production of food of animal origin and how to prepare an audit report. They shoul be able to use databases and useful software to estimate the risk and the shelf life of food. They must know the principles of food preservation and the causes of alteration of a biological nature and the possible toxic effects resulting from microbial spoilage.

Course contents

1. Microorganisms and food characteristics: basic principles of food processing and preservation(T 4 hours).

2. Use of predictive models to estimate the growth, survival and inactivation of microorganisms in the food processes. Combase software (4 hours P).

3. Food contamination monitoring and food-borne disease surveillance (2 hours T).

4. Etiological, epidemiological and clinical aspects of salmonellosis, campylobacteriosis and infections by enterohemorrhagic Escherichia coli strains. Biosecurity and surveillance of salmonellosis at farm and slaughterhouse (4 hours T).

5. Pathogenicity mechanisms of infectious diarrhea and extra-intestinal complications (1 hour T).

6. Analytical methods for detection and characterisation of Salmonella, Campylobacter and VTEC in food (1 hour T).

7. Hygiene and technologies in the slaughterhouse (3 hours T)

8. Hygiene on the dairy farms and microbiological characteristics of raw milk (2 hours T)

9. The epidemiology and control of raw milk-associated food-borne disease (1 hour T)

10. Hygiene and technology of dairy products (3 hours T)

11. Heat treatments and physical sterilisation of milk (pasteurisation, UHT, microfiltration) and aseptic packaging methods (3 hours T).

12. Investigation of an outbreak of foodborne illness: methods for monitoring and recognition of a foodborne illness outbreak; investigations to develop hypotheses, analysis of data, calculating odds ratio with and without matching, tracking, control methods (2 hours P).

13. Food Botulism: pathogenesis, epidemiology and control methods. Hurdle theory, role of salt, additives and starter cultures in aged meat products (2 hour T)

14. Listeriosis: pathogenesis, epidemiology and control methods (2 hours T)

15. Cleaning, disinfection and pest control in the food industry (2 hour T)

16. Spoilage of food. Phenomena related to the activity of spoilage bacteria in meat, milk, dairy products, eggs and fish (1 hour T)

17. Hygiene and safety of fishery products and shellfish. Control of food-borne virus diseases, parasites and histamine intoxication (3 hours T)

18. Process controls: sampling and monitoring plans, HACCP and the audit procedures (4 hours T)

19. Food operations self-control and structural requirements in food industry (1hr P)

22. Quantitative risk analysis: microbiological criteria and performance objectives; risk management strategies, priority setting and cost-benefit analysis (2 hours T).

Readings/Bibliography

Educational materials consist of recommended text books and of keynotes and documents available to students in the appropriate https://virtuale.unibo.it/ website or via the website of the teacher of the course http://www. unibo.it / teachers / marcello.trevisani 

The recommended text books are:

- Various Authors (by Giampaolo Colavita). Hygiene and technology of food of animal origin. Point Veterinaire Italie. 2012 

Teaching methods

The teaching consists of lectures (41 hours) and practical classes (7 x 4 hours)

a. Lectures

They provide an illustration of the production chains of food (meat, fish and dairy products) in order to make the students appreciate what aspects are most critical and how the implementation of good hygiene practices and controls process to guarantee food security in compliance with the rules. For the constraints of time and availability of facilities (slaughter faculty, stable and dairy) will be used also videos and pictures to facilitate the understanding of the different, important production chains.

b. Practical lessons

These are mainly carried out by dividing the students into two groups in shifts of 2 hours.

Case studies will be used to evaluate the control methods for the microbial hazards in food by adopting a predictive microbiology approach

An interactive software will be used to learn the investigation methods that are used to detect the origin of foodborne outbreaks and implement control measures.

At the faculty slaughterhouse the students will approach the hygiene auditing in beef slaughterhouse and the use of checklists for slaughterhouse structure.

Assessment methods

The examination at the end of the course aims to assess the achievement of the main learning objectives:
1) Ability to gather and interpret in an effective and comprehensive way the laboratory (microbiological) data and the reports of epidemic surveillance on major food borne illness;
2) Knowledge of food technology (used in processing of meat, milk and dairy products, fish products) hazard assessment (raw materials and processes) of control measures (CCP) and the principles of hygiene
3) Ability to appreciate the pathogenic mechanisms, the potential for growth and survival in foods of the main biological agents responsible for diseases with food and their ability to resist treatment of storage and preparation of food for consumption.

The final grade of the course "Safety and food hygiene" consists of the synthesis of the final evaluations of the different topics that are treated in the course.The weighted average of the scores get for each module will be recorded in the exam report. Laude is given when the maximum score has been given for all the modules.

The evaluation of the students for the module of 'Food Hygiene and Technology' consists of a written test that aims to evaluate the ability to make choices in the management of food safety through the application of HACCP principles. The test is preferably done at the end of the course and consists of two parts: a test concerning the estimation of microbiological risk (with the help of the Combase software) and a test with multiple-choice, short-answer questions and a short paper. During the practical exercises, students will be guided in the use of estimation models and in the analysis of risk factors. Test tests, similar to those the teacher uses for the exam, are available on the 'virtual' didactic portal. Students will be able to take or repeat the written test also in the sessions (winter and summer window). The 'Combase' test will take place in the 3 days preceding the exam dates (response time 45 minutes) through the Online Exams (EOL) platform. On the day of the exam, in the same way, there will be a written test on the other topics of the course (response time 90 minutes). In informing the students of the results, the teacher will indicate, if there is at least a sufficient score, which were the main topics in which gaps emerged. Students can decide to take an integrative oral exam that will focus on these specific points. The answers will allow to improve the evaluation.

Teaching tools

Keynotes of lectures and didactic documents used for the practical training are published in the UniBo server, in the section 'virtual learning environment'. Textbooks are available at the Department's library.

Office hours

See the website of Marcello Trevisani