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Iph2206:Pathology Question Paper

Iph2206:Pathology

Course:Bachelor Of Science In Public Health

Institution: Meru University Of Science And Technology question papers

Exam Year:2011

INSTRUCTIONS: Answer questions one and any other two questions
QUESTION ONE - (30 MARKS)
Write short notes on the following in relation to postharvest pathology of fruits and vegetables.
a) Pathogen penetration following physiological damage of a fruit. (5 Marks)
b) Influence of PH on microbial attack of fruits and vegetables. (5 Marks)
c) Effect of inoculums level on disease development in a vegetable. (5 Marks)
d) Modified atmosphere packing. (5 Marks)
e) Controlled atmosphere storage. (3 Marks)
f) Chilling injury (3 Marks)
g) Chemical inquiry (3 Marks)
QUESTION TWO – (20 MARKS)
Explain the strategies for postharvest control and prevention under the following headings:
a) Preharvest chemical treatment (5 Marks)
b) Postharvest chemical treatment (5 Marks)
c) Biological control (5 Marks)
d) Hygiene practices. (5 Marks)
QUESTION THREE – (20 MARKS)
a) Postharvest diseases are classified according to how infection is initiated. Explain this
statement. (10 Marks)
2
b) Explain the four main causes of postharvest losses. (10 Marks)
QUESTION FOUR – (20 MARKS)
a) Spore germination is a preliminary stage to fungal penetration into the host tissue.
Explain the three most important environmental factors that aid spore germination.
(15 Marks)
b) Name any five important general of moulds responsible for postharvest diseases of fruits.
(5 Marks)
QUESTION FIVE – (20 MARKS)
a) Distinguish between hydro-cooling and vacuum cooling in storage of fruits and
vegetables. (6 Marks)
b) Explain any three types of packaging employed in fresh produce. (9 Marks)
c) State and explain any five requirements of a container meant for packaging of fresh
produce. (5 Marks)

Iph2206:Pathology Question Paper

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