Deck 14

Question 1

Phytomyces chartarum belong to

Answer 1

a) Sporidesmuim bacteri -> causes facial eczema
b) Mycotoxins & photodynamic -> produces sporidesmin?

Question 2

Mode of penetration of insecticides

Answer 2

a) Systemic insecticides -> penetrate cellular fluids
b) Per oral insecticides -> through digestive tract
c) Fugimate insecticides -> through respiratory tract
d) Contact insecticides -> through skin

Question 3

Fluorides inhibit

Answer 3

a) Glycolysis enzymes
b) Kerbs cycle enzymes

Question 4

Digitoxin

Answer 4

Cordiotonic glycoside -> used in treatment of congestive heart failure

Question 5

MCPA - where does it belong & its mechanism of action

Answer 5

MCPAis one of the most frequently used herbicides in many countries. It belongs to derivates of pheenoxy acid & is used as a herbicide and algicide.

MECHANISM OF ACTION : inhibition of ribonuclease synthesis, uncoupling of oxidative phosphorylation and demyelination of peripheral nerves

CLINICAL SIGNS : fatigue, vomitus, diarrhoea, anorexia, tremors, ataxia, hyperventilation, hypoxemia. Higher dose –> stiffness of leg muscles, paralysis & coma

THERAPY : supportive and symptomatic

Question 6

Determination of phenols & cresols

Answer 6

a) Steam Distillation :
i. Test with ferric chloride (FeCl3)
1. Yellow -> negative
2. Blue -> presence of phenols
3. Blue-green -> presence of cresols
4. Red -> presence of acetic acid
ii. Test with Millon’s reagent –> pink/red (positive result)