eChapters

Order: Diptera
Sub Order: Orthorrhapha
Series: Nematocera
Family: Ceratopogonidae
Genus: Culicoides
Species: Culicoides oxystoma, C. imicola 
Common name: Biting midges or Biting gnats or punkies or No see-ums.
Hosts: Animals and man 
Distribution: Worldwide 
Morphology of fly

1. Size is 1-3 mm in length. They are the smallest blood sucking flies. They can easily pass through mosquito nets.

Order: Siphonptera (Fleas)
Class: Insecta
Subclass: Pterygota 
Division: Endopterygota
Order: Siphonaptera
Siphonaptera derived from two greek words viz. siphon (sucking) and apteron (wingless)
General characters of fleas
1. Body is laterally compressed.
2. Tegument is highly scleritized. Outer chitinous layer is very thick and it is dark brown in colour.
3. A pair of simple eye or ocelli are present on head. Compound eyes absent.

Bugs
Class: Insecta
Subclass: Pterygota 
Division: Exopterygota
Order: Hemiptera (Bugs)
Characters
1. These are true bugs.
2. Mouth parts adapted for piercing and sucking. Proboscis kept folded in head when not in use.
3. Two pairs of wings usually present, anterior harder pair called hemelytra.Posterior pair is membranous.
4. Both male and female are blood suckers.
5. Metamorphosis is incomplete

Order: Orthoptera

This order includes cockroaches and grasshoppers. They bear the following characters:

1. The body is oval and flattened in cockroach and elongated in grasshopper.

2. Two pairs of wings are present. Mesothoracic pair of wings is thickened (Tegmina) and act as cover for membranous metathoracic pair of wings.

3. Antennae are long and multi-jointed.

4. The legs are modified for fast running (cockroach) or jumping (grasshopper).

5. Metamorphosis is incomplete.

Mites
Subclass: Acari
Order: Parasitiformes 
Suborder: Gamasida/Mesostigmata
Characters
1. Mites of this group have the stigmata or spiracles in the middle of the body, hence suborder Gamasida is also called suborder mesostigmata. Mites of this group are referred as gamasid mite.
2. Size of these mites are large about 0.6-2.5 mm in length and hence visible via naked eye.
3. They parasitisize birds and mammals.

Class: Pentastomida

General characters

1. Usually, they are considered as aberrant arthropods as some authors suggest it to be related to annelids.

2. They are elongated, tongue like and transversely striated or sometimes, deeply ringed giving beaded appearance especially at the anterior end.

3. Two pairs of strong hooked claws are present at anterior-ventral surface.

4. Eggs contain fully developed larvae when laid

Key Points

• Burns are injuries caused by hot solids or flames.

• Scalds are injuries caused by liquids or steam.

Key Points

• Hypothermia occurs when an individual's body temperature drops below its critical level.

• Excessive heat loss or inadequate thermoregulation can lead to this condition.

• It can be minor or severe. Mild hypothermia is harmless, while moderate to severe hypothermia is an emergency.

Congestion/ Hyperemia

Hyperemia is increased amount of blood in circulatory system. It is of two types, active and passive. In active hyperemia blood accumulates in arteries while in passive hyperemia the amount of blood increases in veins (Figs. 3.1. to 3.4).

Etiology

• As a result of inflammation.

• Obstruction of blood vessels.

Macroscopic features

• Organ becomes dark red/cyanotic.

• Size of organ increases.

• Neoplasm General

• Neoplasm in cattle and buffaloes

• Neoplasm in sheep and goat

• Neoplasm in equines, swine and camels

• Neoplasms in pet animals

• Neoplasms in poultry

• Neoplasms in wild animals

• Neoplasms in laboratory animals

1. Particulate and duplicate nature of heredity factors or element was first demonstrated by
a) Bateson 
b) Mendel
c) Morgan 
d) Punnett
2. The particular site or position of a gene in a chromosome is known as
a) Genotype 
b) Phenotype
c) Locus 
d) Allele
3. Linkage group in swamp buffalo
a) 25 
b) 30
c) 24 
d) 26

1. If AAGCT is the base sequence on one side of DNA molecule, what will be complementary sequence on the other side?

a) UUGCA

b) TTCGA

c) AAGCT

d) GGTCA

2. The start codon in the mRNA sequence is

a) AUG

b) UAG

c) UGA

d) UAA

1. PhuleTriveni synthetic cattle evolved by the crossing of

a) Holstein x Jersey x Rathi

b) Holstein x Brown Swiss x Gir

c) Holstein x Jersey x Gir

d) Ayrshire x Jersey x Gir

2. Chhota nagpuri breed of sheep is found in

a) Nagpur

b) Uttar Pradesh

c) Jharkhand

d) Gujarat

1. Heritability in narrow sense is

a) VA/VP

b) VE/VP

c) VG/VP

d) VA+VG/VP

2. Repeatability value set in _________ of heritability

a) Lower limit of h₂

b) Upper limit of h₂

c) Intermediate of h₂

d) Both a and b

1. The most effective method of selection is

a) Mass selection

b) Pedigree selection

c) Progeny testing

d) Selection index

2. The intensity of selection depends with number traits considered ‘n’ is

a) 1/n

b) 1/n²

c) n

d) 1/√n

Hyperaemia and Congestion
Definition
Hyperaemia is increased volume of blood in affected tissue or part.
Hyperaemia (Active Hyperaemia)
Occurs in arterioles or arteries
Increased blood flow in capillaries
Congestion (Passive Hyperaemia)
Occurs due to impaired venous drainage
Stasis of blood in veins
classification of hyperaemia