Pig International - January/February 2017 - 15

PigInternational ❙ 15

However, dietary protein deficiency also created a markedly altered AGP level independent
of health status. Pig age also affected AGP
level. Therefore, if a baseline for AGP is established in a given herd, an elevated AGP level
might be interpreted as a health challenge
when it is actually elevated due to inadequate
dietary protein. The dietary changes appropriate for inadequate protein versus severe health
challenge are not likely the same. A plethora
of other acute phase proteins exist which can
be assayed and are sensitive indicators of infection.

These approaches allow either a rapid response or
an altered set of dietary nutrients provided continuously. If the relative risk of disease outbreak is low, relying
on rapid responses may be the best solution because
there is always a cost of altering the diet. Increasing
levels of certain nutrients is expensive if an anticipated
disease does not occur. Likewise, decreasing dietary
amino acid density is biologically inefficient if a disease does not take hold. But in production systems
where disease load is continual, or the risk of disease is
high, nutritional intervention may be appropriate.

How to naturally
improve pig health
status: www.
WATTAgNet.com/
articles/27536

Antibody titers
Antibodies produced in response to pathogenic organisms are relatively easy to quantify
in swine serum. This allows diagnosis of specific pathogens to which pigs have responded
immunologically. Researchers at Iowa State
University used a combination of immunological titers and the concentration of AGP to
characterize the health status of two groups
of pigs reared via different management
schemes. Pigs reared via segregated early
weaning schemes had no antibody titers to
common pathogens in the herd of origin, low
AGP levels and a high rate and efficiency of
gain. Pigs reared in a continuous flow environment possessed antibody titers to pathogens
in the herd of origin, had higher AGP levels
and a lower rate and efficiency of gain. In
this study, the presence of antibody titers did
seem related to immunological stimulation
expressed as AGP levels.

Acute health challenge
Counteracting the effects of an acute health challenge requires a rapid response specifically targeted to
that particular disease. Typically these responses come
in the form of injectable antibiotics, water-soluble antibiotics or therapeutics, and pre-determined nutritional
strategies based on anticipated health challenges.
January/February 2017 ❙ www.WATTAgNet.com

Chronic health challenge
The prevailing theory on amino acid nutrition for
carcass protein deposition during a health challenge
states that because protein accretion rate is decreased,
amino acid requirements for growth are decreased.
For example, chicks subjected to immunologic stress
had lower lysine and methionine needs for growth
compared with healthy chicks. Also, chicks fed a methionine deficient diet did not exhibit increased levels
of pro-inflammatory cytokines in response to immunologic stress. In addition, pigs reared via management
schemes that resulted in a high level of immune system
activation had slower and less efficient body growth, a
lower percentage of carcass muscle and required lower
levels of dietary amino acids to maximize growth. The
degree to which amino acid requirements are lowered
will depend on severity of the health challenge.

In brief
Matching nutritional inputs to a disease challenge
can have several benefits, even though nutrition cannot
generally overcome all the effects of disease. ■


http://www.WATTAgNet.com/articles/27536 http://www.WATTAgNet.com/articles/27536 http://www.WATTAgNet.com

Table of Contents for the Digital Edition of Pig International - January/February 2017

Pig International - January/february 2017
Contents
Managing livestock antibiotic resistance with diagnostics
How to quantify health status in farm animals
6 major piglet diarrhea causes and their management
Boosting piglet immunity with colostrum
Practical grinding guidelines for pig feeds
How to train gilts for electronic sow feeding systems
Fermented liquid pig feed benefits outweigh drawbacks
5 new smart farming pig products from EuroTier
VIV Asia 2017 to represent entire animal protein chain
Pigs and Money
Industry Happenings
Products
Marketplace
Pig International - January/February 2017 - Pig International - January/february 2017
Pig International - January/February 2017 - Cover2
Pig International - January/February 2017 - Contents
Pig International - January/February 2017 - Pigs and Money
Pig International - January/February 2017 - Industry Happenings
Pig International - January/February 2017 - 5 new smart farming pig products from EuroTier
Pig International - January/February 2017 - 5
Pig International - January/February 2017 - 6
Pig International - January/February 2017 - 7
Pig International - January/February 2017 - 8
Pig International - January/February 2017 - 9
Pig International - January/February 2017 - Managing livestock antibiotic resistance with diagnostics
Pig International - January/February 2017 - 11
Pig International - January/February 2017 - 12
Pig International - January/February 2017 - 13
Pig International - January/February 2017 - How to quantify health status in farm animals
Pig International - January/February 2017 - 15
Pig International - January/February 2017 - 6 major piglet diarrhea causes and their management
Pig International - January/February 2017 - 17
Pig International - January/February 2017 - Boosting piglet immunity with colostrum
Pig International - January/February 2017 - 19
Pig International - January/February 2017 - 20
Pig International - January/February 2017 - 21
Pig International - January/February 2017 - 22
Pig International - January/February 2017 - VIV Asia 2017 to represent entire animal protein chain
Pig International - January/February 2017 - Practical grinding guidelines for pig feeds
Pig International - January/February 2017 - 25
Pig International - January/February 2017 - 26
Pig International - January/February 2017 - 27
Pig International - January/February 2017 - How to train gilts for electronic sow feeding systems
Pig International - January/February 2017 - 29
Pig International - January/February 2017 - 30
Pig International - January/February 2017 - 31
Pig International - January/February 2017 - Fermented liquid pig feed benefits outweigh drawbacks
Pig International - January/February 2017 - 33
Pig International - January/February 2017 - 34
Pig International - January/February 2017 - Products
Pig International - January/February 2017 - Marketplace
Pig International - January/February 2017 - Cover3
Pig International - January/February 2017 - Cover4
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