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Reproductive disorders and their
management in cattle
Dr. Pascal Nyabinwa, PhD
Senior Research Fellow
RAB
Tel. (+250) 785324631
E-mail: nyabipass@gmail.com
ORCID iD. https://orcid.org/0000-0001-8568-7910 1
nyabipass@gmail.com
Presentation outline
1. Anatomy of cow reproductive tract (recall)
2. Artificial Insemination (AI) procedures (Recall)
3. Reproductive and productive cycles (cows)
4. Reproductive diseases and periods of occurrence
5. Risk factors
6. Effect of disease on reproductive performance in dairy cows
7. Vicious cycle of low AI success rate and low adoption rate
8. Fertility chain and Equation of reproduction
9. Management interventions for control and prevention of
reproductive disease in a dairy farm
10. Management of uterine infections (key TTT)
11. Cow-side diagnostic tests/rapid tests
12. Farm Manager’s Reproduction Management Tools
13. Take-home message
2
nyabipass@gmail.com
3
nyabipass@gmail.com
4
AI procedures
1.Outer procedures
Level 1- Heat detection
(or call from farmer
under AM-PM rule)
Level 2- AI’s equipment
identification, preparation
and handling
Level 3- Semen
identification, preparation
and handling
Level 4- Cow’s
preparation and hygiene
Level 5- Get the gun to the cervix
Level 6-Place the cervix over the gun
Level 7-Deposit the semen just through the
cervix into the uterine body
2. Inner
procedures
Level 9- Better record
keeping
Level 8-Disposal single
use materials in Dustbin
Level-10-
Calving
Level 11-
Calf
registration
nyabipass@gmail.com
5
nyabipass@gmail.com
Dry off Calving
Transition
period AI Gestation Disease
Mastitis
Milk fever
Dystocia
Uterine prolapse
Twin calving
Stillbirth
Retained placenta
Left displaced
abomasum
Ketosis/acetonemia
Metritis
Endometritis
Uterine involution (late)
Lameness & Brucellosis
Cyst
Postpartum anoestrus
Embryonic mortality
Abortion 6
Some reproductive diseases and period of occurrence
nyabipass@gmail.com
7
nyabipass@gmail.com
0
1
4
4
6
10
11
27
48
69
166
0 50 100 150 200 250
Left displaced abomasum
Ketosis
Uterine prolapse
Twin calving
Milk fever
Metritis
Endometritis
Stillbirth
Retained placenta
Mastitis
Dystocia
Prevalence of postpartum clinical diseases of dairy cows (n
= 250)
Postpartum diseases
Number of affected
cows
Percentage
prevalence (%)
Uterine diseases
Metritis 10 4.4
Endometritis 11 4.4
Retained placenta 48 19.2
Uterine prolapse 4 1.6
Non-uterine diseases
Mastitis 69 27.6
Ketosis/Acetonemia 1 0.4
Left displaced abomasum 0 0
Milk fever/post parturition paresis 6 2.4
Calving problems
Twin calving 4 1.6
Stillbirth 27 10.8
Dystocia 166 66.4
Uterine prolapse
Retained placenta
Endo/metritis
Mastitis Dystocia
8
nyabipass@gmail.com
Herd-level RFs
associated with
reproductive disease
in dairy cows.
Cow-level RFs associated with
reproductive disease in dairy cows.
9
BCS<3
nyabipass@gmail.com
10
nyabipass@gmail.com
Mastitis
Endometritis
Effect of disease on reproductive performance in dairy cows
11
nyabipass@gmail.com
CHARACTERISTICS OF MOST AFRICAN
COUNTRY DAIRY SECTORS
Vicious cycle of low
adoption
and high cost of
production
Higher prevalence of
TBDs among other
diseases discouraging
adoption of
improved breeds
12
Vicious cycle of low
productivity
and low investment in dairy
Vicious cycle of
low AI success
rate and low
adoption rate
nyabipass@gmail.com
13
nyabipass@gmail.com
 The use of AI can also be seen as a chain of
events - from the collection of semen from a bull
to the birth of a calf (records).
 To be successful in AI work, no failures can be
tolerated anywhere since each link in this chain of
events is of equal importance
 All the links in the chain should be strong enough
to strengthen the whole chain, as one weak link
(Weakest link) results in no conception, most likely
to the extent it will cancel many of the benefits
the AI technology offers
14
nyabipass@gmail.com
Applying the equation of reproduction
15
% pregnancy = CDHI x IE x FLH x SFL
Herd A
CDHI = 0.95
IE = 1
FLH = 0.9
SFL = 0.95
% Pregnancies from AI =??
Herd B
CDHI = 0.95
IE = 0.60
FLH = 0.90
SFL = 0.95
% Pregnancies from AI =??
In ideal situation such as the Herd A, all
four factors are very high. The result is
a relatively high percent of pregnancies
from AI during that time period
Herd B where a low % of IE (60%).
All other factors remain ideal.
Because of that one low factor, the %
of pregnancies from AI is lowered
from 81.2% to 48.7%. This specific
example emphasizes how important
it is to keep every % as high as
possible
nyabipass@gmail.com
SN Management interventions (MIs)
1 Avoid equipment-sharing between cows within the farm
2 Avoid equipment-sharing with neighbouring farms
3 Avoid housing fresh cows with diseased cows or those with chronic illnesses such as mastitis
4 Avoid off-farm bedding materials and maintain adequate bedding materials per cow
5 Avoid sharing or hiring a breeding bull
6 Consult ANHS provider about the treatment and prevention of mastitis and metabolic diseases
7 Consult ANHS providers about the treatment of positive cases
8 Cull of persistently positive cows
9 Disinfect equipments used in calving assistance before and after use
10 Keep the cows in a clean and dry shed
11 Maintain adequate feeding per cow
12 Maintain a clean transition cow housing
13 Maintain regular contact with ANHS providers for advisory support on disease prevention in dairy farm
14 Select sires based on calving ease
15 Select sires based on low percent stillbirths
16 Remove fetal membranes immediately after passing
17 Use gloves during calving assistance
18 Use an artificial insemination service
19 Use a sexed semen during artificial insemination service
20 Wash the hands and udder before each milking
Management interventions for control and prevention of reproductive disease in a dairy farm
Source:
16
nyabipass@gmail.com
•
Management of uterine infections
Cephapirin benzathine
nyabipass@gmail.com 17
Proposed decision tree for the treatment of
uterine infections in cows
Day > 21 pp - Check for size consistence and contents of the uterus
and presence of vaginal/cervical discharge/add lab methods if in
doubt
No CL on the ovary
Presence of CL on the ovary
Intrauterine antibiotic
(e.g. Metricure:
Cephapirin benzathine )
PGF2a i.m. (e.g.
Estrumate/Enzaprost; 2ml)
72h later – intrauterine antibiotic
(e.g. Metricure)
Uterine infections confirmed
nyabipass@gmail.com 18
Cow-side diagnostics
Use of rapid health information to manage the herd
19
 CMT
MASTITIS DETECTION
 ENDO/METRITIS SCORES
(METRICHECK TOOL)
ENDO/METRITIS
DETECTION
 ON-FARM PREGNANCY TESTS
(ALERTYS*, P4 Rapid test, ….)
• Early Pregnancy
diagnosis (Blood,
Serum, Plasma,
Milk)
• Cows in their
estrous cycle
 Hypocalcemia/ketosis rapid tests
nyabipass@gmail.com
1. Cattle Gestation Table based on 283 Days Gestation Period
20
2. Cows calendar
Farm Manager’s Reproduction Management Tools
nyabipass@gmail.com
21
Farm Manager’s Reproduction Management Tools (Cont’d)
3. Online Apps
a. Cow Pregnancy Calculator b. Cattle Gestation and Body Weight Calculator
nyabipass@gmail.com
Take-home message
22
 The core role of dairy veterinarians remains individual
animal examinations but this must be supplemented with systematic herd
fertility investigation and veterinarian-led herd fertility management (as
Farm manager)
 Management of reproductive and productive cycles
 AI packages
 Use of cow-side diagnostic tests/rapid tests is paramount for herd health
management
 Adopt and Adapt Farm Manager’s Reproduction Management Tools
nyabipass@gmail.com
23
nyabipass@gmail.com

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Dr Pascal_Reproductive disorders and their management.pdf

  • 1. Reproductive disorders and their management in cattle Dr. Pascal Nyabinwa, PhD Senior Research Fellow RAB Tel. (+250) 785324631 E-mail: nyabipass@gmail.com ORCID iD. https://orcid.org/0000-0001-8568-7910 1 nyabipass@gmail.com
  • 2. Presentation outline 1. Anatomy of cow reproductive tract (recall) 2. Artificial Insemination (AI) procedures (Recall) 3. Reproductive and productive cycles (cows) 4. Reproductive diseases and periods of occurrence 5. Risk factors 6. Effect of disease on reproductive performance in dairy cows 7. Vicious cycle of low AI success rate and low adoption rate 8. Fertility chain and Equation of reproduction 9. Management interventions for control and prevention of reproductive disease in a dairy farm 10. Management of uterine infections (key TTT) 11. Cow-side diagnostic tests/rapid tests 12. Farm Manager’s Reproduction Management Tools 13. Take-home message 2 nyabipass@gmail.com
  • 4. 4 AI procedures 1.Outer procedures Level 1- Heat detection (or call from farmer under AM-PM rule) Level 2- AI’s equipment identification, preparation and handling Level 3- Semen identification, preparation and handling Level 4- Cow’s preparation and hygiene Level 5- Get the gun to the cervix Level 6-Place the cervix over the gun Level 7-Deposit the semen just through the cervix into the uterine body 2. Inner procedures Level 9- Better record keeping Level 8-Disposal single use materials in Dustbin Level-10- Calving Level 11- Calf registration nyabipass@gmail.com
  • 6. Dry off Calving Transition period AI Gestation Disease Mastitis Milk fever Dystocia Uterine prolapse Twin calving Stillbirth Retained placenta Left displaced abomasum Ketosis/acetonemia Metritis Endometritis Uterine involution (late) Lameness & Brucellosis Cyst Postpartum anoestrus Embryonic mortality Abortion 6 Some reproductive diseases and period of occurrence nyabipass@gmail.com
  • 8. 0 1 4 4 6 10 11 27 48 69 166 0 50 100 150 200 250 Left displaced abomasum Ketosis Uterine prolapse Twin calving Milk fever Metritis Endometritis Stillbirth Retained placenta Mastitis Dystocia Prevalence of postpartum clinical diseases of dairy cows (n = 250) Postpartum diseases Number of affected cows Percentage prevalence (%) Uterine diseases Metritis 10 4.4 Endometritis 11 4.4 Retained placenta 48 19.2 Uterine prolapse 4 1.6 Non-uterine diseases Mastitis 69 27.6 Ketosis/Acetonemia 1 0.4 Left displaced abomasum 0 0 Milk fever/post parturition paresis 6 2.4 Calving problems Twin calving 4 1.6 Stillbirth 27 10.8 Dystocia 166 66.4 Uterine prolapse Retained placenta Endo/metritis Mastitis Dystocia 8 nyabipass@gmail.com
  • 9. Herd-level RFs associated with reproductive disease in dairy cows. Cow-level RFs associated with reproductive disease in dairy cows. 9 BCS<3 nyabipass@gmail.com
  • 11. Mastitis Endometritis Effect of disease on reproductive performance in dairy cows 11 nyabipass@gmail.com
  • 12. CHARACTERISTICS OF MOST AFRICAN COUNTRY DAIRY SECTORS Vicious cycle of low adoption and high cost of production Higher prevalence of TBDs among other diseases discouraging adoption of improved breeds 12 Vicious cycle of low productivity and low investment in dairy Vicious cycle of low AI success rate and low adoption rate nyabipass@gmail.com
  • 14.  The use of AI can also be seen as a chain of events - from the collection of semen from a bull to the birth of a calf (records).  To be successful in AI work, no failures can be tolerated anywhere since each link in this chain of events is of equal importance  All the links in the chain should be strong enough to strengthen the whole chain, as one weak link (Weakest link) results in no conception, most likely to the extent it will cancel many of the benefits the AI technology offers 14 nyabipass@gmail.com
  • 15. Applying the equation of reproduction 15 % pregnancy = CDHI x IE x FLH x SFL Herd A CDHI = 0.95 IE = 1 FLH = 0.9 SFL = 0.95 % Pregnancies from AI =?? Herd B CDHI = 0.95 IE = 0.60 FLH = 0.90 SFL = 0.95 % Pregnancies from AI =?? In ideal situation such as the Herd A, all four factors are very high. The result is a relatively high percent of pregnancies from AI during that time period Herd B where a low % of IE (60%). All other factors remain ideal. Because of that one low factor, the % of pregnancies from AI is lowered from 81.2% to 48.7%. This specific example emphasizes how important it is to keep every % as high as possible nyabipass@gmail.com
  • 16. SN Management interventions (MIs) 1 Avoid equipment-sharing between cows within the farm 2 Avoid equipment-sharing with neighbouring farms 3 Avoid housing fresh cows with diseased cows or those with chronic illnesses such as mastitis 4 Avoid off-farm bedding materials and maintain adequate bedding materials per cow 5 Avoid sharing or hiring a breeding bull 6 Consult ANHS provider about the treatment and prevention of mastitis and metabolic diseases 7 Consult ANHS providers about the treatment of positive cases 8 Cull of persistently positive cows 9 Disinfect equipments used in calving assistance before and after use 10 Keep the cows in a clean and dry shed 11 Maintain adequate feeding per cow 12 Maintain a clean transition cow housing 13 Maintain regular contact with ANHS providers for advisory support on disease prevention in dairy farm 14 Select sires based on calving ease 15 Select sires based on low percent stillbirths 16 Remove fetal membranes immediately after passing 17 Use gloves during calving assistance 18 Use an artificial insemination service 19 Use a sexed semen during artificial insemination service 20 Wash the hands and udder before each milking Management interventions for control and prevention of reproductive disease in a dairy farm Source: 16 nyabipass@gmail.com
  • 17. • Management of uterine infections Cephapirin benzathine nyabipass@gmail.com 17
  • 18. Proposed decision tree for the treatment of uterine infections in cows Day > 21 pp - Check for size consistence and contents of the uterus and presence of vaginal/cervical discharge/add lab methods if in doubt No CL on the ovary Presence of CL on the ovary Intrauterine antibiotic (e.g. Metricure: Cephapirin benzathine ) PGF2a i.m. (e.g. Estrumate/Enzaprost; 2ml) 72h later – intrauterine antibiotic (e.g. Metricure) Uterine infections confirmed nyabipass@gmail.com 18
  • 19. Cow-side diagnostics Use of rapid health information to manage the herd 19  CMT MASTITIS DETECTION  ENDO/METRITIS SCORES (METRICHECK TOOL) ENDO/METRITIS DETECTION  ON-FARM PREGNANCY TESTS (ALERTYS*, P4 Rapid test, ….) • Early Pregnancy diagnosis (Blood, Serum, Plasma, Milk) • Cows in their estrous cycle  Hypocalcemia/ketosis rapid tests nyabipass@gmail.com
  • 20. 1. Cattle Gestation Table based on 283 Days Gestation Period 20 2. Cows calendar Farm Manager’s Reproduction Management Tools nyabipass@gmail.com
  • 21. 21 Farm Manager’s Reproduction Management Tools (Cont’d) 3. Online Apps a. Cow Pregnancy Calculator b. Cattle Gestation and Body Weight Calculator nyabipass@gmail.com
  • 22. Take-home message 22  The core role of dairy veterinarians remains individual animal examinations but this must be supplemented with systematic herd fertility investigation and veterinarian-led herd fertility management (as Farm manager)  Management of reproductive and productive cycles  AI packages  Use of cow-side diagnostic tests/rapid tests is paramount for herd health management  Adopt and Adapt Farm Manager’s Reproduction Management Tools nyabipass@gmail.com