What is Dr. Zubair Khalid's research focus?

Dr. Zubair Khalid specializes in molecular virology, mRNA vaccine development, and computational biology, with a focus on avian pathogens like IBDV and Avian Reovirus.

Where is Dr. Zubair Khalid currently working?

Dr. Zubair Khalid is a Postdoctoral Research Associate at the University of Maryland (UMD), specifically within the Department of Animal and Avian Sciences.

Traumatic Reticuloperitonitis (Hardware Disease) in Cattle: Diagnosis, Treatment, and Prevention

Traumatic reticuloperitonitis, commonly called hardware disease, occurs when cattle ingest sharp metallic objects that penetrate the reticulum wall, causing local or diffuse peritonitis. This condition requires prompt veterinary assessment to differentiate from other causes of abdominal pain and to determine whether medical management or surgical intervention is indicated. The following content provides veterinarians and cattle producers with evidence-based guidance on clinical recognition, diagnostic confirmation, treatment options, and prevention strategies.

At a Glance

Clinical Feature	Medical Management Candidate	Surgical Candidate
Rectal temperature	Mild elevation (39.0-39.5°C)	Moderate to high fever (>39.5°C)
Rumen motility	Reduced but present	Absent or severely depressed
Response to pain test	Positive grunt on withers pinch or brisket percussion	Positive grunt with marked guarding
Peritoneal fluid analysis	Elevated protein, moderate nucleated cell count	Marked elevation in protein and cells, possible bacteria
Radiographic findings	No visible penetration or localized reaction	Visible foreign body penetrating reticulum or migrating
Time since onset	<48 hours with stable vital signs	>48 hours or deteriorating despite medical therapy

Pathophysiology and Risk Factors

Mechanism of Foreign Body Ingestion

Cattle do not discriminate feed materials effectively and often consume metallic objects mixed into feedstuffs or lying in pastures. Common foreign bodies include nails, wire fragments, staples, screws, and pieces of fencing material. The Merck Veterinary Manual describes how these objects settle in the reticulum due to its honeycomb structure and ventral position within the abdominal cavity. Reticular contractions during digestion can drive sharp objects through the wall, initiating an inflammatory response.

Progression from Local Inflammation to Diffuse Peritonitis

When a foreign body penetrates the reticulum, the initial response is localized inflammation and fibrin deposition. If the object remains embedded, the body may wall off the area with adhesions. However, continued reticular contractions can drive the object deeper, leading to diffuse peritonitis. The World Organisation for Animal Health (WOAH) recognizes traumatic reticuloperitonitis as a significant cause of production loss and animal welfare compromise in cattle operations worldwide. In severe cases, the object may migrate to the pericardium, liver, spleen, or thoracic cavity, causing complications such as traumatic pericarditis or hepatic abscessation.

Common Failure Patterns in Prevention

Operations that fail to screen feed materials or maintain pasture hygiene frequently experience recurrent cases. Producers who rely solely on rumen magnets without addressing feed contamination sources often see continued disease incidence. The Diagnosis and Treatment of Hardware Disease article in The Veterinary Clinics of North America: Food Animal Practice emphasizes that prevention requires a comprehensive approach combining feed management, magnet administration, and regular facility inspection.

Clinical Recognition and Initial Assessment

Observation of Behavioral Changes

Affected cattle typically show reduced feed intake, reluctance to move, arched back posture, and grunting on expiration. Producers may notice the animal standing with elbows abducted and head extended. These signs result from pain associated with reticular contractions and peritoneal inflammation. The Clinical Diagnosis of Foot and Leg Lameness in Cattle article in The Veterinary Clinics of North America: Food Animal Practice notes that lameness can sometimes be confused with hardware disease, as both conditions cause altered gait and reluctance to move. Careful observation of posture and response to handling helps differentiate these conditions.

Physical Examination Findings

Veterinarians should perform a systematic examination including:

Rectal temperature measurement
Heart rate and respiratory rate assessment
Rumen motility evaluation through auscultation and palpation
Abdominal auscultation for pings or fluid sounds
Pain response testing via withers pinch, brisket percussion, and deep abdominal palpation

The presence of a positive grunt on withers pinch or brisket percussion is a classic finding but is not pathognomonic. Other conditions causing abdominal pain, such as abomasal displacement or peritonitis from other causes, can produce similar responses.

Differential Diagnoses

Conditions that mimic hardware disease include:

Abomasal displacement or volvulus
Intestinal obstruction or intussusception
Acute ruminal acidosis
Peritonitis from uterine rupture or perforating abomasal ulcer
Liver abscessation
Pneumonia with pleural pain

The Causes of Mortality of Dairy Cattle Diagnosed by Complete Necropsy article in Animals journal highlights that accurate diagnosis requires systematic evaluation, as misdiagnosis leads to inappropriate treatment and poor outcomes.

Diagnostic Confirmation

Peritoneal Fluid Analysis

Abdominocentesis provides valuable diagnostic information. Fluid should be collected from the most dependent portion of the ventral abdomen, typically to the right of the midline. Normal peritoneal fluid is clear to straw-colored with low protein concentration and few nucleated cells. In hardware disease, fluid becomes turbid with elevated protein and nucleated cell counts. The presence of bacteria on cytology indicates septic peritonitis and warrants aggressive intervention.

Radiographic Examination

Standing lateral radiography of the cranial abdomen can reveal metallic foreign bodies and assess their position relative to the reticulum. The Merck Veterinary Manual describes how radiographs may show the object within the reticulum, penetrating the wall, or migrating into surrounding tissues. Gas shadows within the reticulum or peritoneal cavity suggest perforation and peritonitis. Radiography is most useful when performed early in the disease course, as chronic cases may have extensive adhesions that obscure findings.

Ultrasonography

Transabdominal ultrasound allows visualization of the reticulum, detection of fluid pockets, and assessment of adhesion formation. The reticulum appears as a curved structure with visible contractions. In hardware disease, the reticular wall may appear thickened, and echogenic fibrin strands or fluid pockets may be visible. Ultrasound is particularly useful for guiding abdominocentesis and assessing response to treatment.

Hematology and Acute Phase Proteins

Complete blood count often reveals leukocytosis with left shift and elevated fibrinogen. Serum amyloid A and haptoglobin concentrations increase in response to inflammation. While these findings support a diagnosis of peritonitis, they are not specific to hardware disease and must be interpreted alongside other diagnostic information.

Treatment Options and Decision Making

Medical Management

Medical therapy is appropriate for cases with localized peritonitis, stable vital signs, and no evidence of foreign body migration. Treatment includes:

Broad-spectrum antimicrobial therapy targeting gram-negative and anaerobic bacteria
Nonsteroidal anti-inflammatory drugs for pain control and inflammation reduction
Administration of a rumen magnet to secure the foreign body
Supportive care including fluid therapy and nutritional support

The Diagnosis and Treatment of Hardware Disease article in The Veterinary Clinics of North America: Food Animal Practice provides guidance on case selection for medical management. Animals that fail to improve within 48 to 72 hours require reassessment and consideration of surgical intervention.

Rumen Magnet Administration

Magnets are administered orally using a balling gun or magnet retriever. The magnet settles in the reticulum and attracts ferrous foreign bodies, reducing the risk of penetration. The Duodenal Ileus Caused by a Cage Magnet in a Fleckvieh Cow article in Tierarztliche Praxis describes a rare complication where a cage magnet caused duodenal obstruction. This case highlights the importance of proper magnet selection and administration technique. Producers should use magnets designed for cattle and follow manufacturer instructions for administration.

Surgical Intervention

Rumenotomy is indicated when:

Medical therapy fails to produce improvement within 48 to 72 hours
Radiography or ultrasound reveals a foreign body penetrating the reticulum or migrating
Septic peritonitis is confirmed on fluid analysis
The animal develops signs of traumatic pericarditis or other complications

Surgery is performed under local anesthesia with the animal standing. The rumen is opened through a left flank approach, and the reticulum is explored manually. The foreign body is removed, and the reticulum is examined for additional objects. The peritoneal cavity is lavaged if peritonitis is present. Postoperative care includes antimicrobial therapy, anti-inflammatory drugs, and gradual reintroduction of feed.

Prognostic Factors

Factors associated with favorable outcome include:

Early diagnosis and treatment
Localized peritonitis without systemic involvement
Successful retrieval of the foreign body
No complications such as pericarditis or liver abscessation

Factors associated with poor prognosis include:

Diffuse peritonitis with systemic signs
Migration of the foreign body to the pericardium or thoracic cavity
Delayed treatment beyond 72 hours
Presence of multiple foreign bodies or extensive adhesions

Records and Measurements

Individual Animal Records

For each suspected or confirmed case, maintain records including:

Animal identification number and age
Date of onset and clinical signs observed
Rectal temperature, heart rate, respiratory rate, and rumen motility at initial examination
Results of diagnostic tests including peritoneal fluid analysis, radiography, and ultrasound
Treatment administered including antimicrobials, anti-inflammatory drugs, and magnet administration
Response to treatment and any complications
Outcome including recovery, culling, or death

Herd-Level Records

Track herd-level data to identify risk factors and evaluate prevention effectiveness:

Number of cases per year by age group and production stage
Seasonal patterns of disease occurrence
Source of feed materials associated with cases
Magnet administration rates and timing
Results of feed screening programs

The Invited Review: Cattle Lameness Detection with Accelerometers article in Journal of Dairy Science discusses how automated monitoring systems can detect behavioral changes associated with illness. While this review focuses on lameness, similar principles apply to detecting hardware disease through changes in feeding behavior, activity levels, and rumination time.

Prevention Strategies

Feed Management

Prevention begins with feed management. Steps include:

Inspecting feed materials for metallic contaminants before mixing or feeding
Using magnetic separators on feed processing equipment
Avoiding feeding on ground that contains debris from construction or fencing
Regularly inspecting pastures and lots for discarded metal objects
Maintaining fences and equipment to prevent loose hardware

Rumen Magnet Administration

Administer rumen magnets to all cattle at appropriate life stages. The Merck Veterinary Manual recommends magnet administration to heifers before first calving and to all adult cattle annually. Magnets should be administered using proper technique to ensure placement in the reticulum. Producers should verify magnet retention through periodic checking with a compass or metal detector.

Facility Maintenance

Regular inspection and maintenance of facilities reduces the risk of hardware contamination:

Inspect feed bunks, water troughs, and handling facilities for loose hardware
Remove debris from pastures and lots before grazing
Secure fencing materials to prevent loose wire or nails
Use metal detectors to screen feed materials when contamination is suspected

Common Failure Patterns in Prevention

Operations that experience recurrent hardware disease often share common deficiencies:

Inconsistent magnet administration programs
Reliance on magnets alone without feed screening
Failure to inspect feed materials from new suppliers
Inadequate pasture and lot maintenance
Lack of record keeping to identify contamination sources

Welfare and Safety Context

Animal Welfare Implications

Hardware disease causes significant pain and distress. The World Organisation for Animal Health (WOAH) includes peritonitis as a condition requiring prompt veterinary attention to minimize suffering. Delayed diagnosis or inadequate treatment prolongs pain and increases the risk of complications. Producers have a responsibility to monitor cattle for signs of illness and seek veterinary care when indicated.

Human Safety Considerations

Veterinarians and producers handling affected cattle should be aware of safety risks:

Cattle with abdominal pain may kick or strike when handled
Rumenotomy carries risks of rumen content spillage and wound contamination
Needle sticks during abdominocentesis or drug administration pose infection risks
Proper restraint and handling protocols reduce injury risk

Professional Escalation Criteria

Veterinarians should escalate care or refer cases when:

The animal fails to improve within 48 hours of medical therapy
Septic peritonitis is confirmed on fluid analysis
Radiography or ultrasound reveals foreign body migration
Signs of traumatic pericarditis develop, such as muffled heart sounds or jugular distention
The animal becomes recumbent or develops severe systemic signs

Practical Decision Framework for Traumatic Reticuloperitonitis Management

Clinical Decision Algorithm for Treatment Selection

The decision to pursue medical management versus surgical intervention requires systematic evaluation of multiple clinical parameters. The Diagnosis and Treatment of Hardware Disease article in The Veterinary Clinics of North America: Food Animal Practice provides a framework for case selection based on disease severity and progression. The following algorithm guides veterinarians through the decision process using observable clinical findings and diagnostic results.

Step 1: Initial Triage and Stabilization

When a cow presents with suspected hardware disease, begin with immediate assessment of vital signs and pain response. Measure rectal temperature, heart rate, respiratory rate, and rumen motility. Perform withers pinch and brisket percussion tests to evaluate pain response. Record these findings before administering any medications that could mask clinical signs.

Cows with rectal temperature below 39.5 degrees Celsius, heart rate below 80 beats per minute, and detectable rumen motility are candidates for medical management. Cows with temperature above 39.5 degrees Celsius, heart rate above 90 beats per minute, and absent rumen motility require more aggressive intervention.

Step 2: Diagnostic Confirmation

Collect peritoneal fluid for analysis. Submit samples for protein concentration, nucleated cell count, and cytology. The Merck Veterinary Manual describes normal peritoneal fluid as clear to straw-colored with protein concentration below 2.5 grams per deciliter and nucleated cell count below 5000 cells per microliter. In hardware disease, protein concentration exceeds 3.0 grams per deciliter and nucleated cell count exceeds 10000 cells per microliter.

Perform standing lateral radiography of the cranial abdomen. Identify metallic foreign bodies and assess their position relative to the reticulum. Gas shadows within the reticulum or peritoneal cavity indicate perforation. Ultrasound examination provides additional information about reticular wall thickness, adhesion formation, and fluid pockets.

Step 3: Treatment Selection Based on Findings

Use the following criteria to select treatment approach:

Medical management candidates meet all of the following criteria:

Rectal temperature below 39.5 degrees Celsius
Heart rate below 80 beats per minute
Detectable rumen motility
Positive grunt on pain testing but no guarding
Peritoneal fluid protein below 4.0 grams per deciliter
No visible foreign body penetration on radiography
Onset of signs within 48 hours

Surgical candidates meet any of the following criteria:

Rectal temperature above 39.5 degrees Celsius
Heart rate above 90 beats per minute
Absent rumen motility
Positive grunt with marked abdominal guarding
Peritoneal fluid protein above 4.0 grams per deciliter with bacteria present
Visible foreign body penetrating reticulum on radiography
Failure to improve within 48 hours of medical therapy

Step 4: Monitoring and Reassessment

For cows managed medically, reassess vital signs and pain response every 12 hours. Record rectal temperature, heart rate, respiratory rate, and rumen motility at each assessment. Repeat peritoneal fluid analysis at 48 hours if clinical improvement is not evident.

Cows that show improvement within 48 hours typically have rectal temperature returning toward normal, heart rate decreasing, and rumen motility improving. Cows that fail to improve or deteriorate require surgical intervention.

Record System for Treatment Monitoring

Individual Cow Treatment Record

Create a standardized record for each suspected or confirmed case. Include the following fields:

Animal identification number
Date and time of initial examination
Presenting clinical signs
Rectal temperature at initial examination
Heart rate at initial examination
Respiratory rate at initial examination
Rumen motility score (0 = absent, 1 = reduced, 2 = normal)
Pain response score (0 = negative, 1 = positive grunt, 2 = positive with guarding)
Peritoneal fluid protein concentration
Peritoneal fluid nucleated cell count
Peritoneal fluid cytology findings
Radiography findings
Ultrasound findings
Treatment administered (antimicrobials, anti-inflammatory drugs, magnet)
Date and time of treatment administration
Reassessment findings at 12, 24, 36, and 48 hours
Outcome (recovered, surgery performed, culled, died)

Herd-Level Surveillance Record

Maintain a herd-level record to track disease patterns and evaluate prevention effectiveness. Include the following fields:

Date of each case
Animal identification number
Age group (heifer, first lactation, second lactation, mature)
Production stage (dry, fresh, peak lactation, late lactation)
Feed source at time of onset
Pasture or lot location
Magnet administration history
Treatment outcome
Necropsy findings if applicable

Troubleshooting Method for Non-Responsive Cases

Case Scenario 1: Cow Fails to Improve Within 48 Hours of Medical Therapy

When a cow shows no improvement after 48 hours of medical management, reassess the following factors:

First, verify that the diagnosis is correct. Repeat physical examination and pain response testing. Collect peritoneal fluid for repeat analysis. Perform radiography or ultrasound if not done previously. Consider alternative diagnoses such as abomasal displacement, intestinal obstruction, or liver abscessation.

Second, evaluate the adequacy of antimicrobial therapy. Confirm that appropriate antimicrobials were administered at correct doses and intervals. The Diagnosis and Treatment of Hardware Disease article in The Veterinary Clinics of North America: Food Animal Practice emphasizes that antimicrobial selection should target gram-negative and anaerobic bacteria commonly involved in peritonitis.

Third, assess whether the foreign body has migrated or caused complications. Repeat radiography may reveal foreign body movement. Ultrasound may detect abscess formation or pericardial involvement. The Causes of Mortality of Dairy Cattle Diagnosed by Complete Necropsy article in Animals journal identifies traumatic pericarditis as a common complication of hardware disease that carries a poor prognosis.

Fourth, consider surgical intervention. Cows that fail to improve within 48 hours of medical therapy are unlikely to recover without surgery. Rumenotomy allows direct visualization and removal of the foreign body and assessment of the peritoneal cavity.

Case Scenario 2: Cow Develops Recurrent Hardware Disease

When a cow has multiple episodes of hardware disease, investigate the following factors:

First, verify that a rumen magnet is present and functioning. Use a compass or metal detector to confirm magnet retention. The Duodenal Ileus Caused by a Cage Magnet in a Fleckvieh Cow article in Tierarztliche Praxis describes a rare complication where a cage magnet caused duodenal obstruction. While this complication is uncommon, it highlights the importance of proper magnet selection and administration technique.

Second, evaluate feed management practices. Inspect feed materials for metallic contaminants. Check magnetic separators on feed processing equipment for proper function. Review feed sources and suppliers for contamination history.

Third, assess facility maintenance. Inspect feed bunks, water troughs, and handling facilities for loose hardware. Examine pastures and lots for discarded metal objects. Review fencing materials for loose wire or nails.

Fourth, consider environmental factors. Construction projects near cattle facilities increase the risk of hardware contamination. Recent fencing repairs or building maintenance may introduce metallic debris.

Case Scenario 3: Herd Experiences Multiple Cases in Short Time Period

When multiple cases occur within a short time frame, conduct a herd-level investigation:

First, identify common risk factors. Review records for feed sources, pasture locations, and facility conditions associated with cases. Look for temporal patterns such as cases occurring after feed delivery or facility maintenance.

Second, inspect feed materials from all sources. Use magnetic separators to screen feed for metallic contaminants. Collect feed samples for visual inspection and metal detection.

Third, evaluate magnet administration protocols. Verify that all cattle have received magnets at appropriate intervals. Check magnet retention rates using compass or metal detector surveys.

Fourth, implement enhanced prevention measures. Increase frequency of feed screening. Install additional magnetic separators. Conduct facility inspections and repairs. Consider administering magnets to all cattle if administration rates are low.

Common Failure Patterns in Treatment and Prevention

Failure Pattern 1: Delayed Diagnosis

Producers who wait for obvious clinical signs before seeking veterinary care often present animals with advanced disease. The Clinical Diagnosis of Foot and Leg Lameness in Cattle article in The Veterinary Clinics of North America: Food Animal Practice notes that early detection of lameness improves treatment outcomes. The same principle applies to hardware disease. Producers should monitor cattle for subtle signs such as reduced feed intake, decreased rumination, and mild depression.

Failure Pattern 2: Inadequate Antimicrobial Therapy

Veterinarians who prescribe antimicrobials without considering the specific pathogens involved in peritonitis may achieve poor treatment outcomes. The Diagnosis and Treatment of Hardware Disease article in The Veterinary Clinics of North America: Food Animal Practice emphasizes that antimicrobial selection should target gram-negative and anaerobic bacteria. Inadequate dosing or premature discontinuation of therapy also contributes to treatment failure.

Failure Pattern 3: Reliance on Magnets Alone

Producers who rely solely on rumen magnets without addressing feed contamination sources often see continued disease incidence. Magnets reduce the risk of hardware disease but do not eliminate it. The Merck Veterinary Manual describes how magnets attract ferrous foreign bodies but may not prevent penetration if the object is non-ferrous or if multiple objects are present.

Failure Pattern 4: Inconsistent Magnet Administration

Operations that administer magnets sporadically or only to certain age groups experience higher disease rates. The Merck Veterinary Manual recommends magnet administration to heifers before first calving and to all adult cattle annually. Producers should maintain records of magnet administration and verify retention through periodic checking.

Failure Pattern 5: Failure to Escalate Care

Veterinarians who continue medical management beyond 48 hours without improvement risk poor outcomes. The Diagnosis and Treatment of Hardware Disease article in The Veterinary Clinics of North America: Food Animal Practice provides guidance on case selection for medical management. Animals that fail to improve within 48 to 72 hours require reassessment and consideration of surgical intervention.

Professional Escalation Criteria

Veterinarians should escalate care or refer cases when:

The animal fails to improve within 48 hours of medical therapy
Septic peritonitis is confirmed on fluid analysis with bacteria present
Radiography or ultrasound reveals foreign body migration beyond the reticulum
Signs of traumatic pericarditis develop, such as muffled heart sounds, jugular distention, or brisket edema
The animal becomes recumbent or develops severe systemic signs including tachycardia, tachypnea, and dehydration
Multiple foreign bodies are identified on imaging
The animal has a history of recurrent hardware disease despite appropriate prevention measures

The World Organisation for Animal Health (WOAH) includes peritonitis as a condition requiring prompt veterinary attention to minimize suffering. Delayed escalation of care prolongs pain and increases the risk of complications. Veterinarians should have established referral relationships with facilities capable of performing rumenotomy and providing intensive postoperative care.

Welfare and Safety Context for Decision Making

Animal Welfare Implications of Treatment Decisions

The decision to pursue medical management versus surgical intervention has direct welfare implications. Medical management avoids the stress and pain of surgery but may prolong suffering if the foreign body continues to cause pain and inflammation. Surgical intervention provides definitive treatment but carries risks of anesthesia, wound complications, and postoperative pain.

The World Organisation for Animal Health (WOAH) recognizes traumatic reticuloperitonitis as a significant cause of production loss and animal welfare compromise in cattle operations worldwide. Producers and veterinarians have a responsibility to select the treatment approach that minimizes overall suffering while achieving the best possible outcome.

Human Safety Considerations During Treatment

Veterinarians and producers handling affected cattle should be aware of safety risks:

Cattle with abdominal pain may kick or strike when handled, particularly during abdominal palpation or abdominocentesis
Rumenotomy carries risks of rumen content spillage and wound contamination, requiring proper surgical technique and wound management
Needle sticks during abdominocentesis or drug administration pose infection risks, particularly when handling animals with septic peritonitis
Proper restraint and handling protocols reduce injury risk, including use of head gates, squeeze chutes, and sedation when necessary

Economic Considerations in Treatment Decisions

The economic value of the animal influences treatment decisions. High-value dairy cows or breeding stock may justify surgical intervention even when prognosis is guarded. Lower-value animals may be candidates for medical management or culling if treatment costs exceed animal value.

Producers should consider the following economic factors:

Cost of medical management including antimicrobials, anti-inflammatory drugs, and magnet administration
Cost of surgical intervention including veterinary fees, anesthesia, and postoperative care
Expected milk production loss during treatment and recovery
Risk of complications and associated costs
Carcass value if treatment fails and animal is culled

The Diagnosis and Treatment of Hardware Disease article in The Veterinary Clinics of North America: Food Animal Practice provides guidance on case selection that considers both medical and economic factors. Veterinarians should discuss treatment options and expected outcomes with producers to make informed decisions.

Practical Decision Framework for Traumatic Reticuloperitonitis Management

Clinical Decision Algorithm for Treatment Selection

Step 1: Initial Triage and Stabilization

Step 2: Diagnostic Confirmation

Step 3: Treatment Selection Based on Findings

Use the following criteria to select treatment approach:

Medical management candidates meet all of the following criteria:

Rectal temperature below 39.5 degrees Celsius
Heart rate below 80 beats per minute
Detectable rumen motility
Positive grunt on pain testing but no guarding
Peritoneal fluid protein below 4.0 grams per deciliter
No visible foreign body penetration on radiography
Onset of signs within 48 hours

Surgical candidates meet any of the following criteria:

Rectal temperature above 39.5 degrees Celsius
Heart rate above 90 beats per minute
Absent rumen motility
Positive grunt with marked abdominal guarding
Peritoneal fluid protein above 4.0 grams per deciliter with bacteria present
Visible foreign body penetrating reticulum on radiography
Failure to improve within 48 hours of medical therapy

Step 4: Monitoring and Reassessment

Record System for Treatment Monitoring

Individual Cow Treatment Record

Create a standardized record for each suspected or confirmed case. Include the following fields:

Animal identification number
Date and time of initial examination
Presenting clinical signs
Rectal temperature at initial examination
Heart rate at initial examination
Respiratory rate at initial examination
Rumen motility score (0 = absent, 1 = reduced, 2 = normal)
Pain response score (0 = negative, 1 = positive grunt, 2 = positive with guarding)
Peritoneal fluid protein concentration
Peritoneal fluid nucleated cell count
Peritoneal fluid cytology findings
Radiography findings
Ultrasound findings
Treatment administered (antimicrobials, anti-inflammatory drugs, magnet)
Date and time of treatment administration
Reassessment findings at 12, 24, 36, and 48 hours
Outcome (recovered, surgery performed, culled, died)

Herd-Level Surveillance Record

Maintain a herd-level record to track disease patterns and evaluate prevention effectiveness. Include the following fields:

Date of each case
Animal identification number
Age group (heifer, first lactation, second lactation, mature)
Production stage (dry, fresh, peak lactation, late lactation)
Feed source at time of onset
Pasture or lot location
Magnet administration history
Treatment outcome
Necropsy findings if applicable