Foundation · 12 min · Topic universe
Mastitis pathways
Almost every intramammary infection walks in through the teat canal. See contagious versus environmental paths before you blame the tank.
The system
Schematic quarter · not a specimen
Field notes
Short articles on this topic
Two to four minutes. The weekly unit an agent can add without rebuilding the system.
3 min · 2026-09-07
Name the reservoir first
Contagious and environmental mastitis fail different jobs. Mixing them wastes a year.
Read the note3 min · 2026-09-07
The teat end is the gate
A cracked or over-milked teat end is an open door, even with a pretty dip bottle.
Read the note
The numbers
Benchmarks, not a ration
Ranges from extension and textbooks. Use them to read the cow, not to write a formula.
Usual entry route
Teat canal
Merck: with few exceptions, organisms enter through the teat canal. Teach the door, not a mysterious blood-borne story.
Mastitis in Cattle — Merck Veterinary ManualContagious move at
Milking
Hands, towels, and liners. Adult lactating cows are the main reservoir for most contagious pathogens.
Mastitis in Cattle — Merck Veterinary ManualEnvironmental reservoir
Bedding and manure
Stalls, mud, and dirty water matter as much as the parlor when coliforms and many streptococci are the problem.
Mastitis in Cattle — Merck Veterinary Manual
Spot it
What you see · what it means · what to check
Check yourself
Five questions from this universe
1 of 5
How do most mastitis organisms enter the gland?
Sources
- Mastitis in Cattle — Merck Veterinary Manual
- Recommended Mastitis Control Program — National Mastitis Council
System figures are educational plates drawn from public-domain veterinary teaching anatomy (udder, claw, uterus, and housing relationships). They are not scanned specimens. Educational only.
Not a veterinary diagnosis, prescription, or ration formula.