This document describes 18 diseases or conditions that affect horses: 1. Salmonellosis 2. Clostridial disease 3. Tuberculosis 4. Strangles 5. Guttural pouch empyema 6. Purpura hemorrhagica 7. Glanders 8. Botulism 9. Tetanus 10. Rhodococcus equi 11. Actinobacillus equuli 12. Anthrax 13. Ulcerative lymphangitis 14. Staph dermatitis 15. Dermatophilosis 16. Chest abscess 17. Necrobacillosis 18. Mastitis

1. .Salmonellosis -1
.Clostridial disease -2
.Tuberculosis -3
.Strangles -4
.Guttural pouch empyema -5
.Purpura hemorrhagica -6
.Glanders -7
.Botulism -8
.Tetanus -9
.Rodococcus equi -10
.Actinobacillus equuli -11
.Anthrax -12
.Ulcerative lymphangitis -13
.Staph dermatitis -14
.Dermatophilosis -15
.Chest abscess -16
.Necrobacillosis -17
.Mastitis -18

2. Profuse dark diarrhea over wall of
stable. Diarrhea contained blood and
.shreds of intestinal mucosa Profuse diarrhea,
often with blood
and shreds of
mucosa

3. Very limited area of distal jejunum and Extensive severe inflammation of
proximal ileum affected with hemorrhagic jejunum which is not distended.
inflammation Proximal distension )portion held(
and normal large colon
Well defined patches of
compromised small intestinal
)wall )arrow

4. Granulomatous lesion in wall of ileum
Bilateral purulent
hemorrhagic nasal
discharge

5. Bilateral purulent nasal Bilateral mucopurulent
)discharge )with blood nasal discharge
Ruptured
pharyngeal lymph
node
Massive pharyngeal and Bastered Strangles, pharyngeal
submandibular swelling, discharging abscesses,
lymphadenopathy weight loss, abducted elbow
associated with dyspnea and ventral
edema

6. Bastered
Strangles,
extensive
Massive pulmonary
pharyngeal and abscess with
submandibular multiple
lymphadenopathy compartments
and thick fibrous
reaction
Endoscopic view of
pharynx difference in
discharge from
guttural pouches
indicating time
difference to rupture
of pharyngeal abscess
Bastered Strangles, in guttural pouches.
hypopyon with Discharge from left
minimal corneal pouch is older than
involvement right

7. Swelling ) non tympanic( below Endoscopic view,chondroids
tendon of insertion of )inspissated and tumbled
sternocephalicus m. purulent material. Generalized
diverticulitis with loss of
detailed structure such as
blood vessels on mucosa
Endoscopic view, caseated,
purulent material on floor of
medial compartment. Some
loss of surface detail

8. Endoscopic view, purulent
discharge from pharyngeal
ostium of left pouch )arrow(.
Endoscopic view, very liquid Marked dorsal pharyngeal
contents, generalized .compression
diverticulitis with loss of
normally obvious detalid
anatomical features such as
blood vessels and nerves

9. Sharply
Bilateral
demarcated
hemorrhagic
edema of fore
nasal
limb at level
discharge
of elbow
.))arrow
Bilateral
venous
epistaxis
Petechial hemorrhages
in vaginal m.m

10. Chains of
ulcerated
lymphatic
nodules
Chains of ulcerated,
discharging nodules
Bilateral purulent
following lymphatic
hemorrhagic
versals
nasal discharge
)scanty( with fetid
odor

11. Tongue withdrawal absent

12. Opisthotonus
and extensor
rigidity of
neck, limbs,
trunk and tail
Tail )hand pump( head elevation.
Horse showed stiff and stilted gait
Fixed, alert facial
expression, erect
ears, prolapsed
third eye lid,
nostrils drawn
open and tense
Prolapsed third eye lid and mouth
enophthalmos in response
to sudden noise and when
)face is tapped with a finger

13. Miliary abscesses on Large numbers of abscesses
the lung lesions in lung parenchyma
Foal presented with
severe diarrhea. Large
numbers of abscesses
in mesentery and lymph
nodes of colon and
cecum

14. Neonatal septicemia, Five day old foal with sign of
generalized petechiation of neonatal septicemia, aqueous
all body surfaces including flare )due to inflammatory debris
.this pleural surface in aqueous humor ( , hyphema
)blood in anterior chamber(.
Muddy appearance of iris and
miosis
Multiple pyaemic
abscesses
encountered in a
10 day old foal
with septicemia

15. Septicemic form, edematous swelling
.of neck and throat

16. Caused by Corynebacterium ovis
Chronic form, Corded lymphatic Lesion affecting the
extensive vessels and lower hind limbs of
fibrosis and purulent discharge foal above the hock. It
distal edema of from ulcerated site is unusual to find
hind leg )arrow(. Chronic lesions above the hock
thickening and or on the front limbs
exudate over distal
parts of limb

17. Lesion restricted to saddle
contact area. Very painful
lesion with exudates
Lesion had been
present with little
change for several
years

18. Extensive hair
Extensive deep loss leaving
exudative hyperkeratotic
dermatitis with linear scabs and
cracking and skin denuded of
thickening of skin hair
on palmar pastern
of white foot
Loss of hair follows water run off pattern Extensive hair loss followed minor
remaining hair is matted with exudate, grooming effort, leaving denuded
some areas of hypopigmentation over skin with minimal scraping and no
gluteal region apparent exudates

19. Hair matted in a tesselated Pale glistening surface with
pattern purulent exudate found
under matted hair
Hair plucked from a case Paint brush effect with
showing paint brush effect denudation of hair. No
purulent exudate, skin
surface very dry

20. Chest abscesses )pigeon breast / Wyoming
strangles(Corynebacterium equi

21. Highly painful necrotic
changes in skin of coronet
.))arrow

22. Enlarged gland, mare lame,
obvious engorgement of
Gland was hot, painful, and
)transthoracic vein )arrow
had stringy milk without
clots. Edema above gland
Enlarged gland with
fibrous induration

24. Obvious heavy encrustation Raised hair patches of very
with minimal exudation early lesions )10 days post
)infection
Distribution of lesions
corresponding with girth
position. Several horses
sharing saddlery
developed an almost
identical syndrome over 2
weeks. Lesion
approximately 14 days
post infection

25. Microsporum gypseum transmitted Hair loss leaves silvery
by insect bite, note: location and grey glistening skin
pattern of lesions correspond with which heals within 4-5
biting site of insect, hair loss not days. Border of lesion
complete and scabs less easily poorly demarcated
removed

26. Multiple nodules and crusted plaques
over the shoulder

27. Lesion on third eye lid and/ or A mild, self limiting conjunctivitis with
at the lacrimal puncta often marked epiphora was present in this case
have an aggressive with the typically more severe lesions
neoplastic appearance characteristic of the disease on the eye lids
and within the naso lacrimal apparatus.
Marked tear dermatitis is often present
.down the sides of the face