Canine
Infectious
Infertility
p 225-240
Vaginitis
- Clinical signs of vaginitis include vulvar
discharge, scooting, licking, and frequent urination.
- The cause may be bacterial, but care must be taken
when trying to interpret vaginal cultures.
-
Vaginal cultures can be taken from the bitch for
various reasons including pre-pubertal or post-pubertal vaginitis,
post-parturient discharge, discharges during pregnancy,
post-abortion discharge, and pre-breeding in normal or infertile
bitches.
-
If a vaginal culture is performed because the client
has noticed a 'vaginal' discharge, the potential causes and sources
of the discharge should be realized.
-
The sources of 'vaginal
discharge' include anomalies of the reproductive tract, the
vestibule, the clitoris, the vagina, the uterus and the perivulvar
skin.
-
Potential causes of vaginal discharge include pyometra, post-partum
lochia, normal estrual discharges, vaginitis, clitoral hypertrophy,
and skin fold pyoderma.
-
A good history and vaginal examination will
help rule out the potential sources of the vaginal discharge.
-
If a
culture is to be performed as part of a pre-breeding examination,
then the performance and interpretation of the culture become
critical.
-
Vaginal cultures are best performed with a guarded swab to
avoid contamination as the culturette is passed through the
vestibule.
-
Estrus, diestrus and anestrus cultures have yielded
different results in some studies that need further interpretation.
-
Assuming the culture was taken as part of
pre-breeding examination and the client needs a 'negative' culture
before breeding, what kind of results can we expect on the culture?
-
About 60% of normal bitches yielded growth from a single deep
vaginal culture and 90% from a single caudal vaginal culture in one
study.
-
Another study found only 5% of bitches had no growth from
vaginal cultures taken repeatedly over an 18 month period.
-
In
several studies the most commonly isolated bacteria from normal dogs
were Pasteurella and Streptococci, with E. coli and Staphlocc. also
being isolated, less often.
-
Pure, single cultures of Pasteurella
were most common while mixed cultures were usually Pasteurella and
Streptococci or E. coli. In infertile dogs, the same basic isolates
have been identified.
Vaginal Flora from Bitches
Fertile/Infertile
Organism
|
Allen
|
Baba
|
Doig
|
Hirsh
|
Myers
|
Olson
|
Osbaldson
|
Strep.
|
85/37
|
52
|
-
|
81
|
47/51
|
28
|
6/23
|
Staph.
|
20/19
|
40
|
-
|
27
|
10/12
|
12
|
28/13
|
Past.
|
26/9
|
34
|
-
|
5
|
70/49
|
10
|
-/15
|
E. coli
|
47/23
|
23
|
-
|
45
|
27/25
|
19
|
78/18
|
Bacteroides
|
-
|
55
|
-
|
-
|
-
|
-
|
4
|
Mycoplasma
|
-
|
43
|
68/95
|
-
|
-
|
-
|
-
|
No Growth
|
14/45
|
4
|
-
|
3
|
-/5
|
37
|
2/-
|
N
|
74/22
|
78
|
16/19
|
82
|
30/170
|
81
|
50/297
|
|
Fertile/Infertile (%)
|
|