Australian Veterinary Practitioner | Volume 50 (2) June 2020 - Flipbook - Page 67
Results: Overall, 538/1,015 (53.0%)
samples were seropositive for CRCoV, with
492/921 (53.4%) positive dogs in the North
Island and 46/94 (49%) in the South Island.
Age of dog, sampling month, region, and
presence of abnormal respiratory signs were
included in the initial logistic regression
model. Seroprevalence was higher in dogs
aged ≥3 compared with ≤2 years (p < 0.01).
The lowest seroprevalence was observed in
July (30/105; 28.5%) and August (32/100;
32%), and the highest in June (74/100;
74%). Seroprevalence in dogs from Auckland
was higher than in dogs from the Hawkes
Bay, Manawatu, Marlborough, and Waikato
regions (p < 0.05). Abnormal respiratory signs
(coughing, nasal discharge, or sneezing) were
reported for 28/1,015 (2.8%) dogs sampled.
Seroprevalence for CRCoV tended to be higher
among dogs with respiratory signs (67.9 (95%
CI = 47.6–83.4)%) than dogs with no reported
respiratory signs (52.6 (95% CI = 49.5–
Conclusions: Serological evidence of infection
with CRCoV was present in more than half of
the dogs tested from throughout New Zealand.
Differences in CRCoV seroprevalence between
regions and lack of seasonal pattern indicate
that factors other than external temperatures
may be important in the epidemiology of
CRCoV in New Zealand.
Clinical relevance: Our data suggest that
CRCoV should be included in investigations of
cases of infectious canine tracheobronchitis,
particularly if these occur among dogs
vaccinated with current vaccines, which do not
include CRCoV antigens.
Thoracic dog bite wounds in dogs: A
retrospective study of 123 cases (20032016)
Frykfors von Hekkel AK et al.
Vet Surg 49: 694-703, 2020; https://doi.
Objective: To report the clinical, radiographic,
and surgical findings and determine
prognostic factors for outcome in dogs with
thoracic dog bite wounds.
Study design: Retrospective study.
Animals: Client-owned dogs (n = 123).
Methods: Medical records of dogs with
thoracic dog bite wounds between October
2003 to July 2016 were reviewed for
presenting findings, management, and
outcomes. Standard wound management
included debridement and sterile probing,
extending the level of exploration to the depth
of the wound. Univariable and multivariable
binary logistic regression were used to assess
risk factors for exploratory thoracotomy, lung
lobectomy, and mortality.
Results: Twenty-five dogs underwent
exploratory thoracotomy, including lung
lobectomy in 12 of these dogs. Presence
of pneumothorax (odds ratio [OR] 25.4,
confidence interval (CI) 5.2-123.2, P < 0.001),
pseudo-flail chest (OR 15.8, CI 3.2-77.3, P =
0.001), or rib fracture (OR 11.2, CI 2.5-51.2,
P = 0.002) was associated with increased
odds of undergoing exploratory thoracotomy.
Presence of pleural effusion (OR 12.1, CI 1.2120.2, P = 0.033) and obtaining a positive
bacterial culture (OR 23.4, CI 1.6-337.9, P =
0.021) were associated with increased odds
of mortality. The level of wound management
correlated with the length of hospitalization
(Spearman rank order correlation = 0.52,
P < 0.001) but was not associated with
Conclusion: Dogs that sustained pseudoflail chest, rib fracture, or pneumothorax
were more likely to undergo exploratory
thoracotomy. Nonsurvival was more likely in
dogs with pleural effusion or positive bacterial