Pyometra in a female lion (Panthera leo): Report of case/piometra em uma leoa (Panthera leo): Relato de caso/piometra en una leona (Panthera leo): Reporte de caso.
Pyometra is a clinical disorder characterized by purulent material in the uterus. It is usually associated with cystic endometrial hyperplasia (1), a common lesion in the uterus that predisposes to bacterial infection (2). Occurs frequently in intact female bitches (3), and may cause severe systemic effects due to septicemia, leading to death if not treated. Pyometra can also occur in domestic and wild female cats, but it is less commonly seen (4). In these cases the clinical pattern of the disease is similar to those reported in domestic female dogs, although many aspects remain unclear.
Studies related to pyometra in wild cats are extremely scarce. In Brazil it is know that captive large felids, such as lions (Panthera leo), jaguars (Panthera onca) and tigers (Panthera tigris), may develop the disease (5, 6), but these cases are rarely reported. Thus, the aim of this report is to describe a case of pyometra in a captive female lion (Panthera leo).
REPORT OF CASE
An 11-year-old female captive lion was referred to the veterinary hospital for evaluation of a vulvar discharge. A despite this, the animals did not show any other clinical sign. Physical examination under dissociative anesthesia (ketamine 5mg/kg associated with xylazine 1mg/kg) revealed no other alterations. An abdominal ultrasonography was performed, and did not show abnormalities in the uterus, suggesting an open-cervix pyometra. Complete blood cells counts, biochemical profile, and urinalysis were normal. The animal was submitted to surgery, and an ovariohysterectomy was performed through a ventral midline incision using the same techniques described for domestic dogs and cats. Macroscopically, the uterus size was normal. The body of the uterus was incised using sterile materials, revealing a thick endometrium and purulent/sanguinolent fluid. It was not possible to perform a microscopic analysis of the uterus, but macroscopically it was compatible to a moderate endometrial cystic hyperplasia. A sterile swab was used to collect a sample for microbiological analysis. This was submitted to aerobic culture according to standard methods (7). The microbiological analysis resulted in Escherichia coli. The animal received antiinflammatories and antibiotics, and no vulvar discharge was seen postoperatively. However, an incisional hernia was observed 4 days after the surgery, and surgical correction was performed with strong non-absorbable sutures. The animal had an excellent recovery and it was reintroduced into the exhibition area of the zoo.
RESULTS AND DISCUSSION
The present case consisted of an open-cervix pyometra. As occurs in domestic female dogs and cats, it is common the absence of systemic abnormalities in cases of open-cervix pyometra (8), and that explain why the animal did not show other physical alterations, neither the complementary exams. The ultrasonography is one of the best diagnostic techniques to detect alterations in the uterus (9). In the present case the thickness of the uterus wall did not show significant alterations, making impossible to confirm the disease using this method. Several species of bacteria have already been isolated from the uterus of bitches with pyometra, such as Streptococcus canis, Pseudomonas spp. Klebsiella spp. and Proteus spp (9,1). However, Escherichia coli is the most common (10), and has already been reported in captive wild felids (11). The animal was 11-year old, and, as observed in the present case, old intact females are more susceptible to pyometra (12). The eventration occurred due to rupture of the suture, which is common in big animals. In addition, the difficulty of the postoperative management in wild animals is also an important factor to be considered. McCain et al. (11) also observed dehiscence of the suture in the linea alba in a female lion submitted to ovariohysterctomy.
The present case showed similarities with canine pyometra. The ovariohysterctomy is the recommended treatment for canine pyometra (3,1), and should also be considered in wild felids when the reproduction is not desirable.
Recebido em: 01/04/11
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Recebido em: 01/04/11 Aceito em: 12/05/11
Felipe Fornazari [1,2] *
Carlos Roberto Teixeira [2,3]
Sheila Canevese Rahal 
Patricia Yoshida Faccioli 
Patricia Helena Nogueira Almeida 
Helio Langoni 
 Departamento de Higiene Veterinaria e Saude Publica, Faculdade de Medicina Veterinaria e Zootecnia, Universidade Estadual Paulista (UNESP), Distrito de Rubiao Jr, S/N, Botucatu, SP 18618-970, Brasil. * Autor para correspondencia: email@example.com.
 Centro de Medicina e Pesquisa de Animais Silvestres (CEMPAS), Faculdade de Medicina Veterinaria e Zootecnia, Universidade Estadual Paulista (UNESP), Distrito de Rubiao Jr, S/N, Botucatu, SP 18618-970, Brasil.
 Departamento de Cirurgia e Anestesiologia Veterinaria, Faculdade de Medicina Veterinaria e Zootecnia, Universidade Estadual Paulista (UNESP), Distrito de Rubiao Jr, S/N, Botucatu, SP 18618-970, Brasil.
 Zoologico Municipal de Garca, rua Vital Soares S/N, Garca, SP 17400-000, Brasil.