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The aim of this study was to evaluate the prevalence of mastitis in female lactating dogs by interpreting the milk cytology in the diagnostic protocol. Milk samples were manually collected in sterile vials from 89 lactating bitches (i.e., 157 mammary glands) aged between 10 and 168 months. Milk smears were obtained by using the squash and May-Grünwald-Giemsa (MGG) techniques. Acute mastitis episodes were consistent with increased numbers of degenerated neutrophils, erythrocytes, and engulfed bacteria. Eosinophils were present in retention mastitis inflammations. Foamy cells were present in every type of inflammation. Subclinical cases of mastitis were characterized by a reduced number of neutrophils with engulfed bacteria. The period of lactation has a great influence on the type of mastitis encountered. Our results have showed that the lactation period has influence over different types of mammary gland inflammations. In most cases, galactostasis (65%) followed by subclinical mastitis (22%) and acute mastitis (13%) were encountered. Neutrophils and phagocytosis exhibited specificity for acute inflammations, whereas eosinophils and foamy cells were consistent with cases of retention mastitis. The presence of red blood cells in most cases was correlated with acute inflammations. It seems that cytological evaluation of milk could be quite helpful in diagnosing mammary gland inflammations.
Searching for new more accurate biomarkers in order to evaluate the health of bitches with reproductive disorders and disturbances has been a subject of inquiry for many researchers. Biomarkers are measurable indicators, the concentrations of which are dependent on the degree and type of stimulus. Serum C-reactive protein (CRP) has been proven to be a valuable biomarker for health status evaluation of bitches suffering from reproductive disorders, such as pyometra, as well as for treatment monitoring. However, no data are available related to the CRP profile in bitches with ovarian cysts for a better evaluation of their condition and prognosis. Thus, the aim of this study was to determine the possible usefulnessof CRP determination in the serum of bitches with ovarian cysts. Our results suggest that CRP concentrations could be useful indicators of the presence of ovarian cysts, although studies with more animals are needed.
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