Passive natural immunity transfer in pigs from two different commercial breeding farms was determined. For this purpose, blood from 221 pigs, 24 hours after being born and 21 mothers pigs, were taken. The pigs from each farm were separated into two groups consisting of approximately 50 individuals each. The first group was treated as usually done by the farm owners, and to the second, an immunomodulator product (produced with LPS), was to the mothers given. Obtained serums were by means of cellulose acetate electrophoresis, immunoelectrophoresis, quantitative radial immunodiffusion and zinc sulfate turbidity tests analyzed. Total protein concentration was determined using a Golberg refractometer. Obtained results were analyzed and the importance of an adequate natural passive immunity transfer is discussed. Also discussed is the possible use of the immunodulator in commercial pig breeding farms that present high rates of neonatal morbimortality.

In spite of the recognized rusticity of the cachama, the increasing tendency towards the intensification of the production systems of the species, begins to favor the increase of sanitary problems, which will have to be characterized in order to be able to establish methods of diagnosis and rational plans of prevention. Since the knowledge of ictiopathology of native species is incipient, among other things because of the little availability of information on basic aspects of histology, embryology, physiology, anatomopathology, immunology and epidemiology,  the establishment of investigation projects that allow to know such aspects in order to support the production of these species technically becomes necessary. With this work begins the acquisition of knowledge about the basic immunologic aspects of the White Cachama (Piaractus brachypomus).For this end, gamma-globulins were purified by means of the elution starting from agarosa gels. The presence of two possible attachés of IgM was confirmed. One of them seems to correspond to form monomerics and the dependability of this purification method allows us to obtain small quantities of protein without the presence of pollutants. The reactivity of the obtained antiserum only reacted against the fraction of the gamma-globulins, what was proven by means of the inmunoelectroforesis technique with the serums of White Cachama. Also, they obtained two bands with SDS - PAGE under conditions without reduction; the first one with an approximate weight of 80 kDa and the second one about 70 kDa. Under reduced conditions, two bands were obtained, the first one with an approximate weight of 90 kDa and the second of 70 kDa.

An analysis of the data base of medical histories of a located veterinary clinic in Bogota, Colombia is presented to establish the order of importance of the different diagnosed pathologies in the dogs taking into account their frequency, age of presentation, breeds affected and gender. The study includes 72,248 registries. It was carried out between 1994 and 2004. The processes that affect skin and tegumentos represented 24.5% of the studied cases, gastroentéricas pathologies 13,2%, odontológicos infestations by different types from parasites 7.9% and diagnoses 7,1%. The two more prevalent breeds are the Labrador retriever with 23,2% and the French poodle with 18%, which means that among them it makes up for 41.2% of the races taken care of in consultation. Even though the present work, given the characteristics of the used methodology and mainly of the type of sample, does not constitute an exact reflection necessarily of what occurs in the city in terms of pathologies that affect the dogs, it is a first reference and the studied sample is ample in number of cases and time of observation.