Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
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The goat cheeses produced in our country come mainly from artisan cheese technology. The production of goat cheese for self-consumption or to market in tourist centers is a traditional activity of family farmers in the Northwest of Córdoba. Production and processing practices are used that give them particular flavors. These practices linked to the traditions of the producers, do not fully conform to the requirements of the regulations. For this reason, it was decided to carry out an exploratory investigation of the quality of goat cheeses, with the purpose of knowing their sanitary hygiene quality, for which safety indicator parameters were measured. Total and Fecal Coliform count, E. coli isolation, Coagulase positive staphylococcus count, determination of the presence of Salmonella spp and Yeast and Fungal counts were carried out. A total of 14 cheese samples were analyzed, from the Department of Pocho, (Northwest of Córdoba). As a result of the microbiological evaluation, it was concluded that these cheeses do not meet the requirements established in the Argentine Food Code. Situation that raises the need to make improvements adapted to real production practices. It is necessary to ensure safety by preserving artisanal practices, which guarantees the conservation of the characteristics of the cheeses for which they are recognized and consumed.

In tuberculosis, the knowledge of the different types of lesions allows to understand the pathology and transmission of the disease. Goats play an important role in transmitting this condition to cattle and humans. The objective of the present work is to describe the macroscopic and microscopic lesions observed in natural infected goats with Mycobacterium bovis (M. bovis).Fifty-five tuberculin test positive goats were analyzed, detailing the macroscopic and microscopic pathological presentations. Among them, 5 animals with lung cavity lesions were found. It is concluded that in natural infected goats, a widevariety of lesions is observed, mainly affecting the respiratory system; some of them very directly involved with the transmission of the disease within the herds.

This study aimed to evaluate the impact of Pichia kudriavzevii on immuneorgans and small intestine histopathological changes of broiler chickensfeed with monensin (MON). Birds (3 replicates/4 treatments, 5 broilers chickens/replicate, total: 60) were housed in metallic cages and experimental diets were:treatment (T) T1: basal diet (B); T2: B + MON (50 mg/kg); T3: B + P. kudriavzevii (1g yeast/kg feed); T4: B + MON + P. kudriavzevii. The experimental period was 28days. At the end of the feeding trial, small intestine, spleen, thymus and bursa ofFabricius (BF) were removed to evaluate histopathological changes; relative andabsolute weighs were determined. Spleen weights did not show significant differences(p <0.05) while these values showed a negative trend when MON wasadded. Thymus weights showed a significant decrease (p <0.05) in T2. Spleen,thymus, BF and spleen/BF radius values showed a positive trend with the additionof yeast. The histopathology of the thymus in T2 showed an alteration inthe cortex-medullary relationship, T4 showed less evident cortex development.Spleen samples from T2 showed splenic congestion and cells with cariorrexisnuclei, T4 showed less congestion. A decrease in villus height and less gobletcells, with normal numbers of intraepithelial lymphocytes were observed in T2.The addition of 50 mg / kg MON negatively affected the immune organs and thesmall intestine. These changes were attenuated with the addition of yeast. Infuture studies, these negative effects of coccidiostat could be fully counteractedwith a higher yeast concentration.

Prostaglandins (PGE2 and PGF2α) play an essential role in the ovulation process in mammals. The objective of this experiment was to determine whether intrafolicular injection with prostaglandin F2 alpha (PGF2α) administered in the pre-ovulation period induced normal ovulation and corpus luteum formation, it was later confirmed with the presence of an embryonic vesicle. Six mixedbreed mares were used in two estrous cycles each, with a crossover design. The ultrasonographic examination of the reproductive tract was performed every 24 hours from day 15 of the cycle (Day 0 = day of ovulation) until the time of follicular puncture (Hour 0). The ultrasound guided puncture of the preovulatory follicle (diameter ≥ 35 mm and presence of moderate uterine edema) was performed through the flank, injecting 750 μg of PGF2α diluted in 0.5 ml of sterile water (treated group n = 6) or placebo (0.5 ml of injection water) (control group n = 6). Prior to puncture, the mares were inseminated with fresh semen.Ultrasound images were obtained every 12 h of the punctured follicle and blood samples were taken every 48 h from the jugular vein to determine plasma progesterone levels. Five of the six mares (83%) of the treated group had ovulation failures and only one of the mares ovulated but no pregnancy was obtained. According to these results, intrafolicular injection with PGF2α at the concentration used would not allow normal ovulation and contrary to expectations would induce the formation of anovulatory hemorrhagic follicles. In addition, a delay in progesterone rise was observed in the only mare that ovulated.

In the central arid-semi-arid region of Argentina, forage production is mainly based on natural grasslands. The incorporation of native forage legumes in these environments is a favorable strategy, due to their ability to fix atmospheric nitrogen. Adesmia bicolor has been evaluated for this purpose and, although progress has been made in the knowledge of some agronomic characteristics, there are still no studies on the effect of phosphate fertilizers on its growth and development. The soil analysis prior to the experience detected a low level of P, equivalent to 8 ppm, so the objective of this work was to determine the effect of a phosphate fertilizer on the vegetative and reproductive traits of A. bicolor in culture. Two treatments were applied with the following doses of fertilizer: treatment I (50 kg ha-1 P), treatment II (100 kg ha-1 P), and control (0 kg ha-1 P). During the vegetative stage of the crop the following characteristics were analyzed: number of leaves, stolons, and buds m-2, length and width of 50 leaflets. In the reproductive stage, number of flowers and fruits m-2 and per raceme was determined. The results show that the treatment with application of 50 kg ha-1 P produced the highest number of vegetative and reproductivestructures, so this dose would be the most suitable for fertilization of A. bicolor crop in soils with low P concentrations.

Canine mammary neoplasm is a very frequent reason for clinical consultation  and its treatment of choice is mastectomy. In medical practice, one of the fundamental aspects is determine the prognostic of this pathology and this is an issue of interest to the owners. The aim of this work was to determine the disease free survival (DFS) and the overall survival (OS) of the bitches subjected to mastectomy as the only treatment of this neoplasm and its relationship, with histolopathological characteristics. Twenty-two bitches that presented masses compatible with mammary neoplasms subjected to mastectomy were includedin this research. Then, the histopathological diagnosed of the lesions and the clinical follow-up during 24 months was carried out. The bitches were controlled quarterly after surgery in search of local recurrence or distant metastases. The results were analyzed and it was determined that 50% were benign tumors and 50% were malignant tumors. The average DFS period was 318 days and the mean OS was 436 days. An association between the histological type and the prognosis of the disease was found: simple and mixed carcinomas had a less aggressive behavior than other carcinomas. Furthermore, there was a relationship between DFS and OS with the tumor malignancy grade, at a lower grade, greater OS; in this last case it was significantly statistically.

Arhopalus rusticus and Arhopalus syriacus are exotic species of Cerambycidae, which were first recorded in Córdoba in 2006. Their larvae sweep the phloem of pines. The objective of this investigation was to study the abundance and distribution of these species in the pine forests of the province from 2009 to 2016 with the purpose of contributing to the integrated management of these species. For this, 40 parcels of five Pinus elliottii trees were installed from 2008 to 2015. The next year, two 1m long logs were extracted per parcel. The abundance was quantified from October to April by examining the logs twicea week. Distribution maps per species and year were made. The data were analyzed through generalized linear mixed models. In the time of this study, both species were recorded in all of the evaluated locations. The best model indicates that the variation in abundance responds to the species, the different locations and diameters of the pines and the time. Although in different locations, both species presented a peak in abundance in 2009. In the subsequent years, they reduced and maintained their abundance at low levels. From these results, it was hypothesized that A. syriacus and A. rusticus are irruptive species.

Canine hepatozoonosis is a parasitic disease acquired by ingestion of ticks infected with protozoa of the genus Hepatozoon (H). Hepatozoon canis is the only species found so far in Argentina, and it is a parasite of frequent presentation in the dogs of our environment. In this work, through a retrospective study, the most common clinical characteristics and hematological aspectsfound in dogs with this parasitosis were surveyed. For this, the medical records of the FAV School Hospital were analyzed, from 2002 to 2014. The most common findings were fiber, pale mucous membranes, adenomegaly and ocular secretion, normochromic macrocytic anemia and leukocytes within the reference values.

Culturally, nutrition in breeding cows is not usually an aspect to consider for livestock raising and there is little knowledge that systems have about the impact that it has on the performance of future calves. Fetal programming produces direct effects on the fetal development of the calf within the maternal womb, persistently altering its life. It has been proven that poor nutrition, especially protein, during the last third of pregnancy impacts on the total number of muscle fibers in the progeny, birth weight and final weight, affecting not only muscle growth and performance of the casing of calves destined for meat, but also the reproductive performance of heifers for replacement. In turn, the excess of protein during this stage of gestation has not caused negative or positive changes in the growth and development of calves born to mothers fed under this condition. It has been shown through different research that animal nutrition begins during pregnancy with a direct impact on the future productive and reproductive performance of cattle, knowing this and through new studies and future experiences can design precise management practices on nutrition of pregnant women to promote greater productive efficiency of beef cattle.

The advance of cities increases impermeable surfaces and generatesnegative impacts. Green roofs are an alternative way of dealing with thissituation. Plants growing upon roofs are subject to extreme environmental conditions,in Rio Cuarto these conditions are amplified because it´s a sub-humidregion. In order to be durable, the combination of species that tolerates thebioclimatic factors of the place must be found. Plant life forms represent differentpatterns of resource use and adaptations to the environment, making theyield and suitability of plants in communities superior to those in isolation. Inour area studies are needed to determine performance in microcosms with differentcombinations of grass species, both native and exotic and creeping herbaceous.This is necessary since there is no history of the subject at the locallevel. Added to the advances in legislation, programs and technologies referredto green roofs in the provincial, national and international context.