Swine erysipelas, clinical diagnosis and medical management: cases in farm near the city of Lubumbashi

The general objective of our work was to diagnose swine erysipelas, treat infected pigs and determine the prevalence of this pathology on the farm near the city of Lubumbashi. It is located 30 km from the city of Lubumbashi, on the axis of the Kasenga road, to the east of the Haut-Katanga Province. This disease plays a key role in perpetuating the downfall of pig farms. That’s why we asked ourselves the following questions: · What would be the categories of pigs most affected by this disease? · What would be the level of information for breeders and the risk of infection? · At what rate would the losses be assessed on the farms examined? This work concerns a farm that experienced swine fever a year earlier and whose pigs were not vaccinated against erysipelas. This disease is a major cause of death in pigs. The prospective method in clinical diagnosis and care was applied to 98 pigs from 4 zootechnical categories, namely piglets, sows, castrated males and boars. The data collected in this study revealed a prevalence of 81.6% with a mortality rate of 61.2% and a cure rate of 20.4%. Only 18.4% of pigs were not affected by the disease. The study carried out, involved 98 pigs of different categories including 37 piglets, 35 sows, 6 boars and 20 castrated. These pigs were of exotic Land race, large white, Piétrain and Duroc. There are also hybrid pigs. We concluded that the results obtained in our research on swine erysipelas concern 98 study animals divided into 4 zootechnical categories. It appeared 80 pigs or 81.6% were struck by erysipelas and only 18 or 18.4% had remained healthy. The infection rate was thus 81.6%.

Characterization of Erysipelothrix rhusiopathiae Isolates from Diseased Pigs in 15 Chinese Provinces from 2012 to 2018

Erysipelothrix rhusiopathiae can cause erysipelas in animals and erysipeloid in humans. Since its recurrence in 2012, swine erysipelas has caused serious losses within the pig industry in China. The aim of this study was to perform multilocus sequence typing and understand the virulence and antimicrobial susceptibility of E. rhusiopathiae isolates in China. Multilocus sequence typing (MLST) of a total of 120 strains was performed, and as a result, three different sequence types were identified, of which ST48 was the main one. Five isolates of each MLST type were randomly selected to be used to challenge mice. ST48 was associated with a higher virulence. Antimicrobial susceptibility was tested using a microdilution technique and, to analyze the resistance mechanism, six strains were selected for genome sequencing. A comparison of the six genomes indicated the presence of a suspected macrolide resistance gene, namely, Erm(A)-like, in erythromycin-resistant strains, which increased the minimum inhibitory concentration (MIC) of erythromycin against E. coli C600 at least four-fold. In addition, three mutations (gyrA86T-I, gyrA90D-N, and parC81S-I) were observed in the quinolone resistance-determining regions (QRDRs) of gyrA and parC in quinolone-resistant strains. After the gyrA gene with the 86T-I mutation or the parC gene with the 81S-I mutation was transfected into E. coli C600, the MIC of enrofloxacin against this strain increased at least two-fold. Our findings provide a theoretical basis for developing antibacterial drugs and may contribute to the clinical prevention and control of E. rhusiopathiae.

Swine Erysipelas; It’s Epidemiology, Diagnosis, Treatment and Control and Preventive Measures, Comprehensive Review

Erysipelas is an infectious disease seen mainly in growing pigs and characterized clinically by fever, arthritis, skin lesions and sudden death. The disease may be acute, subacute, or chronic. Swine erysipelas is a disease caused by a specific micro organ Erysipelothrix rhusiopathiae whic h is a zoonotic ubiquitous gram-positive bacterium that causes erysipelas in swine, mammals, birds and erysipeloid in humans. People in contact with animals, animal products or animal wastes are at greatest risk. The acute form of swine erysipelas may have been confused for other diseases in pigs which are characterized by acute symptoms such as sudden death (for example, African swine fever). It can be diagnosed by its clinical signs, necropsy findings, bacteriology, antimicrobial response, molecular and serological examinations. It is recommended to increase awareness of the disease among animal and human practitioners as treatment is easy and available and vaccination is possible. However, the disease is still unknown to local veterinarians, clinical doctors, meat inspectors, butchers and laboratory personnel. Proper hygiene, regular pork inspection, use of protective wear among people working/ in contact with animals should be promoted. The disease causes high economic loss in pig rearing areas and influences the public health being a severe zoonotic disease. So the objective of this review is to create a better understanding of the disease for proper control and prevention of the disease

Swine Erysipelas; It’s Epidemiology, Diagnosis, Treatment and Control and Preventive Measures, Comprehensive Review

Erysipelas is an infectious disease seen mainly in growing pigs and characterized clinically by fever, arthritis, skin lesions and sudden death. The disease may be acute, subacute, or chronic. Swine erysipelas is a disease caused by a specific micro organ Erysipelothrix rhusiopathiae whic h is a zoonotic ubiquitous gram-positive bacterium that causes erysipelas in swine, mammals, birds and erysipeloid in humans. People in contact with animals, animal products or animal wastes are at greatest risk. The acute form of swine erysipelas may have been confused for other diseases in pigs which are characterized by acute symptoms such as sudden death (for example, African swine fever). It can be diagnosed by its clinical signs, necropsy findings, bacteriology, antimicrobial response, molecular and serological examinations. It is recommended to increase awareness of the disease among animal and human practitioners as treatment is easy and available and vaccination is possible. However, the disease is still unknown to local veterinarians, clinical doctors, meat inspectors, butchers and laboratory personnel. Proper hygiene, regular pork inspection, use of protective wear among people working/ in contact with animals should be promoted. The disease causes high economic loss in pig rearing areas and influences the public health being a severe zoonotic disease. So the objective of this review is to create a better understanding of the disease for proper control and prevention of the disease.

Meteorological Factors and Swine Erysipelas Transmission in Southern China

Swine erysipelas (SE) is one of the best-known and most serious diseases that affect domestic pigs, which is caused by Erysipelothrix rhusiopathiae. It is endemic in Nanning and has been circulating for decades, causing considerable economic losses. The aim of this study was to investigate the effect of meteorological-related variations on the epidemiology of swine erysipelas in Nanning City, a subtropical city of China. Data on monthly counts of reported swine erysipelas and climate data in Nanning are provided by the authorities over the period from 2006 to 2015. Cross-correlation analysis was applied to identify the lag effects of meteorological variables. A zero-inflated negative binomial (ZINB) regression model was used to evaluate the independent contribution of meteorological factors to SE transmission. After controlling seasonality, autocorrelation and lag effects, the results of the model indicated that Southern Oscillation Index (SOI) has a positive effect on SE transmission. Moreover, there is a positive correlation between monthly mean maximum temperature and relative humidity at 0-1 month lag and the number of cases. Furthermore, there is a positive association between the number of SE incidences and precipitation, with a lagged effect of 2 months. In contrast, monthly mean wind velocity negatively correlated with SE of the current month. These findings indicate that meteorological variables may play a significant role in SE transmission in southern China. Finally, more public health actions should be taken to prevent and control the increase of SE disease with consideration of local weather variations.

Antimicrobial activity of enrofloxacin in vitro

Continuouse use of enrofloxacin contributes to emergence of enrofloxacin-resistant mi-crobial resistance, isolated and reported late-ly. In this study we deal with the spread of resistance of enrofloxacin among pathogenic organisms, infecting animals. The suscepti-bility to enrofloxacin was studied in standard disc diffusion assay. We studied 437 bacteri-al isolates in total. Salmonella dublin and Sal-monella typhimurium showed the highest suscepti-bility to enrofloxacin (100%); Salmonella enter-itidis and Salmonella choleraesuis proved a bit less susceptibility (95% and 94,7%). 5% of S. enter-itidis isolates and 5.3% of S. choleraesuis isolates had intermediate susceptibility. We did not register any resistance of isolates of Salmonella, Pasteurella and Morganella (Pasteurella multocida, Morganel-la morganii). 83.9% of Escherichiacoli strains proved susceptibility to enrofloxacin, the zone of retardation in 6.4% of the isolates was in corre-spondence with intermediate susceptibility, 9.7% of the isolates proved to be resistant. 90,9% of Pseudomonas aeruginosa isolates in our study was susceptible to enrofloxacin, 9.1% of them had intermediate susceptibility. The isolates of Strepto-coccus spp. and Staphylococcus pseudintermedius re-vealed high susceptibility to enrofloxacin, also as Listeria monocytogenes (causative agent of listeriosis)and Erysipe-lothrix rhusiopathiae (causative agent of swine erysipelas). 87.5% of the coagulase negative staphylococci proved susceptible to enrofloxacin; 6.25% of the isolates were resistant or had intermediate susceptibility. The shares of susceptible isolates of Staphylococcus hyicus, Staphylococ-cus aureus and Streptococcus uberis were respec-tively 65.1%, 75%, 75%. The shares of isolates with intermediate susceptibility of the same spp. were respectively 9.3%, 15%, 25%. The shares of resistant isolates of Staphylococci were respective-ly 25.6% and 10%. We found no strains of Str. uberis with resistance to enrofloxacin. As for Enterococci, 52.4% of the isolates were enrofloxacin-susceptible, 11,9% and 37,7% of them were re-spectively enrofloxacin-resistant or had intermedi-ate susceptibility. Presently most Gram-negative pathogenic bacteria have no resistance to enroflox-acin. Notwithstanding that enrofloxacin is signifi-cantly less effective against such pathogenic organ-isms as Staphylococci and Streptococci.