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Special Topics On Swine Disease-Toxoplasmosis Overview: The causative agent of toxoplasmosis is Toxoplasma gondii, a protozoan parasite belonging to the genus Toxoplasma, commonly referred to as Toxoplasma. This parasite is a type of coccidian and is named fo...

Special Topics On Swine Disease– Sarcoptic Mange Overview:Swine sarcoptic mange is a chronic parasitic skin disease caused by Sarcoptes scabiei var. suis, a mite from the Sarcoptidae family, which parasitizes the skin of pigs. It poses a significant thr...

Overview:

Porcine Endemic Pneumonia is a chronic respiratory infectious disease in pigs. The causative agent is Mycoplasma hyopneumonia (also known as M. hyorhinis), and the primary clinical symptoms include coughing and dyspnea. The characteristic lesion is fusiform bronchopneumonia, with some lung lobules showing "meaty" consolidation. The infection mechanism involves Mycoplasma infecting the bronchial cilia, damaging them and causing a loss of the tracheal function to block pathogens. Secondary infections by other pathogens in the environment (e.g., Pasteurella, Actinobacillus pleuropneumonia, Salmonella, and viruses) lead to multi-factorial respiratory diseases. In acute cases, pulmonary edema and emphysema predominate; in subacute and chronic cases, "shrimp meat"-like consolidation of the lungs is observed. The disease has a high infection rate but low mortality, though it can cause growth retardation and reduce feed efficiency. In other words, it prolongs the time to market for pigs.

Special topics on swine diseases：Red Dysentery

Pathogen

The causative agent is Clostridium perfringens type C, also known as Clostridium welchii type C. This is a Gram-positive, encapsulated, non-motile anaerobic bacillus with oval spores located centrally in the bacterial body. This bacterium can produce lethal toxins, mainly α and β toxins, which can cause enterotoxemia and necrotizing enteritis in piglets. After spore formation, the bacteria are highly resistant to external conditions.

Pathogen: PRRS is an RNA virus with two major strains: the American type and the European type. Susceptible Animals: Pigs are the only susceptible species. All breeds and ages of pigs can be infected, but pregnant sows and piglets under one month of age a...

Pathogen:Porcine circovirus (PCV) is the smallest known animal virus, classified into two serotypes: PCV1 and PCV2. PCV1 is non-pathogenic, while PCV2 is pathogenic and the primary causative agent of Post-weaning Multisystemic Wasting Syndrome (PMWS). Howeve...

OverviewSwine streptococcosis is a zoonotic disease caused by various pathogenic Streptococcus species in pigs. It leads to conditions such as meningitis, septicemia, endocarditis, arthritis, and pneumonia, primarily manifesting as fever and severe toxemia. ...