Survey of Porcine Proliferative Enteritis in the Tohoku District of Japan

Abstract

ABSTRACT. A survey of proliferative enteritis (PE) in pigs at a meat processing plant was conducted using polymerase chain reaction (PCR) testing methods. During the investigation period, 227 of 83,717 pigs brought to the meat processing plant from Iwate, Fukushima , Miyagi, Niigata, and Yamagata Prefectures displayed characteristic general pathological features in terminal ileum, including mucosal hypertrophy and reticulation of serosal surface. Of these, 179 cases were further examined in the laboratory. All cases displayed characteristic histopathological features, and the specific band of the Lawsonia intracellularis (Li) causative agent of PE in pigs was detected in 155 cases by PCR testing methods. These results suggested a general infiltration of Li in the Tohoku district. KEY WORDS: Lawsonia intracellularis, PCR, porcin proliferative enteritis.

An Atypical Porcine Proliferative Enteropathy of Malgrowth Piglets

“…On the other hand, chronic PPE hardly identified in a farm, due to its inarticulate clinical symptoms [4,5]. Chronic PPE is usually detected by the anatomical examinations of the intestine at the meat inspection center [4][5][6]9]. Although the macroscopic findings are extremely important for the diagnosis of PPE [5], some of the atypical PPE as shown in the present report may be failed to be identified at the meat inspection.…”

“…Porcine proliferative enteropathy (PPE) is a major enteric disease of the growing/finishing pigs, with a worldwide distribution [4,5,9]. The infection is usually subclinical, but pigs aged 6-20 weeks may, when subjected to stress, develop subacute or chronic symptoms including low weight gain, yellowish pasty feces, and irregular diarrhea [4,5].…”

Probiotic supplementation improves reproductive performance of unvaccinated farmed sows infected with porcine epidemic diarrhea virus

“…Apart from porcine reproductive and respiratory virus (PRRSV) and porcine circovirus type2 (PCV2) (which were positive but not active), a preliminary survey of the farm was negative for the following pathogens in sows and suckling piglets: rotavirus, transmissible gastroenteritis virus (TGEV), Clostridium perfringens , enterotoxigenic Escherichia coli (ETEC), Salmonella sp., Brachyspira hyodysenteriae , Lawsonia intracellularis and classical swine fever virus (CSF). All pathogens except for the CSF virus were tested for by PCR methods as described elsewhere (PRRSV, Inoue, Tsukahara, Sunaba, Itoh, & Ushida, ; PCV2, Sasaki et al., ; rotavirus, Ushida et al., ; TGEV, Kim, Song, & Park, ; C. perfringens , Takahashi, Yoshida, Nakanishi, Tsukahara, & Ushida, ; ETEC and Salmonella spp., Fukushima, Tsunomori, & Seki, ; B. hyodysenteriae , Piao et al., ; L. intracellularis , Suto et al., ). CSF virus has been already eradicated in Japan.…”

An epidemiological survey on pigs showing symptoms of infectious enteric diseases and dyspepsia in Japan

“…Other bacterial pathogens, i.e. Lawsonia intracellularis (Li), Brachyspira hyodysentariae (Bhyo), and B. pilosicoli (Bpilo), were examined by polymerase chain reaction (PCR) according to Suto et al. (2004) or Piao et al.…”

“…Other bacterial pathogens, i.e. Lawsonia intracellularis (Li), Brachyspira hyodysentariae (Bhyo), and B. pilosicoli (Bpilo), were examined by polymerase chain reaction (PCR) according to Suto et al (2004) or Piao et al (2007). For these PCR detections, bacterial DNA was extracted from fecal samples as described by Godon et al (1997).…”