The prevalence of <i>Taenia solium</i> metacestodes in pigs in northern Tanzania

Boa, M.E.; Bøgh, Henrik O.; Kassuku, A.A.; Nansen, P.

doi:10.1017/s0022149x00013997

Cited by 38 publications

(14 citation statements)

References 7 publications

(8 reference statements)

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“…A retrospective study of slaughter slab records from Mbulu district in Tanzania from 1985 to 1989 indicates a prevalence increasing from 0.41 to 4.88% during that time (Nsengwa, 1995). This was further substantiated in 1993 by a postmortem survey of pigs slaughtered at different slaughter slabs in the northern highlands (Arusha, Moshi, Mbulu), which indicated that 4.5 Á/37.7% were infected, with the vast majority of these pigs originating from Mbulu (Boa et al, 1995). A recent ante-mortem survey involving lingual examination of pigs in villages of Mbulu District revealed an overall district prevalence of 17.4% (n 0/770), with a prevalence of the individual villages (n0/21) ranging from 3.2 to 46.7% (Ngowi, 1999).…”

Section: Tanzaniamentioning

confidence: 90%

The emergence of Taenia solium cysticercosis in Eastern and Southern Africa as a serious agricultural problem and public health risk

et al. 2003

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Pig production has increased significantly in the Eastern and Southern Africa (ESA) region during the past decade, especially in rural, resource-poor, smallholder communities. Concurrent with the increase in smallholder pig keeping and pork consumption, there have been increasing reports of porcine cysticercosis in the ESA region. This article reviews the findings concerning the presence and impact of porcine cysticercosis in seven of the ESA countries. Most of the reported findings are based on surveys utilising lingual palpation and post-mortem examination, however, some also used serological assays. In Tanzania, community-based studies on porcine cysticercosis indicate a prevalence of 17.4% in the northern highlands district of Mbulu and a prevalence range of 5.1 Á/16.9% in the southern highlands. In Kenya recent surveys in the southwestern part of the country where smallholder pig keeping is popular indicate that 10 Á/14% of pigs are positive for cysticercosis by lingual examination. Uganda has the most pigs in Eastern Africa, most of which are kept under smallholder conditions. Preliminary surveys in 1998 and 1999 at slaughterhouses in Kampala indicated a prevalence of porcine cysticercosis between 0.12 and 1.2%, however, a rural survey in northern Uganda in 1999 indicated 34 Á/45% of pigs slaughtered in selected villages were infected. Additionally, a new survey of 297 pigs slaughtered in Kampala in 2002 indicated that pigs from the central region of the country were negative for cysticercosis while 33.7% of the pigs coming from the rural Lira district in the north were positive. Interestingly, 8 piglet foetuses removed from an infected slaughtered sow coming from Lira district were all found to harbour cysts of T. solium providing evidence of congenital transmission of porcine cysticercosis. In Mozambique, abattoir records indicate that porcine cysticercosis is present in all provinces of the country. A serological survey on pigs in rural Tete Province found 15% of pigs positive. In Zimbabwe, a retrospective study in official abattoirs around the country from 1994 to 2001 reported a mean prevalence of 0.34% which is in contrast to a post-mortem survey in 1999, which showed that the prevalence of porcine cysticercosis in rural west Zimbabwe where smallholder pig keeping is popular was 28.6%. In Zambia, abattoir records reported porcine cysticercosis in six of the nine provinces. Routine meat inspection of 1316 pigs at a slaughter slab in Lusaka showed that 20.6% of the pigs had cysticercosis whereas serological testing of 874 pigs at the same abattoir indicated that 56.6% were found to have circulating antigens of Taenia solium . Field surveys based on lingual palpation in Southern and Eastern Provinces of Zambia revealed prevalences of 8.2 Á/28.4 and 5.2%, respectively. South Africa has the largest number of pigs in Southern Africa and cysticercosis has been recognised as a problem in the country for many decades. There is strong evidence supporting the high prevalence of neurocysticercosis infect...

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Section: Tanzaniamentioning

confidence: 90%

The emergence of Taenia solium cysticercosis in Eastern and Southern Africa as a serious agricultural problem and public health risk

et al. 2003

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“…In East and Southern Africa, the prevalence is reported to be as high as 20-40% (Phiri et al 2003). In Tanzania, prevalence of porcine cysticercosis in slaughter pigs ranges from 0.3 to 17.4% (Boa et al 1995(Boa et al , 2006.…”

Section: Introductionmentioning

confidence: 98%

Prevalence of extra-intestinal porcine helminth infections and assessment of sanitary conditions of pig slaughter slabs in Dar es Salaam city, Tanzania

Mkupasi

Ngowi

Nonga

2010

Trop Anim Health Prod

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A study was carried out to establish the prevalence of extra-intestinal porcine helminth infections and to assess the pig slaughter slab sanitary conditions in Dar es Salaam city, Tanzania. A total of 24 privately owned pig slaughter slabs were assessed. All slaughter slabs were sub-standard; wrongly located, poorly designed and constructed and lacked most basic requirements for a slaughter house. Because of inadequate slaughtering, disposal and cleaning facilities, the slaughter slabs were under unhygienic condition with questionable safety, soundness and wholesomeness of the pork produced. Routine meat inspection procedures were used to detect extra-intestinal porcine helminth infections. Of the 731 examined pigs; 8.1%, 5.9% and 0.4% were infected with ascariosis, porcine cysticercosis and hydatidosis, respectively. It was noted that almost all slaughter pigs in Dar es Salaam originated from different regions. Based on the region of origin, the status of porcine cysticercosis was 8.2% for Dodoma (n = 98), 8.2% for Manyara (n = 260) and 6.9% for Mbeya (n = 116). This study disclosed the unhygienic sanitary condition prevailing in Dar es Salaam pig slaughter slabs and recommends that strategies should be devised to improve the situation. Porcine ascariosis and cysticercosis were widely prevalent and caused economic losses due to condemnations. Because of their zoonotic nature, the observed extra-intestinal porcine helminth infections in pig pose a public health risk among consumers. Thus, there is a need to introduce appropriate control measures of parasitic infections in pigs.

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“…Boa et al (1995) examined eighty-three carcasses of pigs and reported that the mean number of hooks on the protoscolices was 27 and the length of the small hooks varied from 105 to 130 microns while that of the larger hooks varied from 168 to 174 microns.…”

Section: Discussionmentioning

confidence: 99%

Morphological characterization of Cysticercus cellulosae in naturally infected pigs in Punjab (India)

2014

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Porcine cysticercosis is an important medical and veterinary concern in the developing world. The present study was carried out to determine the morphological characteristics of Cysticercus cellulosae, so as to differentiate the C. viscerotropica (larval form of T. asiatica) which is having only rudimentary hooks on their rostellum. Morphological analysis was conducted on 22 Cysticercus positive samples. Measurements for number of hooks (large and small), the total length and blade length of large and small hooks per rostellum were carried out as per previous studies. Microscopic examination of all the cysts showed typical characteristic of T. solium i.e. presence of hooks in all the cysts. The results indicated absence of T. asiatica from naturally infected pigs in Punjab (India).

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The prevalence of Taenia solium metacestodes in pigs in northern Tanzania

Cited by 38 publications

References 7 publications

The emergence of Taenia solium cysticercosis in Eastern and Southern Africa as a serious agricultural problem and public health risk

The emergence of Taenia solium cysticercosis in Eastern and Southern Africa as a serious agricultural problem and public health risk

Prevalence of extra-intestinal porcine helminth infections and assessment of sanitary conditions of pig slaughter slabs in Dar es Salaam city, Tanzania

Morphological characterization of Cysticercus cellulosae in naturally infected pigs in Punjab (India)

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