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Query: UMLS:C0851341 (infestation)
 10,121 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The report contains some results of a study of 18 patients where in 17 cases the authors believe that the convulsive syndrome was due to an infestation by ascarides, soatworms or by a combination of helminths with other enteral helminthosis. In one case intestinal parasitism aggravated the development of frontal epilepsy. It was demonstrated that the removal of helminths leads to an arrest of convulsive seizures, while a new infestation--to their appearance. The authors have attemped to give characteristics of the epileptical syndrome, provocated by ascarides and seat-worms.
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PMID:[Epileptic syndromes in ascariasis and enterobiasis]. 64 14

The size and form (length, width, and length: width ratio) of eggs of Diphyllobothrium dendriticum, D. ditremum and D. latum vary considerably among individual worms within each species. The size of eggs varies with host species and a decrease in egg size with increasing intensity of infestation is indicated. The egg size of D. latum increases during the first 10-12 days of egg production. For single worm infections in golden hamsters the mean egg length and width of D. ditremum are significantly smaller than the corresponding means of D. dendriticum and D. latum, while D. latum has significantly wider eggs than D. dendriticum. As taxonomic characteristics, egg size and form may contribute to species delimitation at the population level. For identification at the individual level the best possible accuracy is about 80%. This accuracy is considerably reduced when variation in host species and intensities of infestations are introduced. Scanning electron microscope studies did not reveal any differences among eggs of the three species.
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PMID:Egg size and form as taxonomic criteria in Diphyllobothrium (Cestoda, Pseudophyllidea). 65 89

After being exposed to infestation for 4 to 6 weeks, pairs of tracer calves were slaughtered to determine the seasonal incidence of helminth infestation in cattle on natural pasture. Haemonchus placei was recovered from March-July and from November-February, and peak burdens were recorded during December and January. There was marked inhibition in larval development from April-July. Trichostrongylus spp. were recovered from March-June and from November-February, the greatest number of worms being recorded during December. Cooperia spp. infestation occurred from March-August and November-February with peak burdens during April-June and December. From February-August more than 50% of the worms recovered were in the 4th larval stage of development. The greatest number of Oesophagostomum radiatum were recovered from June-January. Longistrongylus sabie and Impalaia tuberculata, parasites normally found in impala, were recovered from many of the survey animals, this being the first record of their occurrence in cattle.
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PMID:Parasites of domestic and wild animals in South Africa. XI. Helminths in cattle on natural pastures in the Northern Transvaal. 75 22

Infestation of the bile ducts by the adult Ascaris lumbricoides roundworm is a common condition in many parts of the world. The most frequent clinical presentation is as upper abdominal colicky pain with a normal or only slightly raised serum bilirubin. In most cases these worms can be visualized by intravenous cholangiography because of the absence of obstructive jaundice and can therefore be specifically treated by nonsurgical methods. The radiographic appearance is diagnostic. This is the first report of such a case presenting in North America or the United Kingdom, where the importance of biliary ascariasis in endemic areas is not fully appreciated.
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PMID:Biliary ascariasis presenting in the United States. 92 Jul 17

The survival and the transplantation of adult trichinae collected in cyclophosphamide treated and untreated mice were studied. 1) The worms'burden harbored by treated mice on the 18th day after the infestation is from 4 to 5 times higher than in untreated ones. The sex ratio is here around one instead of 1/2 in the control lot of mice. 2) The female worms parasitic in treated mice continue to lay larvae. When these adult are transplanted in the gut of treated mice they seem give a greater number of larvae than if they are put in the gut of normal mice.
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PMID:[Experimental trichinasis (IV), study of the action of cyclophosphamide on the transplantation of 18 days old adults of T. spiralis (author's transl)]. 98 72

We have collected all the reported cases of Echinococcus cysts recovered in every surgical ward in Mashhad since their establishment. At the same time we searched corpses of livestock which had been slaughtered in Khorassan's slaughter houses in different days since 1969 for evidence of cysts, and also dogs, 2 wolves, 4 jackals and 11 foxes which had been killed with strychnine, for adult worms. Occurrence of hydatid cyst infestation was found in 478 reports of surgical operations amongst 43,196 cases operated for various diagnosis including hydatidosis. The number of hydatid cyst infestation amongst 15,691 corpses is as follows: 881 out of 12,311 sheep and goats, 378 out of 3380 cattle and camels. The dogs' infestation was rather high as we found adult Echinococcus worms in 50 out of the examined 266, which gives a percentage of 18.79. But no worms could be found in the 2 wolves, 4 jackals and 11 foxes which were examined. All the adult worms examined were Echinococcus granulosus.
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PMID:An epidemiological approach to the study of Echinococcosis in North-East region of Iran (Khorassan). 100 35

Children with heavy Trichuris infestation were compared with paediatric amoebic dysentery patients and normal children. Heavy Trichuris infestation was diagnosed by visualization of worms on anoscopy. Patients with heavy Trichuris infection had a longer duration of disease, more frequent hospitalization and a higher rate of rectal prolapse than did patients with amoebiasis. Five Trichuris children also had clubbing. Trichuris patients had lower mean haematrocrits (27%) and serum albumin (3-3 gm%) than did patients with amoebiasis (32% and 3-7 gm% respectively). Coinfection with Shigella and Salmonella was significantly increased in patients with heavy Trichuris infection compared to both amoebic and control group children. Trichuris patients were infected with Entamoeba histolytica more frequently (46%) than normal children. Heavy Trichuris infection is the probable cause of symptoms and signs seen in these patients.
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PMID:Heavy Trichuris infection and amoebic dysentery in Orang Asli children. A comparison of the two diseases. 100 59

Twenty-eight Dorper wethers, allocated according to age into 4 groups of 7 animals each, and 1 group of 7 Merino wethers, were compared for susceptibility to Schistosoma mattheei infestation. The group mean ages of the Dorper sheep varied from 5-61 months and their live mass from 25-66 kg, while the Merinos were 8 months old and had a mean mass of 19 kg. Despite the marked differences in the age and live mass of the Dorper sheep and the inclusion of 2 breeds in the experiment, no statistically significant differences were found in cercariae which failed to penetrate the sheep the mean percentage development of cercariae to adult worms, worm distribution in the mesenteric and gastric radicles of the portal vein and the pulmonary arterial system, and worms not removed by perfusion. Significant differences between groups (5% significance level) were found, however, in the number of worms recovered from the hepatic portal system, and in the worm sex ratio. On 3 occasions the total number of eggs excreted per female schistosome in the mesentery per 24 hours differed significantly between groups, but each time a different group or groups of sheep were responsible for the variation which was probably due, therefore, not to the age or breed of the sheep, but to daily variations in individuals. Highly significant differences occurred in the infectivity of the 6 cercarial pools used for infestation in spite of standardized collection and handling of the cercariae. Possible reasons for this are discussed and a solution suggested. Frequent egg counts (5 per sheep per week) were done during the first 25 days of patency, until the sheep were slaughtered. Schistosome ova were detected in the faeces of only 1/18 sheep examined on Day +43 after infestation, and 3/17 on Day +44, whereafter this increased rapidly to 15/34 on Day +45, 25/33 on Day +46, etc. A highly significant correlation was found between the total worm egg excretion in the faeces of the sheep per day and the numbers of female schistosomes in the mesentery, especially shortly after the onset of egg production.
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PMID:Studies on schistosomiasis. 8. The influence of age on the susceptibility of sheep to infestation with Schistosoma mattheei. 101 89

In lactating females of many animal species infested by Nematoda, the self-cure is, if not suppressed, at least very distinctly delayed. It does not appear that an immunological deficiency is the cause of this. We show that this phenomenon also exists in lactating female rats with Strongyloides ratti parasites. In fact, for Strongyloides ratti, the maintenance of the worms is not the only notable modification determined by lactation; much more important is the decrease in the intensity of the parasitism. This aspect is not mentioned by writers who have only studied the different parasitic states in their final phase. Parallel to these alterations in the parasitism, the evolution of the corticosteronemy differs, from two points of view, from that described in infested virgin rats: --Suppression of the hypercorticosteronemy which normally appears 48 hours after infestation; --Attenuation of the hypocorticosteronemy which usually sets in from the tenth day of infestation. This opposition of lactation to the variations in the corticosteronemy induced by the worms is explained by the effect of lactation on the secretion of gluco-cortico-steroids, described under the term of "buffer effect of lactation". The decrease in the intensity of the parasitism may be explained by the fact that lactation, by preventing the hypercorticosteronemy normally caused by larval migration, permits the intervention of aspecific defences. As for the prolongation of the parasitism, it would seem to result on one hand, from a reduced solicitation of the means of defence owing to a smaller number of worms and, on another hand, from the slowing down of the hypocorticosteronemy through the buffer effect of lactation with all the consequences flowing from this at the level of the specific and aspecific defence reactions.
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PMID:[The effect of lactation on the parasitism of rats by Strongyloides ratti (author's transl)]. 102 Aug 90

Two Nigerian patients with intraocular parasitism by adult Loa loa worms are reported. Whereas Loa loa infestation of the subcutaneous tissues around the eye usually has no permanent effect on visual acuity, in the two cases reported the affected eye became blind.
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PMID:Filarial worm (Loa loa) in the anterior chamber. Report of two cases. 113 58


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