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PubMed1996

Intestinal parasitic infestation among different population groups of Andaman and Nicobar islands.

A survey was carried out among the rural and urban settlers and two tribal groups viz. Nicobarese and Onges, of Andaman and Nicobar islands. The survey covered preschool school aged children and adults. Out of the total 1,384 stool samples examined, 652 (47.1%) showed ova or cysts of one or more intestinal parasites. Among the preschool children, Nicobarese showed the highest overall prevalence rate (80.5%) followed by urban (46.7%) and rural (38.6%) preschool children. Ascaris lumbricoides was the commonest form of parasite encountered in all the groups of preschool children, followed by Trichuris trichura. While ascariasis and trichuriasis were more common among the urban children than in rural children, giardiasis was more common among the rural preschool children. The school age children among rural settlers showed an overall prevalence rate of 61.1% which was significantly higher than that among the rural preschool children. Among the school age children also, ascariasis was the commonest form of parasitosis followed by trichuriasis. The Nicobarese and Onge adults showed significantly higher overall prevalence rates (72.2%) and 71.1% vs 48.6%) compared to rural adults. In all the groups studied ascariasis was the commonest form of parasitosis except in Onges among whom trichuriasis and giardiasis were more common than ascariasis. Change in prevalence rates over age was studied among the rural settlers. While ascariasis and trichuriasis showed peak prevalence rates in school age children prevalence of giardiasis declined with increase in age from a peak in the preschool age group and prevalence rates of hook worm infestation continued increasing beyond school age.

Adolescent↗
PubMed1990

Intestinal parasites of conventionally maintained BALB/c mice and Mastomys coucha and the effects of a concomitant schistosome infection.

A longitudinal study was carried out to identify the spectrum of intestinal parasites present in conventionally maintained BALB/c mice and Mastomys coucha and to determine the effects of concomitant schistosome infections on their parasite status. Six parasites were observed during the course of the study, namely the nematodes Aspiculuris tetraptera and Syphacia obvelata, Entamoeba muris and the flagellates Trichomonas muris, Spironucleus muris and Chilomastix spp. Although the 2 rodents shared common facilities, the overall prevalences of S. obvelata, T. muris and S. muris were significantly higher in M. coucha than BALB/c mice. BALB/c mice with concomitant schistosome infection had increased prevalences of E. muris, T. muris and S. muris. In M. coucha, in contrast, there were no significant increases in parasite prevalences. Infection intensities of T. muris and S. muris were significantly greater in M. coucha than BALB/c mice. Concomitant schistosome infection resulted in increased intensities of T. muris infection in BALB/c mice only. The influence of immune status in determining the susceptibilities of rodents to environmentally transmitted parasites is discussed.

Animals↗
PubMed1980

The use of the Kohn chlorazol black fixative-stain in an intestinal parasite survey in rural Costa Rica.

The Kohn one-solution chlorazol black (KCB) fixative-stain was used in the examination of stools from 162 children for intestinal parasites in rural, northern Costa Rica. Many more parasites were found by examining the stained smears than were seen on fresh smears. This was especially true of protozoan parasites. The advantages of the KCB technique are, as follows: (1) its simplicity; (2) the stability of the stain in solution and on slides; (3) the ability to use the stain with carbol-xylol in humid regions; and (4) the metachromatic qualities of the stain.

Child↗
PubMed1981

Intestinal parasites of man in Bukidnon, Philippines, with emphasis on schistosomiasis.

A total of 831 fecal specimens from Malay-balay, Mindanao, Philippines were examined for schistosomiasis and common intestinal parasites. Schistosoma japonicum eggs were found in 16% of the samples. Infections were more common in males (20%) than in females (12%). Age-wise, infections were infrequently diagnosed in children less than 10 years and infections in older age groups varied from 12-27%. Hookworm, chiefly Necator americanus, was the most common parasite found (44%) followed by Ascaris lumbricoides (32%) Trichuris trichiura was found in only 12%. Enterobius vermicularis and eggs of Taenia sp., echinostome, heterophyid and dicrocoelid trematodes were identified in less than 1% of the samples. Entamoeba histolytica, Entamoeba coli, Entamoeba hartmanni, Endolimax nana, Giardia lamblia, Iodamoeba butschlii, Trichomonas hominis and Chilomastix mesnili were also found to parasitize man in this region of Mindanao.

Adolescent↗
PubMed2002

Prevalence of intestinal parasites in dogs from São Paulo State, Brazil.

The prevalence of gastrointestinal parasites in stray dogs, and dogs with owners was investigated by fecal examinations from 271 dogs employing sedimentation, simple flotation and centrifugation-flotation methods. The centrifugation-flotation method, when compared to simple flotation or sedimentation methods was generally more accurate in the diagnosis of all intestinal parasites, but statistical differences were detected only in relation to Giardia spp. and Cystoisospora spp. (synonym Isospora spp.). The following parasites, with their respective prevalence, were diagnosed in the fecal samples: Ancylostoma spp. (23.6%); Toxocara canis (5.5%); Trichuris vulpis (4.8%); Spirocerca lupi (1.9%); Dipylidium caninum (0.7%); Giardia spp. (12.2%); Hammondia heydorni (2.6%); Cystoisospora spp. (8.5%); and Sarcocystis spp. (2.2%). The prevalence of most parasites was similar for dogs of mixed-breed and for dogs of a defined-breed, except for Cystoisospora spp. and T. canis which showed a significantly higher prevalence in mixed-breed dogs. The prevalence of Ancylostoma spp. (17.1%) was significantly lower in stray dogs than in those with an owner (31.9%) and the prevalence of Giardia spp. and Cystoisospora spp. was higher in stray dogs (P < 0.05). No effect of season on the occurrence of the different parasite genera could be observed, except for Ancylostoma spp., for which an increase in the percentage of dogs shedding eggs was observed at the beginning of Summer with a peak occurrence during April and May (Autumn). The prevalence of Ancylostoma spp., T. canis, T. vulpis, Giardia spp. and Cystoisospora spp. was higher in adult males than in adult females, but significant differences between the two groups occurred only with Giardia spp. Young animals were found to more frequently shed Nematode eggs in feces than adult animals.

Age Factors↗
PubMed1987

Human cysticercosis and intestinal parasitism amongst the Ekari people of Irian Jaya.

A random sample of 242 people showed that 42 had palpable cysts of Taenia solium. Faecal examination recovered eggs of T. solium in seven (3%), while Trichuris (83%), Ascaris (83%), hookworms (76%), Strongyloides stercoralis (10%) and Strongyloides sp. (29%), Entamoeba histolytica (14%), Entamoeba coli (22%), Entamoeba hartmanni (7%), Entamoeba polecki (7%), Balantidium coli (9%) and Dientamoeba fragilis (21%) were the most common other intestinal parasites encountered. ELISA tests, using antigens prepared from adults and eggs of T. solium and from cysticerci of T. saginata were not very sensitive, the last diagnosing less than half of known positives while still retaining good specificity.

Adolescent↗
PubMed1976

Gastro-intestinal parasites of feral cats in New South Wales.

A total of 146 feral cats from several localities in New South Wales were examined for the presence of gastro-intestinal parasites. The cestodes recorded, and their prevalence, were Taenia taeniaeformis (21.9%), Spirometra erinacei (61.0%) and Dipylidium caninum (11.6%). One animal contained 31 T. serialis scolices considered to be the contents of a recently ingested Coenurus serialis. The common nematodes encountered and their prevalence were Toxocara cati (21.9%) and Ancylostoma spp (23.3%). Uncinaria stenocephala were found in 2 cats and a stomach wall tumour containing Cyathospirura dasyuridis was found in 1 cat, An acanthocephalan resembling Oncicola canis was the most prevalent parasite among feral cats in this survey. High burdens of S. erinacei, D. caninum, Ancylostoma spp and Oncicola sp were found. Samples from 4 localities in New South Wales were compared and there were major differences in the prevalence of T. taeniaeformis, D. caninum and T. cati. Ancylostoma spp occurred only in the Sydney (53.2%) and the Warren (4.8%) areas. Oncicola sp was not present in the Sydney area, but occurred in the Young area in 23.5% of the feral cats examined and in the Warren area (33.3%) and was most prevalent in the Menindee area (79.2%).

Animals↗
PubMed2001

Relationship of intestinal parasites to the environment and to behavioral factors in children in the Bolikhamxay Province of Lao PDR.

From March to July 1998 the infection rates of 732 children aged below 15 years were assessed. The investigation was conducted in selected villages of the Bolikhamxai Province in Lao PDR. Socio-economic conditions and behavioral pattern were studied. The three soil-transmitted helminths, Ascaris lumbricoides, Trichuris trichiura and hookworm were found with prevalence rates of 67.14, 17.49 and 12.83%, respectively. Infection rates with other intestinal parasites were negligible. Of the children investigated, 56.7% harbored one and 20.45% more than one parasite. Except for hookworms, no statistically significant differences were found between genders. The probability of being infected with A. lumbricoides is associated with living in mountainous areas. For hookworms, infection is associated with staying in the plains. A river in the vicinity of the village is linked with the probability of being infested with Trichuris trichiura. Not to belong to a family with the ability to own expensive items increases the probability by almost two times of getting infested with A. lumbricoides. Unhygienic behavioral factors were important in increasing the probability of suffering from A. lumbricoides and T trichiura infection. Behavioral factors did not seem to be related to hookworm infections. It was concluded that after mass treatment, besides promoting the construction of toilets, it is also important to improve personal hygiene so that a lasting impact on the infection rate of the most prevalent parasites in Lao PDR could be achieved. Measures to control parasitic infections do not have to be postponed until a marked improvement of the economic situation has occurred.

Adolescent↗
PubMedDate not supplied

Incidence of intestinal parasitism in allergic children.

Enteroparasites rarely reach limits of clinical severity although their different manifestations oblige one to consult pediatricians and other specialists. In our cases, patients consulted the Department of Allergology for the presentation of recurrent urticarial reactions, recurrent cough and other manifestations that can be interpreted as allergic in origin. It is the objective of this present study to carry out a review and a statistical study of the incidence of intestinal parasitism in children who consulted for some type of allergic manifestation. We intend to evaluate the unfavorable effects that enteroparasites produce in these patients which can perpetuate the clinical symptomatology. Six hundred and eleven children with ages ranging from 2 to 12 years, and who were attended in our allergology consultancy during a 2 year period, were studied. An intracutaneous test to the different group of food and inhalant antigens, stool examination and investigation of enterobius was carried out on all of them. On 37 children an "in vitro" test to evaluate cellular and humoral immunity was carried out aside from the other explorations mentioned.

Antibody Formation↗
PubMedDate not supplied

[Intestinal parasite contamination of vegetables sold at supermarkets in the city of Rio de Janeiro].

Parasitological examinations were performed in material derived from 220 vegetables to detect cysts and eggs of intestinal parasites. This material was collected from supermarkets in northern and southern areas and from CEASA (Central Supply Market--40 vegetables) in Rio de Janeiro city. Vegetables proceeding from the northern areas presented a greater degree of contamination mostly of helminth eggs; lettuce was the most contaminated vegetable. The authors suggest that differences found between the northern and southern areas of the city may be due to either packing or manipulation by shop assistants and consumers.

Animals↗
PubMed1990

Prevalence of Salmonella, Shigella and intestinal parasites in food handlers in Irbid, Jordan.

During a one-year period, 283 food handlers in Irbid, Jordan were investigated for the presence of potential enteropathogens in their stools. The prevalence rate of enteropathogens among non-Jordanian food handlers (48.0%) was significantly higher (p less than 0.05) than that of the Jordanian group (12.3%). The isolation rates of Salmonella and Shigella were 6% and 1.4% respectively. Multi-drug resistance was frequent among isolates of Salmonella group B and Shigella spp. Intestinal parasites detected in the stools of food handlers included Ascaris lumbricoides (4.9%), Giardia lamblia (3.9%), Schistosoma mansoni, (2.8%), hookworms 2.5%, Hymenolyepis nana (1.8%), Trichuris trichiura (1.1%), Entamoeba histolytica (0.7%), and Taenia saginata (0.4%). This study emphasises the importance of food handlers, particularly the non-Jordanians, in Jordan, as potential source of food-borne infection.

Adult↗
PubMed2006

Estimation of canine intestinal parasites in Córdoba (Spain) and their risk to public health.

The prevalence of gastrointestinal parasites in dogs was studied in the province of Córdoba (southern Spain), with special attention to those parasites that can be transmitted to man. The experiment was completed with the examination of soil samples from public parks and city gardens. The study was carried out over a population of 1800 animals entered in the Control Animal Centre (CECA) by coprological methods, and within this group, 300 dogs were sacrificed and necropsied. The prevalence of any intestinal parasitic infection was 71.33%. The following parasites of the gastrointestinal tract were recorded: Isospora canis (22%), Isospora (Cystoisospora) spp. (10.22%), Sarcocystis (2.5%), Hammondia/Neospora (1.94%), Giardia canis (1%), Dipylidium caninum (13.2%), Taenia hydatigena (7.66%), Taenia pisiformis (4%), Uncinaria stenocephala (33.27%), Toxascaris leonina (14.94%), Toxocara canis (17.72%) and Trichuris vulpis (1.66%). Related to public health, it is important to point out the presence of T. canis only in puppies younger than one year and Uncinaria, more frequent in adult dogs. Soil samples of parks revealed the presence of eggs of Toxocara, and it suggests the existence of real risk for human infection.

Animals↗
PubMed1988

Occurrence of some blood and intestinal parasites in dogs in Curaçao, Netherlands Antilles.

In August 1986, 133 dogs at the Veterinary Service of the Netherlands Antilles and the SPCA of Curaçao were examined for microfilaremia and for evidence of gastrointestinal parasitism. Microfilariae of Dipetalonema reconditum were present in 27.8% of the dogs examined with no significant difference in the infection rate between domestic and feral dogs. Microfilariae of the canine heartworm Dirofilaria immitis were found in 9% of the dogs with a significantly higher rate of infection in domestic (pet) dogs (13.5%) than in feral dogs (3.4%). Of the intestinal parasites observed Ancylostoma sp. was present in the highest percentage of dogs (68.4%) followed by Toxocara sp. (7.5%). Other parasites were present in less than 5% of the dogs examined and included, in decreasing order of prevalence, Spirocerca sp., Giardia sp., coccidia, Taenia sp. and Trichuris sp. The present paper presents the first evidence of Di. reconditum on Curaçao and suggests the introduction of D. immitis to the island within the 10 years preceeding this report. The persistently high rate of infection with Ancylostoma underscores the continuing risk of cutaneous larva migrans to human beings in the region.

Animals↗
PubMed2005

Intestinal parasite isolates in AIDS patients with chronic diarrhea in Gondar Teaching Hospital, North west Ethiopia.

Chronic diarrhea is one of the major AIDS-defining illnesses in WHO Classification and occurs in 60-90% of HIV-infected patients in Africa. We did a case series study on parasite isolation in stool samples of AIDS patients with chronic diarrhea using wet-mount, Formol-Ether concentration technique and Modified Acid-Fast staining method in Gondar Teaching Hospital between January and September 2000. Seventy AIDS patients with chronic diarrhea were included in the study. Wasting syndrome was the clinical presentation in (97%) almost all AIDS patients who had chronic diarrhea. Intestinal parasites were detected in 41 out of 70 diarrheal specimens in AIDS patients. Multiple parasitic injections were detected in three diarrheal specimens. Intracellular parasite, (29%) Cryptosporidium parvum, and mucosal parasite, (17%) Strongyloides stercoralis were the frequently isolated parasites in diarrheal specimens of AIDS patients, accounting for 80% diarrhaegen pathogens among positive specimens. Cryptosporidium parvum, under-estimated cause of chronic diarrhea in immunocompetent adults, was found to be the prominent diarrheagen in AIDS patients in this study, similar with other studies in different African countries.

AIDS-Related Opportunistic Infections↗