Showing papers in "Angewandte Parasitologie in 1978"

Insects and other pests affecting man and animals in Saudi Arabia.

Abstract: Survey of the insects and other pests attacking farmers and domestic animals was carried out during three successive years (1968, 1969 and 1970) in the Central province of Saudi Arabia. In this paper, the insects and other pests found were given. Also, location and time of appearance for each pest were mentioned. The pests recorded were 6 species of insects belonging to 5 families and 4 orders attacking farmers; 9 species of insects belonging to 8 families and 4 orders, and 9 species of mites and ticks belonging to 5 families attacking domestic animals.

Helminths of the ploceid Textor cucullatus from Ghana.

Abstract: Two nematode species (Geopetitia sp. and Diplotriaena ozouxi) and an acanthocephalan (Mediorhynchus textori n. sp.) are described. The diplotriaenid has been recorded from a new host and also from a new locality. Because of homonymy of Geopetitia chaubaudi VUYLSTEKE, 1963 with Geopetitia chaubaudi RASHHED, 1960 a new name G. vuylstekei nom. nov. is proposed for the former species. Mediorhynchus textori is characterized by lesser number of rooted hooks arranged in spirals on theproboscis. The eggs of this species bear variable floats.

On cestodes of passer domesticus II. Anonchotaenia and Mathevotaenia.

Abstract: This part includes the account of Anonchotaenia globata (LINSTOW, 1879) and its embryo, and of Mathevotaenia ornithis sp nov--Anonchotaenia globata is know to be a parasite of Passer domesticus in foreign countries The writers record it for the first time in India in this bird This species is also known from other birds, but not so far recorded even in other birds in India VOGE and DAVIS (1953), METTRICK (1958) and MAHON (1958) previously studied this species The present study contributes additional data to the morphology of this species Variations in the number of testes, extent of cirrus sac, and position of genital pore have been recorded A definite neck has been found Calcareous corpuscles, occurrence of which is not on record in this species, have been found in the present material Paruterine organ, to which previous workers paid scant attention, has been studied in detail It is a complex three-layered structure Eggs undergo development upto the formation of embryos while they are still in the uterus, and subsequently they all pass into the paruterine organ which is found teeming with embryonated eggs Eggs are quite characteristic in shape Two coverings are found around the embryos: the outer one, the shell capsule, is spindle-shaped and cornuted; the hexacanth enclosed in a membrane is housed in the dilated middle part of the shell capsule Hexacanth is an elongated structure with a dilated middle part and not a uniform width Hence the term "nematodiform" embryo used for it is rather inappropriate Three pairs of hooks are present in the dilated middle part of the embryo WOODLAND (1929) and METTRICK (1958) denied the existence of the hooks--Mathevotaenia ornithis sp nov is the first species of the genus Mathevotaenia AKHUMIAN, 1946 that has been described from an avian host, other species are known from mammalian hosts Amongst the mammalian species, the present form comes close to Mathevotaenia deserti (MILLEMANN, 1955) and M hardoiensis JOHRI, 1961, but differs from either in several features This species is chiefly characterized by the number and distribution of testes, bilobed ovary, genital ducts passing between the excretory canals, vitellarium V-shaped, and cirrus sac extending aporally beyond the excretory canals Besides, the bearing of the receptaculum seminis on the taxonomy of the genera Mathevotaenia AKHMUIAN, 1946 and Atriotaenia SANDGROUND, 1926 has been discussed, and an amendment in the generic delineation has been suggested for these genera--Systematic position of Mathevotaenia antrozoi (VOGE, 1954) YAMAGUTI, 1959 has been discussed and the species has been assigned to Atriotaenia

Parasites in the GDR.1. Studies on helminths occurrence in European wild pigs (Sus scrofa)

Abstract: In two different hunting-grounds in the north-eastern part of the GDR from November 1972 to March 1974 the authors tested a series of 102 killed wild boars, aged mostly from 7 month to 3 years by means of helminthological dissection and by coprological methods for helminthic stages. From more than 30 well known species of helminths the following 10 species were found: Cysticercus tenuicollis, Echinococcus hydatidosus, Ascaris suum, Ascarops strongylina, Physocephalus sexalatus, Globocephalus urosubulatus, Metastrongylus elongatus, M.pudentodectus, M.salmi and Trichuris suis. Trichinella spiralis could not be found in any case. Finally some information given of extensity and intensity of helminth-infection, parasite-host-relation with regard to the age of host and the occurrence of helminths of wild-boars in the middle-european region.

List of trematodes of the GDR

Abstract: Short systematic-ecographical documentation of the trematode species hitherto found in the territory of the German Democratic Republic and the adjacent region of the Baltic Sea as a systematic list (alphabetically arranged after classes, orders, families, genera and species). Information on the synonyms important for the territory treated, on the cycle (limnical, marine, terrestrial; host categories, host groups), on the host species recorded for the territory, on the district of findings, on the literature referring to the findings, and on the wrong determinations so far recognized. There are 269 recorded species (177 with or presumably with a limnical, 59 with a marine, and 25 with a terrestrial cycle within the territory).

Developmental cycle of Stomylotrema vicarium

Abstract: With metacercariae encysted naturally in the visceral cavity of Megadytes glauca-larvae (Dityscidae), day old unfed chicken and a Belonopterus cayennensis were infected and adults of Stomylotrema vicarium Braun, 1901 obtained. Metacercariae and adults have an excretory bladder with lateral ramifications and 4 groups of 10, exceptionally 12 flame cells on each body side. Very young metacercariae without cysts presented a big stylet. A corresponding virgula-cercaria in Ampullaria canaliculata is supposed.

Two new species of trypanosomes from Indian fresh water fishes. II.

Abstract: Two new trypanosomes, viz. Trypanosoma anabasi sp. nov. from Anabas testudineus (Bl.) and T. cancili sp. nov. from Xenentodon cancila (Ham.) are described from India. Both of them are monomorphic. The former is provided with a prominent undulating membrane as well as a long and well differentiated flagellum but the latter has a less defined undulating membrane with a small and extremely weak flagellum.

[Fly density determination in cow-sheds].

Abstract: Considering the tropical conditions of the Republic of Cuba and the usually applied methods of measuring fly-density, a photographic method was developed and tested basing on the experience of the SCUDDER-fly-grill method. In this method the flies are photographically counted in defined areas of 0.25 m2 of extension, which are determined according to the concrete conditions in the animal production units. An index of the fly density (in flies per m2) is calculated. The exact comparison of different animal production units will be obtained by the selection of the defined areas for the photographic counting, always the equal times for measuring, and the consideration of the situation in the production cycle.

Protozoa of small mammals in the Neusiedlersee region

Abstract: During the years 1975 and 1976, 169 mammals (26 species) were investigated for their parasites. It was possible to recognise 33 different species of protozoans, belonging to the following genera: Trypanosoma, Giardia, Hexamita, Entamoeba, Eimeria, Isospora, Toxoplasma Frenkelia, Hepatozoon, Babesia, Balantidium, Pneumocytis, Grahamella, Eperythrozoon.--Epidemiology and eventual pathogenic effects are briefly discussed.

Drinking of eye secretion by malloghages

Abstract: The until now known facts on the phenomenon that biting lice may drink the eye-fluids of their hosts are listed. These data are supplemented by further relevant observations (own and from others). In this respect, the menoponid species Myrsidea (Wolfdietrichia) cornicis and Gallacanthus kaddoui are concerned.

[Contribution on the parasite fauna of the GDR. 2. Studies of the incidence of helminths in roe-deer (Capreolus capreolus)].

Abstract: The authors show the results of researches on the helminthofauna in roe deers from two different hunting-grounds. The results are compared with those of other authors in GDR and the Central European region. In roe deers 37 different helminths--1 species of Trematoda, 3 species of Cestoda and 33 species of Nematoda--are found up to till now in GDR. Finally some informations are given about the extense- and the intense-infection of the hosts.

[Massive infestation of Goniocotes megalocephalus on an injured hazel-cock].

Abstract: A strong infestation of Goniocotes megalocephalus [Mallophaga] on the adult male of Hazelgrouse (Tetrastes bonasia rupestris C. L.Brehm, 1831), which died gradually in cause of a trauma, is described. The result of examination and circumstances of it are dicussed. The poor condition of the bird caused by the trauma and its reduced activity during the winter season were probably the most important factors, on account of these the population of the parasites was increased.

Effect of the pH of Ascaridia galli egg culture medium on the experimental infection in chickens

Abstract: 1. A prolonged preservation of Ascaridia galli eggs in acid medium when cultivating them under laboratory conditions inhibits considerably the establishment of Ascaridia galli in the organism of chickens. The neutralization of medium of egg cultivation 3 days before their application for infesting facilitates the increase of larvae established in the organism. 2. In chickens invaded with Ascaridia galli eggs cultivated in medium with pH 8.0, larvae develop in the period of 7--21 days of invasion in the amount of 2.5--69 times more than in chickens receiving the same eggs but which have been cultivated in acid medium (pH 2.2) for the whole cultivation period. 3. With the increase in invasion period, the number of established larvae decreases in both test groups, but in chickens receiving eggs which have been cultivated in medium with pH 8.0, the number of larvae is considerably higher.

Genetic control of Blattella germanica

Abstract: Based on a literature survey, the possibilities of a genetic control of the German cockroach (Blattella germanica) are shown. First, an oversight is given on the cytogenetics of the German cockroach, including some important mutations. Then the control methods by genetic mechanisms are explained. This chapter begins with analysing the relevant biological pecularities. In control measures, the dominant lethal mutations (induced by rays rich with energy and by chemosterilants) have only a chance if they can be applied in the scope of autosterilization of natural populations. Reciprocal translocations may expect maximum consideration in the future of the control of the German cockroach. Some of these are already available in the heterozygote state. But the establishment of homozygous strains was not yet successful up to now. The possibilities of the application of translocation-heterozygotes are discussed. Such mutant strains of cockroaches which bear several translocations in the heterozygous state, offer the most promising way of control. This may even include the population's eradication. A long-lasting regulation of the population may be achieved with the introduction of insects mutated in this manner even in the case if a complete eradication is not attainable. It might be expected that also other genetic mechanisms may contribute, in future, to the improvement of cockroach control. Such mechanisms may be conditional lethal factors, sex distortions, and others more.