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Biomedical subjects

M P English

Publications and source records attributed to M P English.

At least 19 recordsLinked to original sources
PubMed1980

Botryomycosis: a complication of extensive follicular mucinosis.

A case of extensive follicular mucinosis, without evidence of lymphoma and present for 9 years, was complicated by cutaneous botryomycosis which initially resembled sporotrichosis. Scanty Staphylococcus aureus was cultured with difficulty. No immunodeficiency could be demonstrated, and the importance of a local factor (namely follicular mucinosis) in the production of the characteristic histological reaction of botryomycosis is emphasized.

Diagnosis, Differential↗
PubMed1980

Infection of the finger-nail by Pyrenochaeta unguis-hominis.

Infection of the finger-nail of an elderly woman by Pyrenochaeta unguis-hominis is reported. The small lesion was extending slowly into the healthy nail plate. The fungus has been isolated from diseased toe-nails on two previous occasions but its extra-human habitat is unknown.

Aged↗
PubMed1979

Experimental infection of guinea-pigs with atypical and dysgonic strains of microsporum canis.

Pathogenicity tests with one dysgonic and six atypical strains of Microsporum canis were carried out on guinea-pigs. Five of the atypical strains were laboratory mutants from dysgonic strains isolated from living hosts. As sporulation and viability varied greatly between the strains, inocula consisted of suspensions of fungal fragments of known viable count. When a sufficiently active inoculum was used, lesions and fluorescent hairs were induced in the guinea-pigs by all but one of the strains tested. In each case the strain inoculated was reisolated from the lesions in pure culture. The significance of the results is discussed in the light of the unusual nature and origin of the strains.

Animals↗
PubMed1978

Dermatophytes in a population of bank voles and woodmice.

A population of bank voles (Clethrionomys glareolus) and wood mice (Apodemus sylvaticus) inhabiting an oak wood in Somerset was examined for dermatophytes at monthly intervals for 2 years. The marked animals were frequently retrapped, allowing a study of host fungus relationship over a period of time. Microsporum persicolor (Sabouraud) Guiart er Grigorakis and Trichophyton mentagrophytes (Robin) Blanchard were isolated from both animal species, but M. persicolor predominated in bank voles and T. mentagrophytes in wood mice. In their most favoured host, both dermatophyte species often persisted for several months, but in the less favoured host they were never isolated at more than one sampling. Males of both animal species were infected more often than females. The existing evidence for the geophilic nature of both fungi is reviewed and shown to be very weak, especially for M. persicolor. This is the first report from Great Britain of T. mentagrophytes infection of wood mice not in contact with human habitation.

Animals↗
PubMed1978

The dysgonic strain of Microsporum canis.

The dysgonic strain of Microsporum canis is described. The colony consists of fascicles of very wide hyphae with short compartments and close branching. Lateral branches often themselves remain short and fail to branch, and many are reflexive, growing in the opposite direction to the parent hypha. Mycelium of three types was noted, dysgonic, apparently normal, and forms intermediate between the two. Change from one form to another occurred in a cyclial manner, the transition from dysgonic to apparently normal being abrupt while that in the reverse direction was gradual. The strain was extremely unstable, both in primary isolations from cats and in subculture. Numerous sectors of other readily recognisable strains were produced, including the typical M. canis and various atypical strains previously obtained from human sources. These strains rapidly submerged their parent colonies and were much more likely to be obtained by subculture from a primary isolation plate than was the dysgonic strain itself. The relationships of the various strains to each other in the saprophytic and parasitic phases are discussed.

Animals↗
PubMed1978

On the occurrence of Microsporum persicolor in Montreal, Canada.

A case of Microsporum persicolor skin infection in a casual employee of a veterinary clinic in Montreal, Quebec, Canada, is reported. A survey of 80 wild rodents in the Montreal area resulted in the isolation of M. persicolor from two voles (Clethrionomys gapperi) and one deer mouse (Peromyscus maniculatus). One of the voles, heavily infested with parasites including ticks, had obvious lesions on the nose. This is the first report of M. persicolor in rodents in North America.

Adult↗
PubMed1978

Atypical strains of Microsporum canis.

Four atypical isolates of Microsporum canis, three from humans and one from a cat, were obtained from North-West London. These and a further human isolate were compared with each other and with a typical isolate of the fungus. Immediately after isolation the atypical isolates were very labile, but were stabilised after a few subcultures from selected sectors. The stable forms differed from each other, but all had a tendency to brown rather than yellow pigmentation, to feathery submerged mycelium and to abnormal macroconidia. The macroscopic appearance and texture of the colonies depended on the density, orientation and branching pattern of the submerged mycelium. In recent years similar brown, feathery forms of M. canis have been reported from monkeys but not from cats. It is suggested that all such isolates may be culturally stable forms of a very unstable strains, probably feline in origin, which has yet to be described.

Animals↗
PubMed1976

Familial favus.

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Adolescent↗
PubMed1976

Nails and fungi.

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Arthrodermataceae↗
PubMed1975

Arthroderma benhamiae infection in the Central African hedgehog Erinaceus albiventris, and a report of a human case.

The occurrence of ringworm caused by Arthroderma benhamiae Ajello & Cheng is reported in Central African hedgehogs (Erinaceus albiventris Wagner), caught near Nairobi, Kenya. Of the 45 animals examined, 10 were positive on culture, including a litter of 4 young. Six infected animals were without lesions, and 2 littermates showed scaly areas similar to those described in E. europaeus L. caused by Trichophyton erinacei (Smith & Marples) Padhye & Carmichael. No correlation with mite infestation or mange lesions was evident. Ringworm-like lesions were found which were repeatedly negative on culture. A human infection by A. benhamiae was contracted from the hedgehogs.

Age Factors↗